CN116784535A - A heating body, an atomization device and a preparation method of the heating body - Google Patents

Abstract

A heating body, an atomization device and a method for preparing a heating body, wherein the heating body includes a base electrode, a capping electrode and a two-dimensional material body; the two-dimensional material body is vacuum sealed between the capping electrode and the base electrode and is connected to the base electrode respectively. The two are in electrical contact. First, the heat generated by the two-dimensional material body can be directly and expressly transferred to the base electrode or cover by utilizing the characteristics of the two-dimensional material body such as high resistance value, small impulse current at startup, and its electrical contact relationship with the electrode. The electrodes realize the external heating or heating function of the heating body, effectively improving the thermoelectric conversion efficiency of the heating body; secondly, the two-dimensional material body is arranged inside the heating body in a vacuum-sealed form, which can prevent the two-dimensional material body from being damaged when working at high temperatures. oxidation, and make full use of its characteristics such as strong heat resistance and stability in a vacuum atmosphere, so that the two-dimensional material body or the heating body as a whole can exert its unique electrical and thermal advantages for a long time, providing a stable, reliable and long-term high-temperature application for the heating body. Assure.

Description

A heating body, an atomization device and a preparation method of the heating body

Technical field

The invention relates to the technical field of heat-not-burn technology, and in particular to a heating body, an atomization device and a preparation method of the heating body.

Background technique

Taking the heat-not-burn atomization device as an example, the heating element (also called a heating element), as one of the core components of the atomization device, heats the aerosol-generating substrate to a specific temperature range to generate usable aerosol. The role of aerosol; therefore, the performance of the heating body has a crucial impact on the overall performance of the atomization device.

Existing heating bodies often use metal thick-film heating materials or metal thin-layer heating materials; among them, metal thick-film heating materials usually refer to the use of screen printing processes, sequential printing on metal substrates and high-temperature sintering of electrical insulating materials. The heating material body is formed after layers, heating resistor material layers, electrode layers and surface protective layers; metal thin-layer sheet heating materials usually refer to the heating material body formed by wrapping a heating film on a metal substrate, and The heating film is usually a flat heating element composed of an electrical insulating material and a heating electronic material disposed inside it. In practical applications, existing heating bodies generally have problems such as low thermoelectric conversion efficiency and poor long-term operating reliability at high temperatures.

Contents of the invention

The main technical problem solved by the present invention is to provide a heating body, an atomization device using the heating body and a method for preparing the heating body, so as to achieve the purpose of improving the thermal and electrical properties of the heating body.

According to the first aspect, an embodiment provides a heating body, including a base electrode, a capping electrode and a two-dimensional material body; wherein the capping electrode is arranged facing the base electrode, and the capping electrode is in contact with the base electrode. The surfaces of the base electrodes facing each other each have a first region and a second region, the first region of the capping electrode and the first region of the base electrode are electrically insulated from each other; the two-dimensional material body is vacuum sealed in Between the capping electrode and the second region of the base electrode, and the two surfaces of the two-dimensional material body that are opposite in the thickness direction thereof are in electrical contact with the capping electrode and the base electrode respectively.

In one embodiment, the number of the two-dimensional material bodies is set to be multiple, and the plurality of two-dimensional material bodies are arranged at intervals between the base electrode and the capping electrode.

In one embodiment, the two-dimensional material body includes a diaphragm made of at least one material selected from the group consisting of graphite, graphene, molybdenum sulfide, tungsten sulfide, cubic boron arsenide, boron nitride, boron phosphide and tantalum nitride. Structure.

In one embodiment, the resistance value of the two-dimensional material body in the thickness direction is at least 10 times greater than the resistance value in the length direction or width direction.

In one embodiment, the second region of the base electrode and/or the second region of the capping electrode is provided with a holding chamber, and the holding chamber is used to hold at least a part of the two-dimensional material body.

In one embodiment, the capping electrode and the base electrode are sealed and fixed in the first area by vacuum welding, so that the two-dimensional material body is vacuum sealed to the third portion of the capping electrode and the base electrode. between two regions.

In one embodiment, a compensation structure is provided on a side of the base electrode facing the capping electrode. The compensation structure is located in the corresponding first area. The compensation structure is used to compensate for the capping during vacuum welding. Deformation produced by the cover electrode.

In one embodiment, the base electrode is a tubular structure or a columnar structure, and the capping electrodes are all tubular structures; wherein, the capping electrode sleeve is placed on the outer peripheral side of the base electrode, and the capping electrode The axial end of the base electrode and the axial end of the base electrode are electrically insulated and sealed with each other;

or

The base electrode is a tubular structure or a columnar structure, and the capping electrode is a sheet structure; wherein, the capping electrode is stacked on the outer wall surface of the base electrode and covers the two-dimensional material body on the Base electrode; the area of the capping electrode located outside the geometric outline of the two-dimensional material body and the outer wall surface of the base electrode are electrically insulated and sealed with each other;

or

Both the base electrode and the capping electrode have a sheet-like structure, the two-dimensional material body and the capping electrode are stacked on the base electrode in sequence, and the capping electrode and the base electrode are located at Areas outside the geometric outline of the two-dimensional material body are electrically insulated and sealed from each other.

In one embodiment, the base electrode and the capping electrode are both made of conductive material, and at least the first region of the base electrode and/or the first region of the capping electrode is provided with an electrically insulating material layer, The electrically insulating material layer is used to provide electrical insulation between the base electrode and the capping electrode;

or

The first region of the base electrode and/or the first region of the capping electrode is made of electrically insulating material, and the second region of the base electrode and/or the second region of the capping electrode is made of conductive material. production.

In one embodiment, a first conductive layer is provided between the capping electrode and the two-dimensional material body to achieve electrical contact between the capping electrode and the two-dimensional material body; the base body A second conductive layer is disposed between the electrode and the two-dimensional material body to achieve electrical contact between the base electrode and the two-dimensional material body.

In one embodiment, one of the first conductive layer and the second conductive layer is a conductive layer with low thermal conductivity, and the other one of the first conductive layer and the second conductive layer is with high thermal conductivity. Thermal conductivity of the conductive layer.

