CN121085624A - A high-performance permanent magnet ferrite tile and its preparation method - Google Patents
A high-performance permanent magnet ferrite tile and its preparation methodInfo
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- CN121085624A CN121085624A CN202511268372.7A CN202511268372A CN121085624A CN 121085624 A CN121085624 A CN 121085624A CN 202511268372 A CN202511268372 A CN 202511268372A CN 121085624 A CN121085624 A CN 121085624A
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Abstract
The invention belongs to the technical field of ferrite materials, and provides a high-performance permanent magnetic ferrite tile and a preparation method thereof, wherein the high-performance permanent magnetic ferrite tile comprises, by weight, 55-60 parts of ferric oxide, 15-25 parts of strontium carbonate, 1-2 parts of calcium carbonate, 0.5-0.8 part of silicon dioxide, 0.5-2 parts of aluminum oxide, 0.1-0.3 part of boric acid, 0.1-0.2 part of a cosolvent, 0.3-0.6 part of a dispersing agent and 0.5-1.2 parts of a forming agent. The high-performance permanent magnetic ferrite tile provided by the invention has higher remanence, coercivity, intrinsic coercivity and maximum magnetic energy product, and meanwhile, the preparation method is simple, convenient to operate and low in cost, and is suitable for industrial production.
Description
Technical Field
The invention belongs to the technical field of ferrite materials, and particularly relates to a high-performance permanent magnetic ferrite tile and a preparation method thereof.
Background
The permanent magnetic ferrite material has the characteristics of wide raw material sources, low price, excellent magnetic performance, high remanence, high coercivity, high magnetic energy product and high stability, and plays an important role in research and development of magnetic materials, and the permanent magnetic material can keep stable magnetism for a long time after an external magnetic field is applied. Permanent magnet materials are widely applied to the fields of automobiles, computers, information communication, aerospace, electrical appliance manufacturing and the like, penetrate into various aspects of life and become a material foundation in various fields.
The magnetic shoe is made of permanent magnetic ferrite material, is a tile-shaped magnet and is mainly used in motors of the industries of automobiles, motorcycles, electric bicycles, household appliances, fitness equipment and the like. On the one hand, the magnetic shoe is required to meet the requirement of a motor on permanent magnets on the magnetic performance, and on the other hand, the magnetic shoe is required to have corresponding intrinsic coercive force so as to ensure that the magnet does not generate irreversible demagnetization under the action of a strong demagnetizing field. Therefore, the magnetic shoe is required to have a high residual magnetic flux density and a high intrinsic coercive force.
However, the component of the existing permanent magnetic ferrite magnetic shoe raw material is Fe 2O3、SrCO3、CaCO3、SiO2、Al2O3, and the magnetic property of the raw material is poor after the raw material is mixed and sintered, so that the requirements cannot be well met. Therefore, how to make the permanent magnetic ferrite tile have higher residual magnetic induction intensity and higher intrinsic coercivity, and good high-low temperature demagnetization resistance is a technical problem to be solved at present.
Disclosure of Invention
The invention aims to provide a high-performance permanent magnetic ferrite magnetic shoe and a preparation method thereof, which are used for solving the technical problem that the magnetic performance of the permanent magnetic ferrite magnetic shoe in the prior art is poor.
The aim of the invention can be achieved by the following technical scheme:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
55-60 parts of ferric oxide, 15-25 parts of strontium carbonate, 1-2 parts of calcium carbonate, 0.5-0.8 part of silicon dioxide, 0.5-2 parts of aluminum oxide, 0.1-0.3 part of boric acid, 0.1-0.2 part of cosolvent, 0.3-0.6 part of dispersing agent and 0.5-1.2 part of forming agent.
Preferably, the cosolvent is one of copper oxide, lead oxide and bismuth trioxide. At high temperature, the cosolvent is in a viscosity liquid phase, which is favorable for increasing the contact area of solid phase reaction, greatly accelerating the reaction speed and reducing the sintering temperature.
Preferably, the dispersing agent is sodium polyacrylate. The addition of the dispersing agent can improve the dispersibility of the powder and reduce the agglomeration phenomenon, thereby optimizing the performance of the material.
