Manganese zinc ferrite sintering anti-adhesion agent and manganese zinc ferrite anti-adhesion sintering method

Abstract

The invention relates to a manganese zinc ferrite sintering anti-adhesion agent and a manganese zinc ferrite anti-adhesion sintering method, and the main component of the anti-adhesion agent is zirconium oxide powder. The method has the beneficial effects that the zirconium oxide powder can separate adjacent manganese zinc ferrite blanks, keeps stable chemical properties under a high-temperature sintering condition, does not decompose and does not release any gas influencing the sintering atmosphere, so that the manganese zinc ferrite can be prevented from adhesion deformation during sintering, the dimensional accuracy of a final product is improved, and the product quality is improved. And the quality of the manganese zinc ferrite product is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of ferrite production, in particular to a manganese-zinc ferrite sintering anti-adhesion agent and a manganese-zinc ferrite anti-adhesion sintering method. Background Art

[0002] At present, the production process of ferrite generally includes primary sanding, pre-sintering, secondary sanding, spray granulation, molding, and sintering. Among them, sintering is the key node of ferrite production. The purpose is to make the pressed ferrite powder solid-melt into a whole to achieve the required physical properties. During the sintering process, the ferrite is generally stacked in a close-packed sintering manner. The sintering process of ferrite is extremely complicated, including a series of physical changes such as water evaporation, binder volatilization, liquid phase initiation, solid phase reaction, and crystal phase structure change. Under high temperature, a series of reactions on the ferrite and the impurity gas evaporated from the ferrite make it easy for adjacent ferrites to produce problems such as adhesion and deformation. The higher the sintering temperature, the larger the weight and volume of the ferrite, the more stacked, and the more serious the adhesion phenomenon, which has a great adverse effect on the performance, size specifications, etc. of the ferrite product. Among various ferrites, manganese-zinc ferrite is widely used in electronic products, communication equipment, medical equipment and other fields due to its unique magnetic properties such as high resistivity, low power loss, good magnetic permeability, low coercivity and high temperature resistance. During the production process of manganese-zinc ferrite, the sintering temperature is generally 1200-1500℃, and the sintering time is generally 2-5 hours. For higher requirements, the sintering time can reach 6-12 hours. When manganese-zinc ferrite is sintered for a long time, it is easy to cause adhesion.

[0003] In order to solve the problem of sintering adhesion and deformation of manganese-zinc ferrite, the prior art generally adopts post-sintering grinding, lowering the sintering temperature, using corundum sand coating and other treatment methods. The prior art treatment methods for sintering adhesion and deformation of manganese-zinc ferrite have the following problems:

[0004] (1) After sintering, the adhesion surface is ground, but due to the high hardness and low toughness of manganese-zinc ferrite, the processing is difficult and costly, which cannot substantially solve the problem.

[0005] (2) Lower the sintering temperature to reduce the adhesion phenomenon, but the decrease in sintering temperature will reduce the performance of manganese-zinc ferrite after magnetization.

[0006] Therefore, it is necessary to propose an improvement plan for the existing technology. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a manganese-zinc ferrite sintering anti-adhesion agent and a manganese-zinc ferrite anti-adhesion sintering method, which solves the problem of adhesion and deformation of manganese-zinc ferrite during sintering in the prior art.

[0009] (II) Technical solution

[0010] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0011] In a first aspect, the present invention provides a manganese-zinc ferrite sintering anti-adhesion agent, wherein the anti-adhesion agent comprises zirconium oxide powder, and the particle size of the zirconium oxide powder does not exceed 100 nm.

[0012] According to a preferred embodiment of the present invention, the anti-adhesion agent is a slurry, which also includes a solvent, and the solvent is a liquid that can be completely evaporated before the sintering temperature reaches 800° C. and does not react with the manganese-zinc ferrite.

[0013] According to a preferred embodiment of the present invention, the anti-adhesion agent is a slurry, which also includes an inorganic adhesive, and the inorganic adhesive is a material with chemically stable properties at 1300-1400°C, and the inorganic binder is at least one of bentonite and clay; the particle size of the inorganic adhesive does not exceed 100nm.

[0014] According to a preferred embodiment of the present invention, the solvent is water or anhydrous ethanol.

[0015] According to a preferred embodiment of the present invention, in the slurry, the zirconium oxide powder is 30-50 parts by mass, the inorganic binder is 15-25 parts by mass, and the solvent is 70-90 parts by mass.

[0016] According to a preferred embodiment of the present invention, the slurry further contains ceramic short fibers and ceramic whiskers, the length of the ceramic short fibers is distributed in the range of 0.5-8 mm; and both the ceramic short fibers and the ceramic whiskers are not materials with chemically stable properties at 1300-1400°C.

[0017] According to a preferred embodiment of the present invention, the slurry is composed of: 30-50 parts by mass of zirconium oxide powder, 20-30 parts by mass of inorganic binder, 1-5 parts by mass of ceramic staple fibers, 5-9 parts by mass of ceramic whiskers and 80-100 parts by mass of solvent.

[0018] In a second aspect, the present invention also provides a method for sintering manganese-zinc ferrite, wherein the anti-adhesion agent described in any of the above embodiments is applied between two overlapping blanks in a stack of manganese-zinc ferrite blanks to be sintered, and then sintering is performed at 1300-1400°C.