According to the second aspect, an embodiment provides an atomization device, including a power supply module and the heating body described in the first aspect, and the base electrode and the capping electrode are electrically connected to the power supply module respectively. set up.

According to a third aspect, an embodiment provides a method for preparing the heating body described in the first aspect, including:

electrically insulating the first region of the base electrode and/or the first region of the capping electrode;

Arrange the two-dimensional material body and the capping electrode in sequence on the base electrode, so that the two-dimensional material body is located between the base electrode and the second region of the capping electrode;

Fixing and sealing the first area of the base electrode and the first area of the capping electrode in a vacuum environment to vacuum seal the two-dimensional material body between the base electrode and the capping electrode and make the two-dimensional material body electrically contact with the base electrode and the capping electrode respectively.

In one embodiment, electrically insulating the first region of the base electrode and/or the first region of the capping electrode includes:

An electrically insulating material is fixed to the first region of the base electrode and/or the first region of the capping electrode by at least one of sputtering, spraying, printing, nitriding and oxidation to form electrical insulation. material layer;

and / or

Before electrically insulating the first region of the base electrode and/or the capping electrode, the method further includes: setting a holding chamber in the second region of the base electrode to accommodate the two-dimensional material. at least part of the body.

In one embodiment, arranging the two-dimensional material body and the capping electrode sequentially on the base electrode includes:

positioning the two-dimensional material body in the second area of the base electrode;

Arrange brazing solder in a preset position of the first region of the base electrode and/or the first region of the capping electrode after electrical insulation;

Arrange the capping electrode on the base electrode in a manner to cover the two-dimensional material body;

Fixing and sealing the first area of the base electrode and the first area of the capping electrode in a vacuum environment includes: connecting the base electrode, the two-dimensional material body and the capping electrode. The combined structure is placed in a vacuum environment, and the first area of the base electrode and the capping electrode is soldered and sealed.

In one embodiment, both the base electrode and the capping electrode are tubular structures; and arranging the two-dimensional material body and the capping electrode in sequence on the base electrode includes:

positioning the two-dimensional material body in the second area of the base electrode;

Heating the capping electrode to a preset temperature to cause expansion and deformation of the capping electrode;

The capped electrode sleeve that has undergone expansion deformation is quickly cooled after being placed on the base electrode, or the capped electrode sleeve that has undergone expansion deformation is quickly placed on the cold base electrode to reduce the A two-dimensional material body is wrapped between the capping electrode and the base electrode.

The heating body according to the above embodiment includes a base electrode, a capping electrode and a two-dimensional material body. The base electrode and the capping electrode are insulated from each other; the two-dimensional material body is vacuum sealed between the capping electrode and the base electrode, and is connected to the base electrode and the base electrode respectively. The capping electrode and the base electrode are in electrical contact. On the one hand, by utilizing the electrical characteristics of the two-dimensional material body such as its high resistance value in the thickness direction, small impulse current at startup, and the electrical contact relationship between the base electrodes, the heat generated by the two-dimensional material body can be directly and quickly transferred to the ground. It is transferred to the base electrode or the capped electrode to realize the external heating or heating function of the heating body, effectively improving the thermoelectric conversion efficiency of the heating body; on the other hand, the two-dimensional material body is arranged inside the heating body in a vacuum-sealed form, which can prevent secondary The two-dimensional material body is oxidized when working at high temperature, and can make full use of its characteristics of strong heat resistance and stability in a vacuum atmosphere, so that the two-dimensional material body or the heating body as a whole can exert its unique electrical and thermal advantages for a long time, providing The heating element is stable and reliable and provides guarantee for long-term high-temperature applications.

Description of the drawings

Figure 1 is a schematic cross-sectional structural diagram (1) of a heating body according to an embodiment.

Figure 2 is a schematic cross-sectional structural diagram (2) of a heating body according to an embodiment.

Figure 3 is a schematic cross-sectional structural diagram (3) of a heating body according to an embodiment.

Figure 4 is a schematic cross-sectional structural diagram (4) of a heating body according to an embodiment.

Figure 5 is a schematic cross-sectional structural diagram (5) of a heating body according to an embodiment.

Figure 6 is a schematic cross-sectional structural diagram (6) of a heating body according to an embodiment.

Figure 7 is an exploded schematic structural diagram of a heating body according to an embodiment.

Figure 8 is a schematic structural diagram of the compensation structure and the capping electrode of the heating body before molding according to an embodiment.

Figure 9 is a schematic structural diagram of the heating body according to an embodiment between the compensation structure and the capping electrode after molding.

Figure 10 is a schematic cross-sectional structural diagram (7) of a heating body according to an embodiment.

Figure 11 is a schematic cross-sectional structural diagram (8) of a heating body according to an embodiment.

Figure 12 is an exploded schematic structural diagram of a heating body according to an embodiment.

Figure 13 is a flow chart of a heating body preparation method according to an embodiment.

In the picture:

10. Base electrode; 10a, accommodation chamber; 10b, compensation structure; 20. capping electrode; 30. two-dimensional material body; 40. electrically insulating material layer; 50. first conductive layer; 60. second conductive layer; a , extension.

Detailed ways

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments use associated similar element numbers. In the following embodiments, many details are described in order to make the present application better understood. However, those skilled in the art can readily recognize that some of the features may be omitted in different situations, or may be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is difficult to describe these in detail. The relevant operations are not necessary, and they can fully understand the relevant operations based on the descriptions in the instructions and general technical knowledge in the field.

Additionally, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. At the same time, each step or action in the method description can also be sequentially exchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the description and drawings are only for clearly describing a certain embodiment, and do not imply a necessary sequence, unless otherwise stated that a certain sequence must be followed.

The serial numbers assigned to components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connection" and "connection" mentioned in this application include direct and indirect connections (connections) unless otherwise specified.

Two-dimensional materials usually refer to a type of material in which electrons can move freely only on the nanometer scale (1-100nm) in two dimensions, such as graphite or graphene; this two-dimensional material has the ability to conduct heat quickly. , small impulse current at startup, and other unique thermal and electrical characteristics. Although two-dimensional materials have been used in some optoelectronic device fields, they have not yet been stably and reliably used in the field of heating without burning.