Preferably, the forming agent is at least one of ammonium bicarbonate and calcium bicarbonate. The ammonium bicarbonate and the calcium bicarbonate can perform neutralization reaction with acidic components in the formula, so that the viscosity of the permanent magnetic ferrite slurry is reduced, the fluidity of the slurry is increased, the permanent magnetic ferrite magnetic tile with a compact structure is conveniently manufactured, and the finished product qualification rate of the permanent magnetic ferrite magnetic tile is improved.
The invention also provides a preparation method of the high-performance permanent magnetic ferrite magnetic shoe, which comprises the following steps:
S1, weighing raw materials according to parts by weight, mixing ferric oxide and strontium carbonate, adding the mixture into a ball mill, performing primary ball milling to obtain slurry I, drying, performing presintering, and naturally cooling to room temperature to obtain a presintered material;
s2, mixing the presintered material with calcium carbonate, silicon dioxide, aluminum oxide, boric acid, cosolvent, dispersing agent and forming agent, and adding the mixture into a ball mill for secondary ball milling to obtain slurry II;
S3, dehydrating the slurry II, pressing the slurry II into a green body in a longitudinal magnetic field, sintering the green body, naturally cooling the green body to room temperature, and grinding and magnetizing the green body to obtain the permanent magnetic ferrite tile.
Preferably, the mass ratio of the primary ball milling medium material to the ball to the water in the step S1 is 1:6-6.5:1.5.
Preferably, the particle size of the ball milling medium in the primary ball milling in the step S1 is 5-6 mm. The impact force of the larger ball milling medium is strong, coarse particles can be effectively crushed, and the crushing efficiency is improved.
Preferably, the rotating speed in the primary ball milling in the step S1 is 200-300 r/min, and the time is 20-24 h.
Preferably, the temperature in the presintering process in the step S1 is 1100-1150 ℃, and the temperature is kept for 1.5-2 hours. When the pre-sintering temperature is too high, crystal grains are easy to grow excessively, so that the magnetic performance is reduced, and when the pre-sintering temperature is too low, chemical reaction between raw materials cannot be fully performed, so that the magnetic performance of a final product is influenced.
Preferably, the mass ratio of the secondary ball milling medium material to the ball to the water in the step S2 is 1:11-12:2.
Preferably, the particle size of the ball milling medium in the secondary ball milling in the step S2 is 0.5-2 mm. The smaller ball milling medium particle size can increase the contact frequency and the collision strength between the grinding medium and the material, so that powder particles are more effectively thinned, more uniform particle size distribution is facilitated, the deformation of crystal grains is reduced, and the density and the magnetic property stability of the permanent magnetic ferrite material are improved.
Preferably, the rotating speed in the secondary ball milling in the step S2 is 200-250 r/min, and the time is 18-20 h.
Preferably, the water content is controlled to be 32% -36% in the dehydration process in the step S3.
Preferably, the temperature in the sintering process in the step S3 is 1180-1250 ℃, and the temperature is kept for 1.5-2 hours. Excessive sintering temperature can cause abnormal growth of crystal grains, so that the magnetization intensity is reduced, and defects such as cracks and the like even occur.
According to the technical scheme, the addition of the silicon dioxide greatly reduces the sintering temperature, the purpose of reducing the solid phase reaction temperature is achieved, the density of the magnet is improved, the growth of crystal grains is restrained by ferric silicate generated by the reaction of the silicon dioxide and ferric oxide, the higher coercive force is achieved, the calcium carbonate is in a molten state at a lower temperature, the liquid phase reaction for promoting the reaction rate can be achieved, and in addition, the sintering temperature is reduced, and meanwhile the density of the magnet is promoted. In addition, calcium carbonate can undergo decomposition reaction at 900 ℃ to generate calcium oxide, calcium oxide and silicon dioxide are easy to generate calcium silicate on a crystal boundary, and the calcium silicate is combined with low-melting-point ferric silicate (the melting point is 1150 ℃), so that a liquid composite glass phase is formed on the crystal boundary together, the liquid composite glass phase is melted at a lower temperature, the sintering temperature is reduced, and the solid phase reaction is promoted.
