WO2004074208A1 - Sintered magnetic oxide and high-frequency circuit component therefrom - Google Patents

Abstract

A sintered magnetic oxide whose 80% or more is occupied by Y-type hexagonal ferrite. The sintered magnetic oxide comprises, as main components, 5 to 17 mol%, in terms of CuO, of copper oxide, 57 to 61 mol%, in terms of Fe2O3, of iron oxide, 0 to 15 mol% of MO (MO is at least one member of NiO, ZnO and MgO, and the content of MO is above zero) and the balance of AO (AO is at least one member of BaO and SrO) and comprises, as an accessory component, bismuth oxide (Bi2O3), borosilicate glass, zinc borosilicate glass or bismuth borosilicate glass. Thus, the magnetic performance of the sintered magnetic oxide is highly excellent up to high-frequency bands of a few hundred MHz to GHz, and the content of hetero-phases other than the Y-type hexagonal ferrite is minimized. The firing for obtaining the sintered magnetic oxide can be effected 1000°C or below, especially around 900°C. There are further provided high-frequency circuit components from the sintered magnetic oxide.

Description

 Description Magnetic oxide sintered body and high-frequency circuit component using the same

 The present invention relates to a magnetic oxide sintered body used for high-frequency circuit components and a high-frequency circuit component using the same. Background art

 In recent years, demand for electronic components having high inductance and impedance in a high-frequency band has been increasing along with miniaturization and higher frequency of electronic devices. In order to obtain a small size and high inductance and impedance, it is desirable to produce a coil having a laminated structure in which a conductor is built in a magnetic material by a so-called printing method and a sheet method. By using a laminated structure, the number of turns of the coil can be increased, and the structure also becomes a closed magnetic circuit, so that high inductance and impedance can be obtained.

 In general, silver (Ag) is often used as a conductor material incorporated in a sintered body in consideration of electrical resistivity, melting point, and cost. Since the melting point of silver is 100 ° C. or less, a high sintering density is generally obtained as a magnetic material for a laminated structure even at 900 ° C. Ferrites have been used.

 However, the NiZn-based ferrite has a low magnetic anisotropy and causes natural resonance at a frequency of several hundred MHz, and cannot be used in the frequency band of GHz.

 An air-core coil using a non-magnetic material may be used as a high-frequency specification. However, using a non-magnetic material makes it difficult to obtain high inductance impedance.

On the other hand, the hexagonal ferrite has less magnetic anisotropy between the in-plane direction of the hexagonal plate-like crystal and the direction perpendicular to this plane, so that natural resonance is unlikely to occur, and up to the frequency band of GHz. It has the characteristic of having high magnetic permeability. However, in order to obtain desired sintering density and magnetic properties, it is necessary to raise the firing temperature. You.

 Attempts have been made at low temperatures to sinter hexagonal ferrite, which has a high formation temperature, by using a low-melting-point oxide at a temperature lower than the melting point of Ag, but the rate of soft magnetic phase formation is low. However, it was difficult to fully utilize the magnetic characteristics of hexagonal ferrite.

 Under such circumstances, the inventors of the present application have already disclosed in Japanese Patent Application Laid-Open No. 2002-260913 and Japanese Patent Application Laid-Open No. It has good magnetic properties up to a high frequency band of several hundred MHz to GHz and can be used, and it does not contain foreign phases other than Y-type hexagonal ferrite as much as possible. We have proposed a magnetic oxide sintered body that can be fired in the vicinity and a high-frequency circuit component using this.

 However, in the technical field according to the present application, it is desired to further improve the magnetic properties without satisfying the above proposals. In addition to the fact that the present invention can be fired at a low temperature, the magnetic permeability in a high frequency band is further improved. The main purpose is to improve

 By further improving the magnetic permeability in the high frequency band, for example, (i) a higher inductance can be obtained when used as an inductance component, and (ii) a case where it is used as a noise filter component. In addition, high impedance characteristics can be obtained. Disclosure of the invention

 Under such circumstances, the invention of the first group and the invention of the second group of the present invention have been invented. The purpose of the invention is to solve the above-mentioned problems and to provide several hundred MHz to GHz. Magnetic oxide with extremely good magnetic permeability up to the high-frequency band, and containing as little as possible other phases than the Y-type hexagonal ferrite as low as 100 ° C or less, and especially sinterable at around 900 ° C An object of the present invention is to provide a sintered body and a high-frequency circuit component using the same.

In order to solve such a problem, the present inventors have further intensively studied the configuration of the main structure proposed above, and found that the magnetic permeability was further improved. The present inventors have found a suitable composition range that can achieve the above, and have conceived the invention of the first group and the invention of the second group of the present invention.

 (Invention of the first group)

That is, in the invention of the first group, the present invention relates to a magnetic oxide sintered body occupied by 80% or more of a Y-type hexagonal ferrite, wherein the magnetic oxide sintered body is used as a main component. 5 to 1 7 mole% of copper oxide in C u O terms, 5 7-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of the MO 0 to 1 5 mol% (MO is, n i 0, Z n 0, at least one of MgO, except for MO content of 0, and the remaining 5 as AO (AO is at least one of BaO or SrO), and bismuth oxide ( B i ₂ 0 ₃₎ and configured to be contained 0. 5-7 wt-%.

The present invention also relates to a magnetic oxide sintered body occupied by 80% or more of 丫 -type hexagonal ferrite, wherein the magnetic oxide sintered body contains copper oxide as a main component in terms of CuO. 5-1 7 mol%, 57-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of 1/10 0-1 5 molar% (MO is the n i 0, Z n 0, M g O It contains at least one element, excluding MO content of 0) and the remainder as AO (AO is at least one element of BaO or SrO), and contains borosilicate glass, zinc borosilicate glass, or bismuth glass as an auxiliary component. It is configured to contain 5-7 wt%.

 As a preferred embodiment of the present invention, the calcination temperature in the production of the magnetic oxide sintered body is 850 ° C to 10000 ° C.

The present invention is also a high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, wherein the magnetic oxide sintered body is a Y-type hexagonal ferrite of 80% or more. It occupied, and magnetic sintered oxide, as a main component, 5 to 7 mol% of copper oxide CuO conversion calculation, 57-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of the MO 0 to 15 mol% (MO is at least one of NiO, ZnO, and MgO, except for MO content of 0), and the remainder is AO (AO is at least BaO or SrO includes as a one), configured to be contained 0. 5-7 wt-% of bismuth oxide (B i ₂ 0 ₃₎ as a sub-component.