In the heating body provided by this application, the two-dimensional material body is packaged between the base electrode and the capping electrode in a vacuum-sealed form; on the one hand, with the help of the electrical contact relationship between the two-dimensional material body and the base electrode and the capping electrode, through Applying a potential difference to the base electrode and the capping electrode can cause the two-dimensional material body to rapidly heat or heat, thereby directly and quickly transferring heat to the base electrode or the capping electrode, thereby effectively improving the thermoelectric conversion efficiency of the heating body.

On the other hand, since the two-dimensional material body is encapsulated in a vacuum seal between the base electrode and the capping electrode, the base electrode and the capping electrode can effectively protect the two-dimensional material body to prevent the two-dimensional The material body is oxidized by oxidizing gases such as air when working at high temperatures, thereby ensuring that the two-dimensional material body can exert its unique thermal and electrical advantages stably for a long time, thereby improving the heat resistance of the heating body, long-term working stability and Reliability is effectively improved.

Referring to Figures 1 to 12, embodiments of the present application provide a heating body that can be used as an electric heating device in heat-not-burn atomization devices, household electric heating devices and other related devices; the heating body includes a base electrode 10, The capping electrode 20, the two-dimensional material body 30, and other components as needed will be described in detail below.

Please refer to Figures 1 to 12. The base electrode 10 and the capping electrode 20 can adopt different structural forms according to the design of the overall contour of the heating body, the application scenario of the heating body, etc.; for example, please refer to Figures 2 to 6. The base electrode 10 The capping electrode 20 adopts a tubular structure (that is, a hollow pipe), and the capping electrode 20 adopts a tubular structure or a sheet structure, and the capping electrode 20 is placed on the outer peripheral side of the base electrode 10 or stacked on the outer peripheral wall of the base electrode 10. The structure forms a tubular heating body; for another example, please refer to Figure 10. The base electrode 10 adopts a columnar structure (or needle-like structure), the capping electrode 20 adopts a tubular structure or a sheet structure, and the capping electrode 20 is placed on the base electrode. The outer peripheral side of 10 or the outer peripheral wall stacked on the base electrode can be configured to form a needle-shaped heating body; for another example, please refer to Figure 1, the base electrode 10 and the capping electrode 20 both adopt a sheet structure, and the two are mutually connected. The stacked arrangement can form a plate-shaped heating body.

Please refer to Figures 1 to 12. The two-dimensional material body 30 is mainly used as an electric heating element in the heating body, and can be graphite, graphene, molybdenum sulfide, tungsten sulfide, cubic boron arsenide, boron nitride, or phosphide. Membrane sheet structure of boron, tantalum nitride and other materials; during specific implementation, the resistance value of the two-dimensional material body 30 in the thickness direction can be at least 10 times, a hundred times or a thousand times greater than the resistance value in the length direction or width direction. The above two-dimensional material can also be understood as the inter-layer resistance of the two-dimensional material body 30 is at least 10 times or more than a hundred times greater than the intra-layer resistance. The two-dimensional material body 30 is arranged between the base electrode 10 and the capping electrode 20 , and the two surfaces of the two-dimensional material body 30 that are opposite in the thickness direction are electrically connected to the base electrode 10 and the capping electrode 20 on the corresponding side respectively. Contact arrangement (for example, electrical contact is achieved in a tightly fitting manner, or electrical contact between the two-dimensional material body 30 and the electrode is achieved through a provided conductive layer).

By connecting the base electrode 10 and the capping electrode 20 to the power supply respectively, the heating body and the power supply can form a complete electrical circuit, because the base electrode 10 and the capping electrode 20 are located in the thickness direction of the two-dimensional material body 30 In this way, after the heating body is energized, the current will flow along the thickness direction of the two-dimensional material body 30 to exert the high resistance characteristics of the two-dimensional material body 30 in the thickness direction, thereby making the two-dimensional material body 20 Rapidly generate heat or heat, and transfer heat to the base electrode 10 and/or the capping electrode 20 . Among them, as for the tubular or plate-shaped heating body, the base electrode 10 or the capping electrode 20 can be finally used to complete the heating or atomization of the medium to be processed (such as aerosol-generating matrix, airflow, etc.); as for the needle-shaped heating body, As for the heating body, the capping electrode 20 can finally be used to complete heating or atomization of the medium to be processed.

For ease of distinction and description, the side facing each other between the base electrode 10 and the capping electrode 20 is defined as a joint surface, and the joint surface is divided into functional areas to form a first region and a second region; that is to say, the base electrode Both the joint surface of 10 and the joint surface of the capping electrode 20 have or are divided into a first region and a second region; wherein, the capping electrode 20 and the base electrode 10 establish a structural connection relationship with each other in the first region, and the second region The region can be understood as a region corresponding to the two-dimensional material body 30 . For example, when both the base electrode 10 and the capping electrode 20 adopt a tubular structure, the base electrode 10 is used as the description object. The first region may be the portion of the outer circumferential surface of the base electrode 10 located at both axial ends, or it may be As shown in Figure 11, the end portions of the two axial ends of the base electrode 10; for example, the base electrode 10 and the capping electrode 20 both adopt a sheet structure, and the first area of the two refers to the distribution around the two-dimensional material body 30 or the area portion located at the periphery of the geometric outline of the two-dimensional material body 30 .

By performing a vacuum process between the capping electrode 20 and the base electrode 10 and sealing and fixing the first area of the capping electrode 20 with the first area of the base electrode 10, etc., the two-dimensional material body 30 is finally in a vacuum sealed form. It is encapsulated between the second area of the base electrode 10 and the second area of the capping electrode 20, and ensures that the two-dimensional material body 30 can maintain electrical contact (such as close contact) with the base electrode 10 and the capping electrode 20 respectively. .