According to the technical scheme, the coercivity can be improved under the condition that residual magnetism is hardly reduced by adding a proper amount of boric acid, a glass phase for promoting solid phase reaction is formed by anhydride generated by boric acid at 300 ℃ during sintering, and the boric acid is uniformly distributed at the grain boundary, so that the grain boundary movement is blocked, and overgrowth of grains is prevented.
The invention has the beneficial effects that:
The high-performance permanent magnetic ferrite tile provided by the invention is prepared from the raw materials of ferric oxide, strontium carbonate, calcium carbonate, silicon dioxide, aluminum oxide, boric acid, cosolvent, dispersing agent and forming agent, wherein the grain size is regulated and controlled by doping auxiliary agents such as cosolvent, dispersing agent and forming agent in the process and the like through optimizing the formula of the raw materials and improving the preparation process of the permanent magnetic ferrite tile, and the grain size distribution is further optimized by combining a grading ball milling process, so that the magnetic property of the permanent magnetic ferrite tile is effectively improved, and the qualification rate of finished products of the permanent magnetic ferrite tile is improved.
In the invention, a grading ball milling process is also adopted, the larger ball milling medium breaks coarse particles mainly through impact action in the initial stage, and the smaller ball milling medium further refines powder through grinding action in the subsequent stage, so that the final particle size distribution is more uniform, the uniform distribution of the particles is beneficial to obtaining higher coercive force, and the magnetic property of the material is improved. Meanwhile, the adoption of the graded ball milling process can reduce unnecessary ball milling time, thereby reducing energy consumption and economic cost.
The high-performance permanent magnetic ferrite tile provided by the invention has higher remanence, coercivity, intrinsic coercivity and maximum magnetic energy product, and meanwhile, the preparation method is simple, convenient to operate and low in cost, and is suitable for industrial production.
Detailed Description
The technical scheme of the present invention will be clearly and completely described in the following examples. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides a high-performance permanent magnetic ferrite magnetic shoe, which comprises the following raw material components in parts by weight:
55 parts of ferric oxide, 15 parts of strontium carbonate, 1 part of calcium carbonate, 0.5 part of silicon dioxide, 0.5 part of aluminum oxide, 0.1 part of boric acid, 0.1 part of copper oxide, 0.3 part of sodium polyacrylate and 0.5 part of ammonium bicarbonate.
The preparation method of the high-performance permanent magnetic ferrite magnetic shoe comprises the following steps:
S1, weighing raw materials according to parts by weight, mixing ferric oxide and strontium carbonate, adding the mixture into a ball mill, performing primary ball milling, wherein the mass ratio of the raw materials to the balls to water is 1:6:1.5, the particle size of a ball milling medium is 5mm, the rotating speed is 200r/min, the time is 24 hours, obtaining slurry I, after drying, pre-sintering at 1100 ℃, preserving heat for 2 hours, and naturally cooling to room temperature to obtain a presintered material;
S2, mixing the presintered material with calcium carbonate, silicon dioxide, aluminum oxide, boric acid, cosolvent, dispersing agent and forming agent, adding into a ball mill, and performing secondary ball milling, wherein the mass ratio of the material to the ball to water is 1:11:2, the particle size of a ball milling medium is 0.5mm, the rotating speed is 200r/min, and the time is 20h, so as to obtain slurry II;
S3, dehydrating the slurry II, controlling the water content to be 32%, pressing the slurry II into a green body in a longitudinal magnetic field, sintering the green body at 1180 ℃, preserving heat for 2 hours, naturally cooling to room temperature, and grinding and magnetizing to obtain the permanent magnetic ferrite tile.
Example 2
The only difference from example 1 is that:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
58 parts of ferric oxide, 19 parts of strontium carbonate, 1.5 parts of calcium carbonate, 0.6 part of silicon dioxide, 1.0 part of aluminum oxide, 0.2 part of boric acid, 0.15 part of copper oxide, 0.4 part of sodium polyacrylate and 0.9 part of ammonium bicarbonate.
Example 3
The only difference from example 1 is that:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
60 parts of ferric oxide, 25 parts of strontium carbonate, 2 parts of calcium carbonate, 0.8 part of silicon dioxide, 2 parts of aluminum oxide, 0.3 part of boric acid, 0.2 part of copper oxide, 0.6 part of sodium polyacrylate and 1.2 parts of ammonium bicarbonate.