Further, the present invention is a high frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, wherein the magnetic oxide sintered body is 80% hexagonal ferrite. Occupied more, and magnetic sintered oxide, 57-61 mol% copper oxide as the main component 5-1 7 mol% in terms of CuO, an iron oxide in F e ₂ 0 ₃ in terms of, 1 ^ 10 0 to 15 mol% (MO is at least one of Ni0, ZnO and MgO, excluding MO content 0), and the remaining 3 ^ is AO (AO is BaO or SrO And at least 0.5% by weight of borosilicate glass, zinc borosilicate glass, or bismuth glass as an auxiliary component.

 As a preferred embodiment of the present invention, the calcination temperature in the production of the magnetic oxide sintered body is 850 ° C to 10000 ° C.

 In a preferred embodiment of the present invention, the conductor is mainly composed of silver (Ag).

(Second group invention)

Further, in the invention of the second group, the present invention relates to a magnetic oxide sintered body occupied by 80% or more of a Y-type hexagonal ferrite, wherein the magnetic oxide sintered body has a main component 0-1 cobalt oxide with Co 0 calculated as. 9 mol% (content 0 is excluded), 5 to 7 mol% of the acid copper in terms of CuO, an iron oxide in F e ₂ 0 ₃ in terms of 57 to 61 Mol%, MO is 0 to 15 mol% (MO is at least one of Ni0, Zn0, MgO, excluding MO content 0), and the rest is AO (AO is includes as a small tool with one) of BaO or S r 0, configured such that the Sani匕bismuth as an accessory component (B i ₂ 0 ₃₎ containing 0. 5~7w t%.

The present invention also relates to a magnetic oxide sintered body occupied by 80% or more of a Y-type hexagonal ferrite, wherein the magnetic oxide sintered body contains acid oxide as a main component. in O terms from 0 to 1.9 mol% (content 0 is excluded), 5 to 7 mol% of copper oxide in terms of CuO, 57 to 61 mol% of iron oxide in F e ₂ 0 ₃ in terms of the MO 0 to 1 5 mol% (MO is at least one of Ni0, ΖηΟ, MgO, excluding M0 content 0), and the remainder is AO (AO is at least one of BaO or SrO) It is configured to contain 0.5 to 7 wt% of borosilicate glass, zinc borosilicate glass, or bismuth glass as a sub-component.

As a preferred embodiment of the present invention, a calcination temperature in the production of the magnetic oxide sintered body Is between 850 ° C and 10000 ° C.

Further, the present invention is a high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, wherein the magnetic oxide sintered body is a Y-type hexagonal ferrite of 80% In addition, the magnetic oxide sintered body contains cobalt oxide as a main component in an amount of 0 to 1.9 mol% in terms of Co0 (excluding a content of 0), and copper oxide in an amount of 5 to 9 in terms of CuO. 1 7 molar%, 57 to 61 mol% of iron oxide in F e ₂ 0 ₃ in terms of, 0-1 5 mol% of MO (MO is, N i 0, Z nO, at least one of MgO, MO the content of 0 is excluded), AO (AO is the remainder, wherein in at least one) of BaO or S and rO, containing 0. 5-7 wt-% of bismuth oxide (B i ₂ 0 ₃₎ as a byproduct fraction It is configured so that

Further, the present invention is a high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, wherein the magnetic oxide sintered body is a Y-type hexagonal ferrite of 80% In the magnetic oxide sintered body, cobalt oxide as a main component is 0 to 1.9 mol% in terms of Co0 (excluding content 0), and copper oxide is 5 to 17 in terms of CuO. molar%, 57-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of the MO 0 to 1 5 mol% (MO is, N i 0, Z nO, at least one MgO, containing the MO Rate excluding 0) and the remainder as AO (AO is at least one of BaO and SrO), containing 0.5 to 7 wt% of borosilicate glass, zinc borosilicate glass or bismuth glass as a by-product It is configured to be.

 As a preferred embodiment of the present invention, the calcination temperature in the production of the magnetic oxide sintered body is 850 ° C to 10000 ° C.

 In a preferred embodiment of the present invention, the conductor is mainly composed of silver (Ag). BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic drawing of the inductance element (high-frequency circuit component) used in the example. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the magnetic oxide sintered body of the present invention will be described in detail.

 (1) Description of the first invention group

 Since the magnetic oxide sintered body in the first invention group of the present invention is a ceramic sintered body, it can be manufactured by an ordinary ceramic manufacturing process.

The magnetic oxide sintered body according to the first invention group of the present invention comprises copper oxide as a main component in an amount of 5 to 17 mol% (preferably 5.5 to 12 mol%) in terms of CuO, and iron oxide as an F component. e ₂ 0 ₃ translated at 57-61 mole% (preferably 59 to 61 mol%), a MO 0 to 1 5 mol%, preferably from 1 to 1 5 mol%, particularly preferably 5 to 1 5 mol% ( O is at least one of Ni0, ΖηΟ, and MgO, except for MO content of 0, and the remainder is AO (AO is at least one of 8 & 0 or 3rO).

 The form of MO is a single form of Ni0, ZnO, or MgO, or a mixed form of at least two kinds. When two or more kinds are used as a mixture, the total mol% of the mixture may be within the above range.

 The form of AO is a single form of BaO or SrO, or a mixed form of BaO and SrO.

Further, the magnetic oxide sintered body of the present invention, the bismuth oxide B 0 ₃ as subcomponent 0. 5-7 wt-% (preferably 0. 6~5wt%), contains.

Such bismuth oxide B i ₂ 0 ₃ is mixed in the form of additives during the oxide As can be seen from the examples described later, remains in the form of sintered also generally the oxide. When the content of the above main component is less than 5 mol%, the calcining temperature tends to be more than 1 000 ° C, and when the content of CuO exceeds 17 mol%, the magnetic permeability decreases. There is a tendency for the inconvenience to occur.

Further, when Fe ₂ 〇 ₃ is less than 57 mol% or when Fe _{2 3 3} is more than 6 mol%, there is a tendency that the magnetic permeability is disadvantageously reduced.