During specific implementation, the areas where the base electrode 10 and the capping electrode 20 are in direct contact with each other are electrically insulated in advance, for example, an electrically insulating material layer is provided in the first area of the base electrode 10 and/or the first area of the capping electrode 20 40, or the first region of at least one of the base electrode 10 and the capping electrode 20 is made of an electrically insulating material; not only can it prevent short circuits due to direct contact between the base electrode 10 and the capping electrode 20, but also ensure that the base electrode 10 and the capping electrode 20 are in direct contact with each other. The capping electrode 20 is electrically connected through the two-dimensional material body 30 .

Then, the two-dimensional material body 30 and the capping electrode 20 are placed on the base electrode 10 in sequence, so that the two-dimensional material body 30 is located between the capping electrode 20 and the second area of the base electrode 10; wherein, the two-dimensional material body 30 The number may be one or more, and the plurality of two-dimensional material bodies 30 are spacedly arranged on the base electrode 10 (in other words, the base electrode 10 and the capping electrode 20 may each have a plurality of second spaced-apart arrangement). area).

By means of vacuum welding, vacuum fixing and other process means, the first area of the capping electrode 20 and the first area of the base electrode 10 are sealed and fixed, so that the two-dimensional material body 30 can be vacuum sealed or vacuumed under the action of the pressure difference. Encapsulated between the capping electrode 20 and the base electrode 10, and ensuring that the two opposite surfaces of the two-dimensional material body 30 in the thickness direction maintain, for example, close electrical contact with the base electrode 10 and the capping electrode 20 on the corresponding side. fit relationship.

On the one hand, by utilizing the characteristics of the two-dimensional material body 30 having a high resistance value along its thickness direction and a small impulse current at startup, the two-dimensional material body 30 is ohmic heated by applying a potential difference to the base electrode 10 and the capping electrode 20. The two-dimensional material body 30 generates heat or causes heat and quickly reaches the upper limit of the heating temperature; at the same time, with the help of the electrical contact relationship between the two-dimensional material body 30 and the base electrode 10 and the capping electrode 20, it is ensured that the heat can be quickly transferred to the base electrode 10 and/or capping the electrode 20, thereby ultimately realizing the external heating or heating function of the heating body.

On the other hand, using the base electrode 10 and the capping electrode 20 to directly vacuum-encapsulate and protect the two-dimensional material body 30 can not only prevent the two-dimensional material body 30 from being oxidized when operating at high temperatures, but also allow the two-dimensional material body 30 to operate in a vacuum. Or it has the characteristics of strong heat resistance and stability under a reducing atmosphere, so that the two-dimensional material body 30 and even the heating body as a whole can exert its unique thermal and electrical advantages for a long time, ensuring that the heating body can be stable, reliable and used for long-term high temperature applications.

It should be noted that, based on the feature that the base electrode 10 and the capping electrode 20 can be selectively electrically insulated, the first region and the second region of one of them may not be divided or set in advance; for example, By setting the placement position of the two-dimensional material body 30 on the base electrode 10 in advance, the first area and the second area of the base electrode 10 can be divided in advance; after the capping electrode 20 is arranged on the base electrode 10 and covers the two-dimensional material After the body 30 is formed, the region corresponding to the two-dimensional material body 30 in the joint surface of the capped electrode 20 can be understood as the second region of the capped electrode 20, and other regions in the joint surface can naturally be understood as the second region of the capped electrode 20. Cover the first area of electrode 20 .

In one embodiment, please refer to Figures 2 to 4. The heating body has a tubular structure. Specifically, the base electrode 10 and the capping electrode 20 are both made of conductive materials and have a roughly tubular structure. The base electrode 10 has a The outer diameter is slightly smaller than the inner diameter of the capping electrode 20, and the wall thickness of the capping electrode 20 is set to be smaller than the wall thickness of the base electrode 10; wherein, the base electrode 10 can be an oxygen-free copper tube and a double-layer outer layer of oxygen-free copper. Processing and production of metal composite pipes, pure aluminum or aluminum alloy pipes, double-layer metal composite pipes with pure aluminum or aluminum alloy outer layers, stainless steel pipes (such as SUS430, SUS444, SUS304, SUS316 and other series of stainless steels), Kovar alloy pipes and other pipes Forming; the capping electrode 20 can be made of thin-walled copper tubes, thin-walled copper tubes with outer coatings (such as nickel, gold, iridium, etc.), thin-walled Kovar alloy tubes, thin-walled pure aluminum or aluminum alloy tubes, outer coatings (such as Thin-walled pure aluminum or aluminum alloy tubes such as nickel, gold, silver, iridium, etc.), thin-walled titanium alloy tubes, thin-walled stainless steel tubes (such as SUS430, SUS444, SUS304, SUS316 and other series of stainless steel) are made and formed.

In terms of the overall structural structure of the heating body, the capping electrode 20 is coaxially placed on the outer peripheral side of the base electrode 10. The outer peripheral surface or outer wall surface of the base electrode 10 is the joint surface of the base electrode 10. The inner surface of the capping electrode 20 is The peripheral surface or inner wall surface is the joint surface of the capping electrode 20; the capping electrode 20 and the base electrode 10 are sealed and fixedly connected at the circumferential surfaces at both axial ends of the capping electrode 20 and the base electrode 10, and one or more two-dimensional material bodies distributed at intervals 30 is vacuum sealed or encapsulated between the two.

During specific implementation, the two-dimensional material body 30 can be positioned in the second area of the outer peripheral surface of the base electrode 10 in advance, and then the capping electrode 20 is placed on the base electrode 10; by removing the gap between the base electrode 10 and the capping electrode 20 The air between the capping electrode 20 and the capping electrode 20 can take advantage of the relatively thin wall thickness of the capping electrode 20 to cause the capping electrode 20 to collapse under the pressure difference, thereby pressing the two-dimensional material body 30 tightly between the capping electrode 20 and the capping electrode 20. between the base electrodes 10; and then by sealing and fixing the peripheral portions of the base electrode 10 and the capping electrode 20 at both axial ends, the vacuum sealing package of the two-dimensional material body 30 can be finally realized.