Example 4
The only difference from example 1 is that:
The mass ratio of the material, the ball and the water in the S1 is 1:6:1.5, and the mass ratio of the material, the ball and the water is 1:6.5:1.5.
Example 5
The only difference from example 1 is that:
The "particle diameter of the ball milling medium is 5mm" in S1 was replaced with "particle diameter of the ball milling medium is 6mm".
Example 6
The only difference from example 1 is that:
And replacing the rotating speed of 200r/min and the time of 24h in the step S1 with the rotating speed of 300r/min and the time of 20 h.
Example 7
The only difference from example 1 is that:
the mass ratio of the material, the ball and the water in the S2 is 1:11:2, and the mass ratio of the material, the ball and the water is 1:12:2.
Example 8
The only difference from example 1 is that:
The "particle diameter of the ball milling medium was 0.5mm" in S2 was replaced with "particle diameter of the ball milling medium was 1.5mm".
Example 9
The only difference from example 1 is that:
the "particle diameter of the ball milling medium was 0.5mm" in S2 was replaced with "particle diameter of the ball milling medium was 2mm".
Example 10
The only difference from example 1 is that:
And replacing the rotating speed of 200r/min and the time of 20h in the step S2 with the rotating speed of 250r/min and the time of 18 h.
Example 11
The only difference from example 1 is that:
the "control water content is 32%" in S3 is replaced with "control water content is 34%".
Example 12
The only difference from example 1 is that:
The "control water content is 32%" in S3 is replaced with "control water content is 36%".
Example 13
The only difference from example 1 is that:
The green body in S3 was sintered at 1180℃and held for 2h "instead of the green body at 1250℃and held for 1.5h".
Comparative example 1
The only difference from example 1 is that:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
55 parts of ferric oxide, 15 parts of strontium carbonate, 1 part of calcium carbonate, 0.5 part of silicon dioxide, 0.5 part of aluminum oxide and 0.1 part of boric acid.
Comparative example 2
The only difference from example 1 is that:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
55 parts of ferric oxide, 15 parts of strontium carbonate, 1 part of calcium carbonate, 0.5 part of silicon dioxide, 0.5 part of aluminum oxide, 0.1 part of boric acid, 0.3 part of sodium polyacrylate and 0.5 part of ammonium bicarbonate.
Comparative example 3
The only difference from example 1 is that:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
55 parts of ferric oxide, 15 parts of strontium carbonate, 1 part of calcium carbonate, 0.5 part of silicon dioxide, 0.5 part of aluminum oxide, 0.1 part of boric acid, 0.1 part of copper oxide and 0.5 part of ammonium bicarbonate.
Comparative example 4
The only difference from example 1 is that:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
55 parts of ferric oxide, 15 parts of strontium carbonate, 1 part of calcium carbonate, 0.5 part of silicon dioxide, 0.5 part of aluminum oxide, 0.1 part of boric acid, 0.1 part of copper oxide and 0.3 part of sodium polyacrylate.
Comparative example 5
The only difference from example 1 is that:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
50 parts of ferric oxide, 10 parts of strontium carbonate, 1 part of calcium carbonate, 0.5 part of silicon dioxide, 0.5 part of aluminum oxide, 0.1 part of boric acid, 0.1 part of copper oxide, 0.3 part of sodium polyacrylate and 0.5 part of ammonium bicarbonate.
Comparative example 6
The only difference from example 1 is that:
the high-performance permanent magnetic ferrite magnetic shoe comprises the following raw material components in parts by weight:
50 parts of ferric oxide, 10 parts of strontium carbonate, 0.8 part of calcium carbonate, 0.5 part of silicon dioxide, 0.5 part of aluminum oxide, 0.08 part of boric acid, 0.1 part of copper oxide, 0.3 part of sodium polyacrylate and 0.5 part of ammonium bicarbonate.
Comparative example 7
The only difference from example 1 is that:
The mass ratio of the material, the ball and the water in the S1 is 1:6:1.5, and the mass ratio of the material, the ball and the water is 1:5.5:1.5.
Comparative example 8
The only difference from example 1 is that:
The mass ratio of the material, the ball and the water in the S1 is 1:6:1.5, and the mass ratio of the material, the ball and the water is 1:7:1.5.