In content of the above-mentioned subcomponents, the content of the B i ₂ 0 ₃ is less than 0. 5 wt%, resulting inconvenience cormorants have the more than 90% is not obtained in the theoretical density 1 000 ° C following firing tend, the content of the B 0 ₃ 7 1:% of ultra Eru, tends to occur a disadvantage that the permeability is lowered. The addition of such B i ₂ 0 ₃ subcomponent, particularly, this to significantly realize low-temperature sintering What content coupled with the CuO amount of the Can be. There is also a synergistic effect of improving magnetic properties. When the firing temperature is lowered, co-firing is performed with a low-melting-point electrode material such as Ag, which is inexpensive and has low electric resistance, so that an element with an integrated electrode and a closed magnetic circuit configuration can be easily manufactured.

Instead of subcomponent B 0 ₃ of the borosilicate glass as a subcomponent, the borosilicate zinc glass or bismuth glass 0. 5~7 wt% (preferably 0. 6-5 wt%) so as to have free Is also good. These glasses can also Rukoto used as a mixture with the secondary component B i ₂ 0 _3.

The borosilicate glass generally indicates glass containing _{B 2 O 3, S i 0} 2, the borosilicate zinc glass generally B ₂ 0 _3, shows a glass containing _{S i 0 2, Z n O} , the bismuth glass generally indicates glass containing B i ₂ 0 _3. In the definition of each of these glasses, the above components need not be the main components.

As the content form of the glass of these auxiliary components, one of borosilicate glass, zinc borosilicate glass and bismuth glass may be used alone, or two or three of these may be used. It may be used in combination. When two or more kinds are mixed and used, the total weight% of the mixture may be within the above range. By adding such a glass, it is possible to obtain a high electrical resistivity (to increase the electrical resistivity) and a low dielectric constant (to decrease the dielectric constant). Thus, the addition of such a predetermined glass, for example, as a high frequency circuit ^{components, 1 X 1 0 5 Ω ·} m or more in electrical resistivity are obtained required laminate device material.

 Furthermore, the addition of the prescribed glass of the present application also exerts an effect of reducing the dielectric constant, and when the sintered body of the present invention is used as a high-frequency component, a high impedance is obtained at a high frequency and an effect of widening the impedance is obtained. There is. In addition, these glass additions require that the state at the time of addition be glass. After firing, the glass components used are present in the fired body, whether or not in a glassy state.

 Among these glasses, in particular, zinc borosilicate glass and borosilicate glass are preferable for more effectively realizing high resistivity and low dielectric constant. Further, when compared with the same glass addition amount, bismuth glass is particularly preferable from the viewpoint that the temperature at which the relative density of 90% or more can be obtained can be lowered.

Devices manufactured in this way are, for example, compact and have high Q-factor inductors. It is used as a high-frequency element (high-frequency circuit component) such as a noise filter or a small-sized noise filter with a high impedance in a high-frequency band, particularly at a specific frequency.

 When Zn 0 is used as the above MO, and when it is contained in an amount of 0 to 15 wt% (excluding the content of 0), the magnetic permeability can be further improved and the high-frequency circuit components It has a particularly favorable effect on increasing the impedance (obtaining a high impedance) when fabricating and widening the impedance. When MO is composed of NiO or MgO and is contained in an amount of 0 to 15 wt% (excluding the content of 0), it has the effect of increasing the resonance frequency as well as improving the magnetic permeability. Therefore, it has a particularly favorable effect as a high-frequency circuit component for controlling high impedance and a band of impedance.

 Further, in the magnetic oxide sintered body of the present invention, 80% or more, particularly preferably 90% or more, is formed of Y-type hexagonal ferrite. Here, “%” is calculated from the main peak ratio of the X-ray diffraction intensity.

 When the occupation ratio of the Y-type hexagonal ferrite is less than 80%, there is a disadvantage that a high magnetic permeability cannot be obtained at a high frequency. This makes it difficult to obtain a high-frequency circuit component having a high inductance impedance.

When co-firing with a low-melting-point electrode material such as silver (Ag), the main firing temperature is low. To achieve 80% or more of the Y-type hexagonal ferrite after sintering, it is necessary to use It is necessary to generate 80% or more of hexagonal ferrite. Ru depends composition but, 850 ° decomposition starts from the vicinity of C B a F e ₁₂ 0 ₁₉ and _{B a F e 2 O 4,} Y -type hexagonal ferrite Bok generation begins.

_{However, B a F e 12 0,} 9 and B a F e ₂ 0 ₄ of degradation unless Y-type hexagonal ferrite Bok production does not proceed sufficiently proceed. Therefore, it is necessary to set the calcination temperature to 850 ° C or more, especially 850 to 10000 ° C, in order to make the 丫 -type hexagonal ferrite 80% or more. Further, it is necessary to contain the CuO amount preferably in the range of 5.5 to 17 mol%. If the calcination temperature is lower than 850 ° C or the CuO content is out of the above range, it becomes difficult to generate a hexagonal ferrite of more than 80%. On the other hand, if the calcining temperature is too high, exceeding 1 000 ° C, it becomes impossible to obtain fine ground powder. The production of fine ground powder is a very important technology for low-temperature firing. From such a viewpoint, in order to increase the generation rate of 丫 -type hexagonal ferrite at a calcining temperature of 850 1 000 ° C as described above, the amount of the CuO as a main component is preferably set to 5%. It is necessary to contain 517 mol%.

 Such a magnetic oxide sintered body in the present invention is used as a high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, for example, as an impedance or an inductor.

 Hereinafter, the present invention will be described in more detail with reference to specific examples.

[Experimental example 1-1]

 (Production of Example Sample and Comparative Example Sample)

 Each raw material was weighed so that the composition after sintering had the composition shown in Table 1 below, and was wet-mixed in a steel ball mill for 15 hours. Next, this mixed powder was calcined in the air at the temperature shown in Table 1 for 2 hours. Then, as shown in Table 1, B

After adding a predetermined amount of ₁₂ O ₃ and a predetermined glass, the mixture is pulverized for 15 hours with a steel pole mill, and the thus obtained hexagonal ferrite powder is granulated, and a desired pressure is applied at a pressure of 1 O OMPa. It was molded into a shape.

 The compact was sintered in the atmosphere at the temperature shown in Table 1 for 2 hours. The composition of the hexagonal ferrite sintered body is as shown in Table 1 below.

The magnetic permeability at a frequency of 80 OMHz at 25 ° C was measured and is shown in Table 1. The permeability target is a value of 6.0 or more at a frequency of 80 OMHz.