Of course, the two-dimensional material body 30 can also be completely covered between the peripheral surfaces of the base electrode 10 and the capping electrode 20. Please refer to FIG. The extension part a extending outward, or the extension part a extending radially inward is provided at the fractures at both axial ends of the capping electrode 20; use the extension part a to connect with the corresponding port of the base electrode 10 or the capping electrode 20 Due to the resisting relationship between the surfaces, the two-dimensional material body 30 is finally vacuum sealed between the base electrode 10 and the capping electrode 20 .

In another embodiment, please refer to FIGS. 5 and 6 , the outline shape of the base electrode 10 is generally a tubular structure of conductive material, and the outline shape of the capping electrode 20 is generally a plate-like or sheet-like structure, such as a foil of conductive material. The sheet; the capping electrode 20 is sealed and fixed to a local area of the outer peripheral surface of the base electrode 10 in a form of covering the two-dimensional material body 30 . It can be understood that at this time, the first area of the base electrode 10 can be other areas on its outer peripheral surface except the area covered by the two-dimensional material body 30 (see FIG. 5 for details), or it can be the center of its outer peripheral surface facing the seal. A partial area of the first area of the cap electrode 20 (see FIG. 6 for details); that is to say, the area of the cap electrode 20 located outside the geometric outline of the two-dimensional material body 30 is its first area and is connected with the outer surface of the base electrode 10 The wall is sealed and fixed.

During specific implementation, the number of capping electrodes 20 and two-dimensional material bodies 30 can be set to multiple, and the plurality of capping electrodes 20 and their corresponding two-dimensional material bodies 30 are arranged at different positions on the peripheral surface of the base electrode 10 .

In one embodiment, please refer to Figures 1, 7 and 12. The heating body has a plate-like structure. Specifically, the outline shapes of the base electrode 10 and the capping electrode 20 are generally in the shape of a plate or sheet of conductive material. structure, for example, the base electrode 10 is a plate with a preset thickness, and the capping electrode 20 is a foil sheet with a thickness smaller than the base electrode 10; the two-dimensional material body 20 can be arranged on one side or both sides of the base electrode 10, and the capping electrode 20 is a foil sheet with a thickness smaller than that of the base electrode 10. The cover electrode 20 is sealed and fixed to the base electrode 10 in a form of covering the two-dimensional material body 30 .

In one embodiment, please refer to FIGS. 1 to 12 , the first region of the base electrode 10 and/or the capping electrode 20 is made of electrically insulating material, and the second region of the base electrode 10 and/or the capping electrode 20 is made of conductive material. Materials; for example, the base electrode 10 is made of a conductive material such as metal or alloy, the first area of the capping electrode 20 is made of an electrically insulating material, and the second area is made of a conductive material; thus, also It is possible to prevent short circuits caused by direct contact between the base electrode 10 and the capping electrode 20 and at the same time ensure that the base electrode 10 and the capping electrode 20 are electrically connected through the two-dimensional material body 30 .

In other embodiments, the base electrode 10 may also adopt a needle-shaped structure, and accordingly, the capping electrode 20 may adopt a tubular structure or a sheet-like structure, thereby forming a needle-shaped heating body; for details, please refer to the aforementioned embodiments. No further details will be given.

In one embodiment, please refer to Figures 7 and 12 in combination with Figures 1 to 6 and Figures 10 and 11. The second area of the base electrode 10 is provided with a holding chamber 10a, which is mainly used to hold and position a corresponding two-dimensional Material body 30. Specifically, a groove structure with the same or substantially the same outline shape as that of the two-dimensional material body 30 can be provided in the second region of the base electrode 10 (it can be recessed on the surface of the base electrode 10 or can protrude from the base electrode). 10) to be used as a holding chamber 10a; during the preparation process of the heating body, the holding chamber 10a is used to hold at least part of a corresponding two-dimensional material body 30 (for example, a part of the two-dimensional material body 30 is embedded in the holding chamber 10a). inside the chamber 10a, and the other part protrudes from the joint surface of the base electrode 10), so that the two-dimensional material body 30 is pre-positioned and arranged on the base electrode 10; then the capping electrode 20 is arranged and subsequent vacuuming and sealing are performed. , a structure in which the base electrode 10, the two-dimensional material body 30 and the capping electrode 20 are vacuum-sealed and bonded together can be formed.

In other embodiments, based on the selection of the heating element preparation process, the accommodation chamber 10a can also be provided in the second area of the capping electrode 20 individually or simultaneously, which will not be described again here.

Referring to FIGS. 1 to 12 , in an embodiment in which both the base electrode 10 and the capping electrode 20 are made of conductive materials, the first region of the base electrode 10 is provided with an electrically insulating material layer 40 , which is mainly used for connecting the base electrode 10 and the capping electrode. There is electrical insulation between the cover electrodes 20; the electrical insulating material layer 40 can be based on the different specific material types of the base electrode 10 and the cap electrode 20, using an aluminum nitride layer, a diamond layer, a glass ceramic layer, an aluminum oxide layer, Chromium oxide layer, etc.; and, depending on the specific material of the electrical insulating material layer 40, it can be formed on the base electrode 10 by sputtering, spraying, printing, nitriding, oxidation, etc. In addition, in an embodiment where the accommodation chamber 10a is provided, the electrically insulating material layer 40 may be extended to the cavity wall of the accommodation chamber 10a so that the front and back surfaces of the two-dimensional material body 30 are directly in contact with the capping electrode 20 and the base electrode. 10 are in close contact, thereby ensuring that the parts of the base electrode 10 and the capping electrode 20 that may be in direct contact can be insulated from each other.

In another embodiment, based on the preparation process of the heating body, the first region of the capping electrode 20 may be electrically insulated separately or simultaneously to form a corresponding electrically insulating material layer 40 .