Comparative example 9
The only difference from example 1 is that:
the "particle diameter of the ball milling medium was 5mm" in S1 was replaced with "particle diameter of the ball milling medium was 4mm".
Comparative example 10
The only difference from example 1 is that:
the "particle diameter of the ball milling medium was 5mm" in S1 was replaced with "particle diameter of the ball milling medium was 7mm".
Comparative example 11
The only difference from example 1 is that:
And replacing the rotating speed of 200r/min and the time of 24h in the step S1 with the rotating speed of 150r/min and the time of 24 h.
Comparative example 12
The only difference from example 1 is that:
And replacing the rotating speed of 200r/min and the time of 24h in the step S1 with the rotating speed of 350r/min and the time of 24 h.
Comparative example 13
The only difference from example 1 is that:
the presintering is carried out at 1100 ℃ in the step S1, and the heat preservation is carried out for 2h, and the presintering is carried out at 1050 ℃ instead of the heat preservation for 2 h.
Comparative example 14
The only difference from example 1 is that:
The mass ratio of the material, the ball and the water in the S2 is 1:11:2, and the mass ratio of the material, the ball and the water is 1:10:2.
Comparative example 15
The only difference from example 1 is that:
the mass ratio of the material, the ball and the water in the S2 is 1:11:2, and the mass ratio of the material, the ball and the water is 1:13:2.
Comparative example 16
The only difference from example 1 is that:
the "particle size of the ball milling medium was 0.5mm" in S2 was replaced with "particle size of the ball milling medium was 0.35mm".
Comparative example 17
The only difference from example 1 is that:
the "particle size of the ball milling medium was 0.5mm" in S2 was replaced with "particle size of the ball milling medium was 2.2mm".
Comparative example 18
The only difference from example 1 is that:
and replacing the rotating speed of 200r/min and the time of 20h in the step S2 with the rotating speed of 150r/min and the time of 20 h.
Comparative example 19
The only difference from example 1 is that:
And replacing the rotating speed of 200r/min and the time of 20h in the step S2 with the rotating speed of 300r/min and the time of 20 h.
Comparative example 20
The only difference from example 1 is that:
The "control water content is 32%" in S3 is replaced with "control water content is 30%".
Comparative example 21
The only difference from example 1 is that:
The "control water content is 32%" in S3 is replaced with "control water content is 40%".
Comparative example 22
The only difference from example 1 is that:
And (3) sintering the green body at 1180 ℃ in the step S3, and insulating for 2h, wherein the green body is replaced by sintering the green body at 1100 ℃ and insulating for 2 h.
The permanent ferrite tiles obtained in example 1-example 13 and comparative example 1-comparative example 22 were subjected to the following performance tests:
1) Br, H cb、Hcj and (BH) max of the permanent magnetic ferrite magnetic shoe are detected according to GB/T3217-2013 magnetic test method of permanent magnetic (hard magnetic) material;
2) The tensile strength of the magnetic shoe is detected according to GB/T6983-2008, and the average value is obtained.
The test results are shown in Table 1:
TABLE 1
As can be seen from Table 1, the permanent magnetic ferrite tiles prepared in examples 1 to 13 have excellent remanence, coercivity, intrinsic coercivity and maximum magnetic energy product, wherein the remanence is greater than 417mT, the coercivity is greater than 296kA/m, the intrinsic coercivity is greater than 331kA/m, the maximum magnetic energy product is greater than 32.1kJ/m 3, and meanwhile, the compressive strength is 29.5MPa, so that the permanent magnetic ferrite tile obtained in the invention has excellent magnetic property and mechanical property.
As can be seen from comparison of comparative examples 1 to 6 with example 1, the types and amounts of the raw materials of one of the high-performance permanent magnetic ferrite tiles provided in comparative examples 1 to 6 are different from those of example 1, and the residual magnetism (Br), the magnetic coercive force (H cb), the intrinsic coercive force (H cj) and the maximum magnetic energy product (BH) max of the permanent magnetic ferrite tile obtained in comparative examples 1 to 6 are lower than those of the permanent magnetic ferrite tile obtained in example 1, so that the magnetic properties of the permanent magnetic ferrite tile are affected by both the selection of the raw materials for preparing the permanent magnetic ferrite tile and the ratio of the amounts.