The occupancy of the Y-type hexagonal ferrite was calculated from the intensity ratio of the X-ray diffraction peaks using the pulverized powder of the sintered body.

table 1

 Main component (mol%) Additive component (wt »

 Sample permeability

 L Λ 77Χ7Λ ¾tH¾ I t3 Occupancy

₂ ο. Fe ₂ 0 ₃ CuO ZnO NiO MgO BaO SrO Bi ₂ 0 ₃ 3ΐ oUUMH Force 'Las Force' Lath Lead Force 'Las (° c) (° c) (%)

 Example 1-1-1 60 5 15 1-1 20-5 1000 930 95 10.4 Example 1-1-2 60 10 10.5 19.5 5 1-1-1000 930 95 7.9 Example 1-1-3 60 15 5.5 1-1 19.5 1 5 '1 ― 1000 930 .95 7.8 Example Toto 4 60 17 5.5 1-17.5-5 _ 1 1000 930 95 7.3 Example 1-5 61 15 2 1 22 1 5 1-1 1000 930 95 6.2 Example 1 -G 6 60 10 ― 10 1 20 5 1 1 1 1 1 000 95 9.3 6.3 Example 1-1-7 60 10 ― _ 10 20 ― 5 ― ― ― 1000 930 95 6.8 Example 1-g 8 60 10 10 ― _ 10 10 5 ― ― 1000 930 95 8.0 Example 1 9 9 10 10 ― ― 20 1 0.6 ― 1 1000 975 95 7.2

O Example 1-10 10 10 10--20-7 1--1000 930 95 6.8 Example 1-10 11 60 10 10--20--0.6-1 1000 975 95 7.0 Example 1-12 60 10 10 1 ― 20 1 ― 3 ― ― 1000 930 95 7.4 Example 1-drop 13 60 10 10--20-1 7 ― 1 1000 930 95 6.8 Example 1-drop 14 60 10 10 20 0.6 1000 975 95 6.3 Example 1- Η5 60 10 10 20 3 1000 930 95 6.9 Example 1- 16 16 10 10 20 7 1000 930 95 6.1 Example 1-H7 60 10 10 20 0.6 1000 975 95 7.1 Example 1-1-18 60 10 10 20 3 1000 930 95 7.4 Example 1-19 60 10 10 20 7 1000 930 95 6.6 Example I-20 60 10 10 20 5 900 930 83 6.0

Table 1 (continued)

Main component (mol¾) Additional component (wtt) ¹ t

 Sample permeability

 L Mass Dish /: Occupancy

_{N o. Fe 2 0 3 CuO} ZnO NiO gO BaO SrO Bi 2 0 3 at oUUMHz

 Lath j Lath Lead Lath (° c) (.c) (%)

Comparative Example 1-1-1 62 10 10 18 5 1000 930 95 4.9 Comparative Example 1-1-2 56 11 11 22 5 1000 930 95 3.8 Comparative Example 1-1-3 60 3 15 22 5 "1000 930 95 4.8 Comparative Example 1-1-4 60 20 5 15 5 1000 930 95 4.3 Comparative Example 1-G 5 60 5 20 15 5 1000 930 95 4.7 Comparative Example 1-1-6 60 5 20 15 5 One 1000 930 95 4.2 Comparative Example 1 -1 -7 60 5 20 15 3 1000 930 95 4.7 Comparative example 1-g 8 60 10 10 20 0.3 3 1000 930 95 3.0 Comparative example 1-1-9 60 10 10 20 10 1000 930 95 4.6 Comparative example 1 -10 60 10 10 20 0.3 1000 930 95 3.2 Comparative example 1-1-11 60 10 10 20 10 1000 930 95 4.3 Comparative example 1-1-12 60 10 10 20 0.3 1000 930 95 3.4 Comparative example 1-1-13 60 10 10 20 5 1000 800 77 3.4

[Experiment 1-I I]

Next, an inductance element was manufactured using the magnetic material of the present invention. That is, each raw material was weighed such that the composition after sintering had a composition as shown in the Example 11-12 sample in Table 1 above, and was wet-mixed with a steel ball mill for 15 hours. Next, this mixed powder was calcined in the air at 950 ° C. for 2 hours. Then, after the B i ₂ 0 ₃ as a subcomponent added 5 wt%, was milled 1 5 hour steel ball mill.

 An organic binder was mixed with the calcined powder, and a uniform green sheet was formed by a doctor blade method.

 Next, a conductive paste prepared by mixing silver was prepared, and the coil was laminated on the above-mentioned green sheet so as to form a spiral reel. A pressure was applied in the thickness direction and pressure bonding was performed to produce a green sheet laminate in which electrodes were sandwiched between magnetic materials. This was fired at 930 ° C. for 2 hours. A silver paste is applied to the position of the inner conductor on the side surface of the obtained sintered body, and the external electrodes are baked, and the inductance element schematically shown in FIG.

(High-frequency circuit components). FIG. 1 is drawn as a model diagram to facilitate understanding of the internal structure of the device. In FIG. 1, reference numeral 1 denotes an inner conductor.

(Ag coil), reference numeral 10 denotes a terminal conductor, and reference numeral 20 denotes a ferrite.

 When the impedance and the magnetic permeability of the obtained inductance element were measured at 800 MHZ, in the case of the present invention, an extremely excellent characteristic having an impedance of 436 Ω (the magnetic permeability was 7.9) was obtained.

 [Experiment 1-I I I]

 Next, an inductance element was manufactured using the magnetic material of the present invention. That is, each raw material was weighed so that the composition after sintering had a composition as shown in Example 1-1-1-12 samples in Table 1 above, and was wet-mixed with a steel pole mill for 15 hours. Next, this mixed powder was calcined in the air at 950 ° C. for 2 hours. Next, 3 wt% of bismuth glass was added as an auxiliary component, and the mixture was ground for about 5 hours with a steel pole mill.

 An organic binder was mixed with the calcined powder, and a uniform green sheet was formed by a Doc Yuichi blade method.

Next, a conductive paste prepared by mixing silver is prepared, and is placed on the green sheet. The coils were stacked in a spiral shape. A pressure was applied in the thickness direction to perform compression bonding to produce a green sheet laminate in which electrodes were sandwiched between magnetic materials. This was fired at 930 ° C for 2 hours. A silver paste is applied to the position of the inner conductor on the side surface of the obtained sintered body, and the external electrodes are baked, and the inductance element schematically shown in FIG.