In one embodiment, please refer to FIGS. 8 and 9 . The first area of the base electrode 10 is also provided with a compensation structure 10 b . The compensation structure 10 b may be one or more spaced arrangements recessed in the joint surface of the base electrode 10 . The groove structure may also be one or more spaced-apart convex structures protruding from the joint surface of the base electrode 10 . On the one hand, the compensation structure 10b can effectively increase the direct contact area between the base electrode 10 and the capping electrode 20, ensuring that the base electrode 10 and the capping electrode 20 can be firmly sealed and fixed; on the other hand, the compensation structure 10b can effectively increase the sealing area. The deformation produced by the cap electrode 20 plays a compensatory role. Specifically, during the process of vacuum welding or releasing the vacuum, the cap electrode 20 will collapse and deform due to the pressure difference and fit into the compensation structure 10b (for example, partially enter the recess). (in the compensation structure 10b in the form of a groove), so that the capping electrode 20 can fully wrap and adhere to the two-dimensional material body 30, similar to a heat shrinkable film.

During specific implementation, taking the compensation structure 10b in the form of a groove as an example, the total groove area of the compensation structure 10b depends on the spacing difference between the capping electrode 20 and the base electrode 10. For example, the base electrode 10 (including an electrically insulating material layer The greater the difference between the outer diameter of 40) and the inner diameter of the capping electrode 20, the larger the total tank area of the compensation structure 10b; thus, it is ensured that the capping electrode 20 and the base electrode 10 are fully contacted and sealed and fixed.

In one embodiment, please refer to FIG. 12 in combination with FIGS. 1 to 11 , the two-dimensional material body 30 and the base electrode 10 and the capping electrode 20 can also be electrically contacted in a non-direct contact bonding manner. Specifically, In other words, a first conductive layer 50 is provided between the capping electrode 20 (specifically its second region) and the two-dimensional material body 30 to achieve electrical contact between the capping electrode 20 and the two-dimensional material body 30; A second conductive layer 60 is provided between the base electrode 10 (specifically its second region) and the two-dimensional material body 30 to achieve electrical contact between the base electrode 10 and the two-dimensional material body 30; wherein, the two-dimensional The material body 30 may be a single-layer or multi-layer diaphragm sheet structure made of a single two-dimensional material, or may be a multi-layer diaphragm sheet structure formed by stacking different two-dimensional materials; the first conductive layer 50 and the second conductive layer 60 may be formed on the surface of the two-dimensional material body 30, the capping electrode 20 or the base electrode 10 in the form of a coating; for example, the first conductive layer 50 and the second conductive layer 60 may be formed on Metal films (for example, metal films with high conductivity such as copper, gold, platinum, iridium, etc.) on both surfaces of the two-dimensional material body 30 in the thickness direction.

A close electrical contact relationship is established between the two-dimensional material body 30 and the capping electrode 20 (and/or the base electrode 10 ) by means of the first conductive layer 50 and the second conductive layer 60 to ensure ohmic conduction of the two-dimensional material body 30 Heating effect.

During specific implementation, depending on the structural form of the heating body, application scenarios, etc., the first conductive layer 50 and the second conductive layer 60 may use conductive materials with the same or different thermal conductivities, and may depend on whether the heating body is based on the base electrode 10 It is also based on the capping electrode 20 heating and atomizing the medium to be processed.

For example, when the entire heating body has a tubular structure and the base electrode 10 is used to heat or atomize the medium to be processed, the second conductive layer 60 may be a conductive material layer with high thermal conductivity (for example, a heat-conducting conductive material), a first conductive material layer, or a first conductive material layer. The layer 50 uses a conductive material layer with low thermal conductivity (such as an insulating conductive material) to enhance the heat transfer between the two-dimensional material body 30 and the base electrode 10 and the thermal insulation between the two-dimensional material body 30 and the capping electrode 20. The heat generated by the two-dimensional material body 30 is transferred to the base electrode 10 as much as possible, and then the base electrode 10 is used to heat or atomize the medium to be processed.

For example, when the heating body adopts a needle-shaped or plate-shaped structure as a whole, and the capping electrode 20 is used to heat or atomize the medium to be processed, the second conductive layer 60 can be a conductive material layer with low thermal conductivity, the first conductive material layer, or the first conductive material layer. The layer 50 uses a conductive material layer with high thermal conductivity, so that the heat generated by the two-dimensional material body 30 can be transferred to the capping electrode 20 as much as possible, and the capping electrode 20 can then be used to heat or atomize the medium to be processed.

It should be noted that in some embodiments, a protective material layer may also be provided on the surfaces of the base electrode 10 , the capping electrode 20 and the electrical insulating material layer 40 (especially the portions exposed to the heating body) to prevent the heating body from operating at high temperatures. Or be oxidized during contact with the medium; for example, for the tubular structure of the base electrode 10 and the capping electrode 20, an anti-oxidation protective layer can be plated on the inner wall surface of the base electrode 10 and the outer wall surface of the capping electrode 20, so as to Prevent oxidation and rust; for another example, if the capping electrode 20 adopts a foil sheet structure, an anti-oxidation protective film can be plated on the electrical insulating material layer 40 to prevent the electrical insulating material layer 40 from not being covered by the capping electrode 20 damaged.

Referring to Figure 13 and combined with Figures 1 to 12, this application also provides a method for preparing a heating body, which can be used to prepare the heating body of any of the aforementioned embodiments; the preparation method includes steps 100 to 500, which are described in detail below. .

Step 100: Select the base material of the base electrode 10 and the capping electrode 20, as well as the specific two-dimensional material body 30.

According to the specific application and structural form of the heating body, copper-based, aluminum-based, stainless steel-based, Kovar alloy-based and other pipes, plates or columns can be selected as the base material of the base electrode 10, and thin-walled pipes or foils of metal materials can be selected. The sheet serves as a base material for capping electrode 20 . A two-dimensional material film sheet with an interlayer resistivity that is 500-2000 times the intra-layer resistivity can be selected as the two-dimensional material body 30; for example, the interlayer resistivity of a molybdenum sulfide nanofilm sheet is approximately its intra-layer resistivity. 2200 times, and the interlayer resistivity of the graphite film sheet is about 500 times its intralayer resistivity.

Specifically, taking the preparation of a heating body that can reach a long-term operating temperature of 400°C as an example, some physical parameters of the two-dimensional material body 30 can be selected or configured with reference to Table 1.

Step 200: Set the accommodation chamber 10a in the second region of the base electrode 10 base material and/or the capping electrode 20 base material.