As can be seen from comparison of comparative examples 7 to 22 with example 1, in the preparation process of the high-performance permanent magnetic ferrite tile provided in comparative examples 7 to 22, the magnetic properties of the permanent magnetic ferrite tile are affected by the material, ball and water usage ratio, the size of ball milling medium, the ball milling rotation speed and time in the process of classifying ball milling, and meanwhile, the control of the pre-sintering temperature and time, the control of the temperature and time in the sintering process and the control of the water content also affect the magnetic properties of the permanent magnetic ferrite tile, so that in the process of preparing the permanent magnetic ferrite tile, the magnetic properties of the permanent magnetic ferrite tile are affected by the regulation of parameters in the preparation process.
In summary, the high-performance permanent magnetic ferrite magnetic shoe and the preparation method thereof provided by the invention have the advantages that the prepared high-performance permanent magnetic ferrite magnetic shoe has higher remanence, coercivity, intrinsic coercivity and maximum magnetic energy product, and meanwhile, the preparation method is simple, convenient to operate and low in cost, and is suitable for industrial production.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The high-performance permanent magnetic ferrite magnetic shoe is characterized by comprising the following raw material components in parts by weight:
55-60 parts of ferric oxide, 15-25 parts of strontium carbonate, 1-2 parts of calcium carbonate, 0.5-0.8 part of silicon dioxide, 0.5-2 parts of aluminum oxide, 0.1-0.3 part of boric acid, 0.1-0.2 part of cosolvent, 0.3-0.6 part of dispersing agent and 0.5-1.2 part of forming agent.
2. The high performance permanent magnetic ferrite tile of claim 1 wherein the co-solvent is one of copper oxide, lead oxide, bismuth trioxide.
3. The high performance permanent magnet ferrite tile of claim 1, wherein the dispersant is sodium polyacrylate.
4. The high performance permanent magnet ferrite tile of claim 1, wherein the shaping agent is at least one of ammonium bicarbonate and calcium bicarbonate.
5. The method for manufacturing a high-performance permanent magnetic ferrite tile according to claim 1, comprising the steps of:
S1, weighing raw materials according to parts by weight, mixing ferric oxide and strontium carbonate, adding the mixture into a ball mill, performing primary ball milling to obtain slurry I, drying, performing presintering, and naturally cooling to room temperature to obtain a presintered material;
s2, mixing the presintered material with calcium carbonate, silicon dioxide, aluminum oxide, boric acid, cosolvent, dispersing agent and forming agent, and adding the mixture into a ball mill for secondary ball milling to obtain slurry II;
S3, dehydrating the slurry II, pressing the slurry II into a green body in a longitudinal magnetic field, sintering the green body, naturally cooling the green body to room temperature, and grinding and magnetizing the green body to obtain the permanent magnetic ferrite tile.
6. The preparation method of the high-performance permanent magnetic ferrite tile according to claim 5, wherein the mass ratio of the primary ball milling medium material to the ball to the water in the S1 is 1:6-6.5:1.5;
and/or the particle size of the ball milling medium in the primary ball milling in the step S1 is 5-6 mm;
and/or the rotating speed in the primary ball milling in the step S1 is 200-300 r/min, and the time is 20-24 h.
7. The method for preparing the high-performance permanent magnetic ferrite tile according to claim 5, wherein the temperature in the presintering process in S1 is 1100-1150 ℃, and the temperature is kept for 1.5-2 h.
8. The preparation method of the high-performance permanent magnetic ferrite tile according to claim 5, wherein the mass ratio of the secondary ball milling medium material to the ball to the water in the S2 is 1:11-12:2;
And/or the particle size of the ball milling medium in the secondary ball milling in the step S2 is 0.5-2 mm;
And/or the rotating speed in the secondary ball milling in the step S2 is 200-250 r/min, and the time is 18-20 h.
9. The method for preparing the high-performance permanent magnetic ferrite tile according to claim 5, wherein the water content is controlled to be 32% -36% in the dehydration process in S3.
10. The method for manufacturing a high-performance permanent magnetic ferrite tile according to claim 5, wherein the temperature in the sintering process in S3 is 1180-1250 ℃, and the temperature is kept for 1.5-2 hours.
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