(High-frequency circuit components). FIG. 1 is drawn as a model diagram to facilitate understanding of the internal structure of the device. In FIG. 1, reference numeral 1 denotes an inner conductor.

(Ag coil), reference numeral 10 denotes a terminal conductor, and reference numeral 20 denotes a ferrite.

 When the impedance and the magnetic permeability of the obtained inductance element were measured at 80 OMHz, in the case of the present invention, an extremely excellent characteristic having an impedance of 408 Ω (magnetic permeability was 7.4) was obtained.

 From the above results, the effect of the first invention group of the present invention is clear. That is, the present invention has extremely good magnetic properties up to a high frequency band of several hundred MHz to GHz, and contains as little as possible a foreign phase other than the Y-type hexagonal ferrite at 1 000 ° C or less, particularly around 900 ° C. Can be fired (low-temperature firing is possible).

(2) Description of the second invention group

 Since the magnetic oxide sintered body in the second invention group of the present invention is a ceramic sintered body, it can be manufactured by an ordinary ceramic manufacturing process.

In the magnetic oxide sintered body of the second invention group of the present invention, cobalt oxide as a main component is 0 to 1.9 mol% in terms of CoO (except for the content 0, and the preferable range is 0.1 to 1 mol%). . 0 mol%), in 5 to 1 7 mol% (rather preferably is calculated as CuO of copper oxide, 5. 5-1 2 mol%), 57-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of ( Preferably, it is 59 to 61 mol%), MO is 0 to 15 mol%, preferably 1 to 15 mol%, particularly preferably 5 to 15 mol% (MO is Ni 0, ZnO, It is at least one kind of MgO, except for MO content of 0, and the remainder is AO (AO is at least one of 8 & 0 or 3r0).

The form of MO is a single form of N i 0, Οη M, or M g 、, or a mixed form of at least two kinds. When two or more types are used in combination, The total mol% should be within the above range t

 The form of AO is BaO or Sr0 alone, or a mixed form of BaO and SrO.

Further, the magnetic oxide sintered body of the present invention, the bismuth oxide B 0 ₃ as subcomponent 0. 5-7 wt-% (preferably 0. 6~5wt%), contains.

Such bismuth oxide B i ₂ 0 ₃ is mixed in the form of additives during the oxide As can be seen from the examples described later, remains in the form of sintered also generally the oxide. If the content of the main component is more than 1.9 mol%, there arises a problem that the desired magnetic permeability cannot be obtained. In the present invention, the lower limit of the content% of C0θ is a value that does not include zero, and it has been experimentally confirmed that the effect of addition of 0.01% by mole is confirmed.

 In addition, if CuO is less than 5 mol%, the calcination temperature tends to be inconvenience of exceeding 1 000 ° C, and if the sintering temperature exceeds 17 mol%, the magnetic permeability decreases. Inconvenience tends to occur.

Further, Fe ₂ 0 ₃ is or becomes less than 57 mol%, Fe ₂ 0 ₃ is the result permeability or exceed 61 mol% tends to not have coupling occurs decreases.

In content of the above-mentioned subcomponents, the content of the B i ₂ 0 ₃ is less than 0. 5 wt%, resulting inconvenience cormorants have the more than 90% is not obtained in the theoretical density 1 000 ° C following firing tends tends to content of the B 0 ₃ 7 \ ^ 1% and super Eru, disadvantageously permeability is lowered occurs. Such addition of the Bi ₂ O ₃ subcomponent, in particular, can significantly realize low-temperature sintering in combination with the above content of CuO. There is also a synergistic effect of improving magnetic properties. When the firing temperature is lowered, co-firing is performed with a low-melting-point electrode material such as Ag, which is inexpensive and has low electric resistance, so that an element with an integrated electrode and a closed magnetic circuit configuration can be easily manufactured.

Instead of subcomponent B i ₂ 0 ₃ of the borosilicate glass as a subcomponent, borosilicate zinc glass or bismuth glass 0. 5-7 wt-% (preferably 0. 6 ~ 5wt%) as a free Is also good. These glasses can also Rukoto used as a mixture with the secondary component B i ₂ 0 _3.

The borosilicate glass generally indicates glass containing _{B 2 0 3, S i 0} 2, zinc borosilicate glass Las and generally B ₂ 0 _3, shows a glass containing _{S i 0 2, Z n 0} , and the bismuth glass generally indicates glass containing B i ₂ 0 _3. In the definition of each of these glasses, the above components need not be the main components.

As the content form of the glass of these auxiliary components, one of borosilicate glass, zinc borosilicate glass and bismuth glass may be used alone, or two or three of these may be used. You may mix and use. When two or more kinds are mixed and used, the total weight% of the mixture may be within the above range. By adding such a glass, it is possible to obtain a high electrical resistivity (high electrical resistivity) and a low dielectric constant (low dielectric constant). Thus, the addition of such a predetermined glass, for example, as a high frequency circuit ^{components, 1 X 1 0 5 Ω ■} m or more electrical resistivity required laminate device material is obtained.

 Furthermore, the addition of the prescribed glass of the present application also exerts an effect of reducing the dielectric constant, and when the sintered body of the present invention is used as a high-frequency component, a high impedance is obtained at a high frequency and an effect of widening the impedance is obtained. There is. In addition, these glass additions require that the state at the time of addition be glass. After firing, the glass components used are present in the fired body, whether or not in a glassy state.

 Among these glasses, in particular, zinc borosilicate glass and borosilicate glass are preferable for more effectively realizing high resistivity and low dielectric constant. Further, when compared with the same glass addition amount, bismuth glass is particularly preferable from the viewpoint that the temperature at which the relative density of 90% or more can be obtained can be lowered.

 The element manufactured in this way is, for example, a small inductor having a high Q value, or a small high-frequency element (high-frequency circuit component) such as a noise filter having a large impedance in a high frequency band, particularly at a specific frequency. Used.

When Zn 0 is used as the above M 0 and the content is 0 to 15 wt% (excluding the content 0), the magnetic permeability can be improved in each step and the high frequency circuit Particularly advantageous effects are achieved in increasing the impedance (obtaining a high impedance) when the component is manufactured and broadening the impedance. When N 0 ゃ [^ 1 ^ 0 is used as M 0 and the content is 0 to 15 wt% (excluding content 0), not only the permeability is improved but also the resonance frequency is increased. Has the effect of increasing Subordinate As a high-frequency circuit component, it exerts a particularly favorable effect for controlling high impedance and a band of impedance.