For example, a groove structure with the same or substantially the same outline shape as that of the two-dimensional material body 30 can be provided in a preset area (ie, the second area) of the outer peripheral surface of the base electrode 10 through machining or other process means to form a groove structure. Accommodating chamber 10a; in order to ensure the installation space of corresponding components or material layers, the size of the accommodating chamber 10a can be slightly larger than the size of the two-dimensional material body 30; to allow the two-dimensional material body 30 to be inserted into the two-dimensional material body after being embedded in the accommodating chamber 10a. There is a small gap between 30 and the side wall of the accommodation chamber 10a.

At the same time, several groove structures can also be provided with the first area of the outer peripheral surface of the base electrode 10 to form the compensation structure 10b.

Step 300: Electrically insulating the first region of the base electrode 10 and/or the first region of the capping electrode 20.

In order to prevent the base electrode 10 and the capping electrode 20 from being short-circuited due to direct contact, resulting in damage to the heating element, failure of the two-dimensional material body 30 to heat or poor heating effect, etc., the base electrode 10 and the capping electrode 20 need to be Areas/parts that are in direct contact with each other are electrically insulated.

For example, the bottom surface of the accommodation chamber 10a of the base electrode 10 can be protected or shielded in advance, and then the electrical insulating material can be prepared or fixed on the base by sputtering, spraying, printing, nitriding, oxidation, etc. On the electrode 10, an electrically insulating material layer 40 is formed on the base electrode 10; or the first region of the base electrode 10 and/or the first region of the capping electrode 20 is made of electrically insulating material.

Step 400: Arrange the two-dimensional material body 30 and the capping electrode 20 on the base electrode 10 in sequence, so that the two-dimensional material body 30 is located between the base electrode 10 and the second region of the capping electrode 20.

Specifically, the two-dimensional material body 30 can first be positioned and placed in the second area of the base electrode 10 (for example, inserted into the corresponding accommodation chamber 10 a), and then placed in the first area of the base electrode 10 and/or the capping electrode 20 The brazing solder is placed at the preset position of the area (ie, the position to be welded), and finally the capping electrode 20 is nested or stacked on the base electrode 10 to cover the two-dimensional material body 30 .

Among them, as for the brazing solder, it can be prepared at the position to be welded by dispensing, screen printing, spraying or other suitable methods, or it can be prefabricated at a specific position in the first area of the capping electrode 20, or it can be A sheet that can be placed directly between the base electrode 10 and the first area of the capping electrode 20 .

Wherein, if the base electrode 10 and the capping electrode 20 both adopt a tubular structure, a hot air gun or a heating device can be used to heat the capping electrode 20 to a preset temperature (for example, 50-200°C), so that the capping electrode 20 Expansion and deformation occur due to heating; then the capping electrode 20 is placed on the base electrode 10 and then quickly cooled, or is quickly placed on the cold base electrode 10, so that the two-dimensional structure can be transformed into a two-dimensional structure through the cooling shrinkage deformation of the capping electrode 20. The material body 30 covers and is bonded between the capping electrode 20 and the base electrode 10 .

Step 500, fix and seal the first area of the base electrode 10 and the first area of the capping electrode 20 in a vacuum environment to vacuum seal the two-dimensional material body 30 between the base electrode 10 and the capping electrode 20, and The two-dimensional material body 30 is in close contact with the base electrode 10 and the capping electrode 20 respectively.

For example, the combined structure of the base electrode 10, the two-dimensional material body 30, and the capping electrode 20 can be placed in a vacuum water-cooled vacuum soldering furnace with an ultimate vacuum degree of 10*10 ^-3 Pa to 8*10 ^-4 Pa. , after drying, vacuuming, vacuum sintering, furnace cooling and other processes, the vacuum brazing process in a water-cooled vacuum soldering furnace is finally completed.

For example, the combined structure of the base electrode 10, the two-dimensional material body 30, and the capping electrode 20 can also be placed in a vacuum container with an ultimate vacuum degree of 10*10 ^-3 Pa to 8*10 ^-4 Pa. Drying, vacuuming, laser welding, cooling, annealing and other processes finally complete the laser welding in the vacuum container.

It should be noted that the entire welding process or at least the second half of the process should be performed in a vacuum state.

Based on the above preparation method, the two-dimensional material body 30 can be directly vacuum sealed or packaged inside the heating body (that is, between the base electrode 10 and the capping electrode 20 ) to ensure that the two-dimensional material body 30 can maintain good electrical connection with the electrodes. The contact relationship allows the two-dimensional material body 30 or the heating body as a whole to exert its unique thermal and electrical advantages stably and reliably for a long time.

Please refer to Figures 1 to 12. This application also provides an atomization device that heats the medium to be atomized by baking, for example, so that the medium to be atomized can generate smoke or release volatile substances without burning. Heated non-burn atomizer. The atomization device includes a shell component, a heating body, a control component including a power supply module, and other functional components as needed; wherein, the heating body adopts the heating body of any of the aforementioned embodiments, and the base electrode of the heating body 10 and the capping electrode 20 are electrically connected to the power supply module respectively.

Applying a potential difference to the base electrode 10 and the capping electrode 20 with the help of the power supply module can cause the two-dimensional material body 30 to generate heat, and the heat can be directly and quickly transferred to the base electrode 10; in this way, the base electrode 10 can be used Either the capping electrode 20 directly heats and atomizes the medium to be atomized (such as solid drugs, spices, tobacco, etc.), or the airflow flowing through the base electrode 10 or the capping electrode 20 is heated to complete the atomization of liquid or semi-liquid state through the hot airflow. Heating and atomization of solid medium to be atomized.

During specific implementation, the housing assembly, control assembly and other related functional components of the atomization device can be selected and configured with reference to the existing technology, so they will not be described again here.

The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, several simple deductions, modifications or substitutions can be made based on the ideas of the present invention.