 Further, in the magnetic oxide sintered body of the present invention, 80% or more, particularly preferably 90% or more, is formed of Y-type hexagonal ferrite. Here, “%” is calculated from the main peak ratio of the X-ray diffraction intensity.

 If the occupation ratio of the Y-type hexagonal ferrite is less than 80%, there is a disadvantage that a high magnetic permeability cannot be obtained at a high frequency. This makes it difficult to obtain a high-frequency circuit product having a high inductance impedance.

When co-firing with a low-melting-point electrode material such as silver (Ag), the main firing temperature is low, and in order to make the Y-type hexagonal ferrite after sintering 80% or more, Y It is necessary to generate 80% or more of hexagonal ferrite. Ru depends composition but, 850 ° B a F e, 2 0 I9 and B a F e ₂ 0 ₄ decomposition starts from the vicinity of C, Y-type hexagonal ferrite Bok generation begins.

However, B a F e _l2 0 _1s and B a F e ₂ 0 ₄ of decomposition product of if Y-type hexagonal ferrite Bok be sufficiently proceed does not proceed. Therefore, it is necessary to set the calcination temperature to 850 ° C or more, especially 850 to 10000 ° C, in order to make the 丫 -type hexagonal ferrite 80% or more. Further, it is necessary to contain the CuO amount preferably in the range of 5.5 to 17 mol%. If the calcination temperature is less than 850 ° C or the CuO content is out of the above range, it becomes difficult to produce Y-type hexagonal ferrite exceeding 80%. On the other hand, if the calcining temperature is too high, exceeding 1 000 ° C, it becomes impossible to obtain fine ground powder. The production of fine ground powder is a very important technology for low-temperature firing. From such a viewpoint, in order to increase the generation rate of Y-type hexagonal ferrite at a calcining temperature of 850 to 10000 ° C. as described above, the amount of Cu 0 as a main component is preferably 5. It is necessary to contain 5 to 17 mol%.

 Such a magnetic oxide sintered body in the present invention is used as a high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, for example, as an impedance or an inductor.

 Hereinafter, the present invention will be described in more detail with reference to specific examples.

[Experiment 2—I] (Production of Example Sample and Comparative Example Sample)

 Each raw material was weighed so that the composition after sintering had a composition as shown in Table 2 below, and was wet-mixed in a steel ball mill for 15 hours. Next, this mixed powder was calcined in the atmosphere at the temperature shown in Table 2 for 2 hours. Next, as shown in Table 2, B

1 ₂ 0 ₃ and after adding a predetermined amount of predetermined glass was 1 5 hour Kona碎the steel-made ball mill.

 The hexagonal ferrite powder thus obtained was granulated and formed into a desired shape at a pressure of 1 OOMPa.

 This compact was sintered in the air at the temperatures shown in Table 2 for 2 hours. The composition of the hexagonal ferrite sintered body is as shown in Table 2 below.

Table 2 shows the measured magnetic permeability at a frequency of 800 MHz at 25 ° C. The magnetic permeability aims at a value of 6.0 or more at a frequency of 80 MHz.

The occupancy of the Y-type hexagonal ferrite was calculated from the intensity ratio of the X-ray diffraction peaks using the pulverized powder of the sintered body.

Table 2

 Main component (tno) Additive component (wt%)

 Sample Permeability 0.t, 'マ λ Boron acid Borosilicate Occupancy at RnflMH7

Fe ₂ 0 ₃ CoO CuO ZnO MgO BaO SrO Bi ₂ 0 ₃

 Force Lath Lath Lead Lath CO (° c) (%)

Example 2-1-1 60 0.3 8 12.4--19.3 One 5 One--1000 930 95 10.5 Example 2-1-2 60 0.5 8 12--19.5 One 5-One 1000 930 95 9.8 Example 2- 1-3 60 1 8 11.5--19.5-5 1 ― 1000 930 95 7.0 Example 2-g 4 60 1.5 8 11--19.5-5-― ― 1000 930 95 6.2 Example 2-g 5 60 1.8 8 10.7 1 ― 19.5 1 5-― ― 1000 930 95 6.0 Example 2-6 60 0.01 8 12.49 1 19.5 5-― 1 1000 930 95 8.2 Example 2-1-7 61 0.5 8 11--19.5 1 5 1 ― -1000 930 95 10.2 Example 2-g 8 57 0.5 8 11--23.5-5 1-1 1000 930 95 6.8 Example 2-9 60 0.5 5 14-1 20.5-5-1-1000 930 95 12.0 οο Example 2-10 6 0.5 10 9 1-20.5-5 1-1 1000 930 95 10.0 Example 2-10 11 60 0.5 16 1-1 22.5-5 1-1 1 1000 930 95 6.0 Example 2-12 60 0.5 11 5-1 23.5-5 ― 1 ― 1000 930 95 6.1 Example 2-1-13 60 '0.5 7 15-'-17.5-5-1 ― 1000 930 95 9.0 Example 2 + 14 60 0.5 8 10 21.5 5 1000 930 95 7.0 Example 2-1 -15 60 0.5 8 10 11.5 10 5 1000 930 95 8.4 Example 2 16 60 0.5 8 11 20.5 0.6 1000 975 95 7.5 Example 2-1-17 60 0.5 8 11 20.5 7 1000 930 95 8.6 Example 2-Example 18 60 0.5 8 11 20.5 0.6 1000 975 95 7.8 Example 2-Example 19 60 0.5 8 11 20.5 5 1000 930 95 9.5 Example 2-1-20 60 0.5 8 11 20.5 7 1000 930 95 8.8

Table 2 (continued)

 4 Main component (mol¾) Added component (wt%)

 "* 4- ^ ノ, — ノ f ル 磁 磁 丰

 Bismuth Borosilicate Borosilicate J Occupancy

_{Ν ο. Fe 2 0 3 CoO} CuO ZnO NiO MgO BaO SrO Βί 2 0 3 at 800MHz

 Lath force, Lath Lead Lath (° c) (° c) (%)

Example 2-Part 21 60 0.5 8 11 ― 20.5 ―-One 0.6 'One 1000 975 95 7.0 Example Two-Part 22 60 0.5 8 11-― 20.5 ― One ― Three One 1000 930 95 7.3 Example Two-Part 23 60 0.5 8 "--20.5-1 1 7 1 1000 930 95 6.8 Example 2-24 24 0.5 0.5-1 20.5 1---0.6 1000 975 95 7.7 Example 2-25 60 0.5 8-1 20.5- ― ―-3 1000 930 95 9.0 Example 2-1-26 60 0.5 8-1 20.5-― 1 7 1000 930 95 8.2 Example 2-1-27 60 0.5 8 ― 1 20.5-5--― 900 930 85 6.2 Comparative Example 2-Table 1 60 2.5 8 ― ― 18.5 ― 5 1 ― 1 1000 930 95 4.8 Comparative Example 2-1 -2 62 0.5 6 11 ― 1 20.5 1 5 ― ―-1000 930 95 5.5O Comparative Example 2+ 3 56 0.5 12 ― 1 20.5 5 1 1 ― 1000 930 95 5.3 Comparative example 2-4 61 0.5 3 "-24.5 ― 5 1--1000 930 95 4.0 Comparative example 2-1-5 60 0.5 20 1-1 18.5 One 5 one--1000 930 95 3.5 Comparative example 2-1-6 60 0.5 5 20 ―-14.5-5 One thousand one 1000 930 95 5.4 Comparative example 2-1-7 60 0.5 5 20 14.5 3 1000 930 95 4.5 Compare Example 2-1-8 60 0. 5 5 20 14.5 3 1000 930 95 4.9 Comparative example 2-g 9 60 0.5 8 20.5 0.3 1000 930 95 3.2 Comparative example 2-g 10 60 0.5 8 20.5 10 1000 930 95 5.2 Comparative example 2-H1 60 0.5 8 20.5 0.3 1000 930 95 3.6 Comparative Example 2-Table 12 60 0.5 8 20.5 10 1000 930 95 4.8 Comparative Example 2-1-13 60 0.5 8 20.5 5 850 930 77 3.8

[Experimental example 2-1 1]

Next, an inductance element was manufactured using the magnetic material of the present invention. That is, each raw material was weighed such that the composition after sintering had a composition as shown in Example 2-I-10 sample in Table 2 above, and was wet-mixed for 15 hours with a steel ball mill. Next, this mixed powder was calcined in the air at 950 ° C. for 2 hours. Then, after the B i ₂ 0 ₃ as a subcomponent added 5 wt%, and 1 5 hour Kona碎the steel-made ball mill.

 An organic binder was mixed with the calcined powder, and a uniform green sheet was formed by a doctor blade method.

 Next, a conductive paste prepared by mixing silver was prepared, and a coil was laminated on the green sheet in a spiral shape. A pressure was applied in the thickness direction to perform compression bonding to produce a green sheet laminate in which electrodes were sandwiched between magnetic materials. This was fired at 930 ° C. for 2 hours. Silver paste was applied to the position of the internal conductor on the side surface of the obtained sintered body, and the external electrode was baked to obtain an inductance element (high-frequency circuit component) schematically shown in FIG. FIG. 1 is drawn as a model diagram to facilitate understanding of the internal structure of the device. In FIG. 1, reference numeral 11 denotes an inner conductor (Ag coil), reference numeral 10 denotes a terminal conductor, and reference numeral 20 denotes a ferrite.

 When the impedance and the magnetic permeability of the obtained inductance element were measured at 800 MHZ, extremely excellent characteristics having an impedance of 552 Ω (the magnetic permeability was 10.0) were obtained in the case of the present invention.

[Experiment 2—I I I]

 Next, an inductance element was manufactured using the magnetic material of the present invention. That is, each raw material was weighed such that the composition after sintering had a composition as shown in Example 2-I-19 sample in Table 2 above, and was wet-mixed with a steel ball mill for 15 hours. Next, this mixed powder was calcined in the air at 950 ° C. for 2 hours. Next, 5 wt% of bismuth glass was added as an auxiliary component, and the mixture was ground with a steel ball mill for 15 hours.

 An organic binder was mixed with the calcined powder, and a uniform green sheet was formed by a doctor blade method.

Next, a conductive paste prepared by mixing silver is prepared and placed on the green sheet. The coils were stacked in a spiral ^^. A pressure was applied in the thickness direction to perform compression bonding to produce a green sheet laminate in which electrodes were sandwiched between magnetic materials. This was fired at 930 ° C. for 2 hours. A silver paste is applied to the position of the inner conductor on the side surface of the obtained sintered body, and an external sound electrode is baked, and the inductance element shown schematically in FIG.

(High-frequency circuit components). FIG. 1 is drawn as a model diagram to facilitate understanding of the internal structure of the device. In FIG. 1, reference numeral 1 denotes an inner conductor.

(Ag coil), reference numeral 10 denotes a terminal conductor, and reference numeral 20 denotes a ferrite.

 When the impedance and the magnetic permeability of the obtained inductance element were measured at 800 MHZ, in the case of the present invention, an extremely excellent characteristic having an impedance of 524 Ω (the magnetic permeability was 9.5) was obtained.

 From the above results, the effect of the second invention group of the present invention is clear. That is, the present invention has extremely good magnetic properties up to a high frequency band of several hundred MHz to GHz, and contains as little as possible a foreign phase other than the Y-type hexagonal ferrite at a temperature of 100 ° C. or less. Can be fired at around 0 ° C (low-temperature firing is possible). Industrial applicability

 The magnetic oxide sintered body of the present invention is used as a high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, for example, as an impedance or an inductor.