Claims (16)

1. A heating body, characterized in that it includes a base electrode, a capping electrode and a two-dimensional material body; wherein the capping electrode is arranged facing the base electrode, and the capping electrode and the base electrode are mutually exclusive. Each facing side has a first region and a second region, the first region of the capping electrode and the first region of the base electrode are electrically insulated from each other; the two-dimensional material body is vacuum sealed on the capping electrode Between the second region of the base electrode and the two surfaces of the two-dimensional material body opposite in the thickness direction thereof, they are in electrical contact with the capping electrode and the base electrode respectively. 2. The heating element according to claim 1, wherein the number of the two-dimensional material bodies is set to be multiple, and the plurality of two-dimensional material bodies are arranged at intervals between the base electrode and the cover. between electrodes. 3. The heating body according to claim 1, wherein the two-dimensional material body is made of graphite, graphene, molybdenum sulfide, tungsten sulfide, cubic boron arsenide, boron nitride, boron phosphide and nitride. Diaphragm structure made of at least one material from tantalum. 4. The heating body according to claim 1, wherein the resistance value of the two-dimensional material body in the thickness direction is at least 10 times greater than the resistance value in the length direction or width direction. 5. The heating body according to claim 1, characterized in that the second area of the base electrode and/or the second area of the capping electrode is provided with an accommodation chamber, and the accommodation chamber is used to accommodate the said At least part of a two-dimensional body of material. 6. The heating body according to claim 1, wherein the capping electrode and the base electrode are sealed and fixed in the first area by vacuum welding, so as to vacuum seal the two-dimensional material body in the first region. between the capping electrode and the second region of the base electrode. 7. The heating element according to claim 3, wherein a compensation structure is provided on a side of the base electrode facing the capping electrode, and the compensation structure is located in the corresponding first area, and the compensation structure The structure is used to compensate for the deformation of the capping electrode during vacuum welding. 8. The heating body according to claim 1, wherein the base electrode is a tubular structure or a columnar structure, and the capping electrodes are all tubular structures; wherein, the capping electrode sleeve is placed on the base body. The outer peripheral side of the electrode, and the axial end of the capping electrode and the axial end of the base electrode are electrically insulated and sealed with each other; or The base electrode is a tubular structure or a columnar structure, and the capping electrode is a sheet structure; wherein, the capping electrode is stacked on the outer wall surface of the base electrode and covers the two-dimensional material body on the Base electrode; the area of the capping electrode located outside the geometric outline of the two-dimensional material body and the outer wall surface of the base electrode are electrically insulated and sealed with each other; or Both the base electrode and the capping electrode have a sheet-like structure, the two-dimensional material body and the capping electrode are stacked on the base electrode in sequence, and the capping electrode and the base electrode are located at Areas outside the geometric outline of the two-dimensional material body are electrically insulated and sealed from each other. 9. The heating body according to claim 1, wherein the base electrode and the capping electrode are both made of conductive material, and at least the first region of the base electrode and/or the capping electrode The first region is provided with an electrically insulating material layer, and the electrically insulating material layer is used to provide electrical insulation between the base electrode and the capping electrode; or The first region of the base electrode and/or the first region of the capping electrode is made of electrically insulating material, and the second region of the base electrode and/or the second region of the capping electrode is made of conductive material. production. 10. The heating body according to claim 1, wherein a first conductive layer is disposed between the capping electrode and the two-dimensional material body to realize the connection between the capping electrode and the two-dimensional material body. Electrical contact between material bodies; a second conductive layer is provided between the base electrode and the two-dimensional material body to achieve electrical contact between the base electrode and the two-dimensional material body. 11. The heating body according to claim 10, wherein one of the first conductive layer and the second conductive layer is a conductive layer with low thermal conductivity, and the first conductive layer and the second conductive layer The other of the second conductive layers is a high thermal conductivity conductive layer. 12. An atomization device, characterized in that it includes a power supply module and the heating body according to any one of claims 1 to 11, and the base electrode and the capping electrode are respectively connected with the power supply module. Electrical connection settings. 13. A method for preparing a heating body according to claim 1, characterized in that it includes: electrically insulating the first region of the base electrode and/or the first region of the capping electrode; Arrange the two-dimensional material body and the capping electrode in sequence on the base electrode, so that the two-dimensional material body is located between the base electrode and the second region of the capping electrode; Fixing and sealing the first area of the base electrode and the first area of the capping electrode in a vacuum environment to vacuum seal the two-dimensional material body between the base electrode and the capping electrode and make the two-dimensional material body electrically contact with the base electrode and the capping electrode respectively. 14. The preparation method according to claim 13, wherein said electrically insulating the first region of the base electrode and/or the first region of the capping electrode includes: An electrically insulating material is fixed to the first region of the base electrode and/or the first region of the capping electrode by at least one of sputtering, spraying, printing, nitriding and oxidation to form electrical insulation. material layer; and / or Before electrically insulating the first region of the base electrode and/or the capping electrode, the method further includes: setting a holding chamber in the second region of the base electrode to accommodate the two-dimensional material. at least part of the body. 15. The preparation method of claim 13, wherein arranging the two-dimensional material body and the capping electrode on the base electrode in sequence includes: positioning the two-dimensional material body in the second area of the base electrode; Arrange brazing solder in a preset position of the first region of the base electrode and/or the first region of the capping electrode after electrical insulation; Arrange the capping electrode on the base electrode in a manner to cover the two-dimensional material body; Fixing and sealing the first area of the base electrode and the first area of the capping electrode in a vacuum environment includes: connecting the base electrode, the two-dimensional material body and the capping electrode. The combined structure is placed in a vacuum environment, and the first area of the base electrode and the capping electrode is soldered and sealed. 16. The preparation method according to claim 13, characterized in that both the base electrode and the capping electrode are tubular structures; the two-dimensional material body and the capping electrode are arranged sequentially on the The base electrode includes: positioning the two-dimensional material body in the second area of the base electrode; Heating the capping electrode to a preset temperature to cause expansion and deformation of the capping electrode; The capped electrode sleeve that has undergone expansion deformation is quickly cooled after being placed on the base electrode, or the capped electrode sleeve that has undergone expansion deformation is quickly placed on the cold base electrode to reduce the A two-dimensional material body is wrapped between the capping electrode and the base electrode.