Claims

The scope of the claims 1. A magnetic oxide sintered body occupied by 80% or more of Y-type hexagonal ferrite, Magnetic sintered oxide, 5 to 7 mol% of copper oxide in terms of CuO as a main component, 57-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of the MO 0 to 1 5 mol% ( MO is at least one of N! O, Zn0, and MgO, except for MO content 0, and the remainder is AO (AO is at least one of BaO or Sr0); Magnetic oxide sintered body, characterized that you were made to contain 0. 5-7 wt-% of bismuth oxide (B i ₂ 0 ₃₎ as a sub-component. 2. A magnetic oxide sintered body occupied by 80% or more of Y-type hexagonal ferrite, Magnetic sintered oxide, 5-1 7 mol% of copper oxide in C u 0 calculated as a main component, 57-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of, 1 ^ 10 0-1 5 mol% (MO is at least one of Ni0, ZnO, and MgO, excluding MO content 0), and the remainder is AO (AO is at least one of BaO or Sr0) ,  A magnetic oxide sintered body containing 0.5 to 7 wt% of borosilicate glass, zinc borosilicate glass, or bismuth glass as an auxiliary component. 3. The magnetic oxide sintered body according to claim 1, wherein a calcination temperature in the production of the magnetic oxide sintered body is 850 ° C to 1000 ° C. 4. The magnetic oxide sintered body according to claim 2, wherein a calcination temperature in the production of the magnetic oxide sintered body is 850 ° C to 1000 ° C. 5. A high-frequency circuit portion α having a structure in which a conductor is embedded in a magnetic oxide sintered body, The magnetic oxide sintered body is occupied by 80% or more of the Υ-type hexagonal ferrite, and Magnetic sintered oxide, as a main component, 5-1 7 mol% of copper oxide in C u O conversion, 57-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of, 0-1 the MO 5 Mol% (MO is at least one of Ni0, ZnO, MgO, excluding MO content 0), and the balance is AO (AO is at least one of BaO or SrO), High frequency circuit components, characterized that you the Sani匕bismuth as an accessory component (B i ₂ 0 ₃₎ comprising a 0. 5-7 wt-%. 6. A high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, The magnetic oxide sintered body is occupied by 80% or more of the Y-type hexagonal ferrite, and the magnetic oxide sintered body has copper oxide as a main component of 5 to 17 mol% in terms of Cu0. , 57-61 mol% of iron oxide in F e ₂ 0 ₃ in terms of, 0-1 5 mol% of MO (MO is an N i 0, ZnO, at least Ί species MgO, content 0 ΜΟ except ), The rest AO (AO is at least one of BaO or SrO)  Borosilicate glass, zinc borosilicate glass or bismuth glass A high frequency circuit component characterized by containing up to 7 wt%. 7. The high-frequency circuit component according to claim 5, wherein a calcination temperature in the production of the magnetic oxide sintered body is 850 ° C to 1000 ° C. 8. The high-frequency circuit component according to claim 6, wherein a calcination temperature in the production of the magnetic oxide sintered body is 850 ° C. to 100 ° C. 9. The high-frequency circuit component according to claim 5, wherein the conductor has silver (Ag) as a main component. 10. The high-frequency circuit component according to claim 6, wherein the conductor is mainly composed of silver (Ag). 1 Ί. A magnetic oxide sintered body occupied by 80% or more of Y-type hexagonal ferrite, In the magnetic oxide sintered body, cobalt oxide as a main component is 0 to 1.9 mol% in terms of C00 (excluding 0 content), and copper oxide is 5 to 17 mol% in terms of CuO. 57-61 mol% of iron Fe ₂ 0 ₃ in terms of [^ 10 0-1 5 mol% (MO is, N i 0, Z nO, at least one MgO, content 0 of MO except ) And the remainder as AO (AO is at least one of BaO or SrO) Magnetic oxide sintered body, characterized that you were made to contain 0. 5-7 wt-% of bismuth oxide (B i ₂ 0 ₃₎ as a sub-component. 1 2. A magnetic oxide sintered body occupied by 80% or more of Y-type hexagonal ferrite, The magnetic oxide sintered body contains, as main components, Odani cobalt (0 to 1.9 mol% in terms of C00 (excluding content 0)), copper oxide (5 to 17 mol% in terms of CuO), 57-61 mol% of iron oxide Fe ₂ 0 ₃ in terms of, 0-1 5 mol% of MO (MO is at least one n i 0, Z n 0, MgO, content 0 of MO except ), The remainder as AO (AO is at least one of BaO or Sr0).  A magnetic oxide sintered body containing 0.5 to 7 wt as borosilicate glass, zinc borosilicate glass, or bismuth glass as an auxiliary component. 13. The magnetic oxide sintered body according to claim 11, wherein a calcination temperature in the production of the magnetic oxide sintered body is 850 ° C. to 100 ° C. 14. The magnetic oxide sintered body according to claim 2, wherein a calcination temperature in the production of the magnetic oxide sintered body is 850 ° C to 100 ° C. 15 A high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, The magnetic oxide sintered body is occupied by 80% or more of the Y-type hexagonal ferrite, and In the magnetic oxide sintered body, as main components, cobalt oxide is 0 to 1.9 mol% in terms of CoO (excluding content 0), copper oxide is 5 to 17 mol% in terms of CuO, and iron oxide is F e ₂ 0 ₃ translated at 57-61 mole%, 0-1 5 mol% of MO (MO is, n i 0, Z n O , at least one MgO, the content of MO 0 is excluded), the remainder As AO (AO is at least one of Ba0 or SrO), High frequency circuit components, characterized that you comprising the 0. 5 to 7 wt% of bismuth oxide (B i ₂ 0 ₃₎ as a sub-component. 1 6. A high-frequency circuit component having a structure in which a conductor is embedded in a magnetic oxide sintered body, The magnetic oxide sintered body is occupied by 80% or more of the Y-type hexagonal ferrite, and the magnetic oxide sintered body contains cobalt oxide as a main component in an amount of 0 to 1.9 mol in terms of C00. % (content 0 is excluded), 5 to 7 mol% of copper oxide in terms of CuO, 57 to 61 mol% of iron oxide in Fe ₂ 0 ₃ in terms of the MO 0 to 1 5 mol% (MO is, N i0, Zn0, at least one of MgO, except for MO content of 0), and the remainder as AO (AO is at least one of BaO or Sr0),  A high-frequency circuit component comprising 0.5 to 7 wt% of borosilicate glass, zinc borosilicate glass or bismuth glass as an auxiliary component. 17. The high-frequency circuit component according to claim 5, wherein a calcination temperature in the production of the magnetic oxide sintered body is 850 ° C. to 100 ° C. 18. The high-frequency circuit component according to claim 16, wherein a calcination temperature in the production of the magnetic oxide sintered body is 850 ° C to Ί0000 ° C. 16. The high-frequency circuit component according to claim 15, wherein the conductor is mainly composed of silver (Ag). 20. The high-frequency wave according to claim 16, wherein the conductor is mainly composed of silver (Ag). Circuit components.