[0019] According to a preferred embodiment of the present invention, the gas generated during the heating process is exhausted before the sintering temperature is raised to 800°C, and a sintering atmosphere with a preset component is filled in to a predetermined pressure after 800°C, and the temperature is continued to be raised to 1300-1400°C for normal sintering, and the sintering time is 2-10h.

[0020] (III) Beneficial effects

[0021] The beneficial effects of the present invention are:

[0022] (1) The present invention provides a manganese-zinc ferrite sintering anti-adhesion agent, which uses zirconium oxide powder as an anti-adhesion agent during the sintering process. The zirconium oxide powder can separate adjacent batches of manganese-zinc ferrite, so that the impurity gas generated by the manganese-zinc ferrite blank during the sintering process (polyvinyl alcohol needs to be used as an adhesive during the production process of the manganese-zinc ferrite blank) can be diffused out normally, rather than reacting between the blanks and causing adhesion. The use of zirconium oxide powder as an anti-adhesion agent is convenient in the application process, does not contain any organic adhesive, does not decompose any gas component when repeatedly heated at high temperature for a long time, does not affect the sintering atmosphere of the manganese-zinc ferrite, does not react with the blank, does not affect the performance of the manganese-zinc ferrite after magnetization, improves the sintering quality of the product, and increases the qualified rate.

[0023] (2) The present invention further prepares slurry by mixing zirconium oxide powder with solvent or further adds an appropriate amount of inorganic adhesive. After the slurry is prepared, it can improve the convenience of applying to the blank, avoid dust, ensure the uniformity of the slurry coating on the surface of the blank, avoid uneven thickness or even partial areas without zirconium oxide coating, and realize automatic slurry coating. Compared with organic adhesives, inorganic adhesives do not decompose during the sintering process, do not produce gases that change and affect the sintering atmosphere, and do not cause significant changes in the slurry thickness to affect the neat stacking and stacking of the blanks.

[0024] When the anti-adhesive agent is in the form of a slurry, the anti-adhesive agent can be evenly attached to the surface of the manganese-zinc ferrite, and can be applied to the sintering process of manganese-zinc ferrites of various shapes and types. When the anti-adhesive agent is a mixed slurry composed of zirconium oxide powder and solvent, the zirconium oxide powder can be evenly coated on the surface of the manganese-zinc ferrite, which is conducive to the sintering of manganese-zinc ferrite with higher precision. When the anti-adhesive agent is a mixed slurry composed of zirconium oxide powder, inorganic adhesive and solvent, the solid material produced by the anti-adhesive agent during the sintering process can not only prevent the manganese-zinc ferrite from adhering to each other, but also form an anti-adhesion gasket after the sintering is completed, which can be repeatedly used in the sintering process of the same type of manganese-zinc ferrite to reduce cost investment.

[0025] (3) Furthermore, by adding ceramic short fibers and ceramic whiskers to the slurry and applying the slurry to the surface of the blank, it is possible not only to prevent the manganese-zinc ferrite from sticking and deforming during the first sintering process, but also to obtain a sintering pad with higher strength after sintering. These pads can be repeatedly used in subsequent sintering processes.

[0026] (4) Furthermore, bentonite or clay is used as an inorganic adhesive. These inorganic adhesives are mixed into the slurry to increase the viscosity and adhesion of the slurry, so as to facilitate operations such as brushing on the surface of the blank, and the coating thickness of the slurry can be accurately controlled. However, since bentonite or clay contains a small amount of calcium carbonate impurities, this part of calcium carbonate impurities will decompose at high temperature to produce carbon dioxide, and carbon dioxide will change the sintering atmosphere; therefore, preferably during the sintering process, before the sintering temperature is raised to 800°C, the gas (calcium carbonate decomposition gas and solvent volatiles) generated during the heating process is exhausted, and after 800°C, a sintering atmosphere of a preset component is filled to a predetermined pressure, and the temperature is continued to be raised for sintering. The carbon-containing gas that may affect the sintering atmosphere is removed by exhaustion to ensure the sintering quality of the ferrite. DETAILED DESCRIPTION

[0027] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods.

[0028] The present invention provides a manganese zinc ferrite sintering anti-adhesion agent, which can be a powder, including zirconium oxide powder. Zirconium oxide can stably exist for a long time at the sintering temperature and will not react with manganese zinc ferrite; the particle size of zirconium oxide should be less than or equal to 100nm.

[0029] Preferably, the anti-adhesion agent can be a slurry, in which zirconium oxide powder is dispersed in a solvent, and the solvent is a liquid that can completely evaporate (discharged by pumping) before the sintering temperature reaches 800°C and does not react with manganese-zinc ferrite before evaporation; wherein the mass ratio of zirconium oxide powder to solvent is 1:1-2; the solvent in the slurry will gradually evaporate from the slurry during the sintering temperature increase process, and the gas generated after evaporation can be discharged in the subsequent process without affecting the sintering.

[0030] Preferably, the anti-adhesive agent may be a slurry, which includes an inorganic adhesive in addition to zirconium oxide powder and a solvent. The inorganic adhesive is a material that is chemically stable at 1300-1400° C., has viscosity at room temperature and is inert at high temperature.

[0031] The particle size of the inorganic binder should not exceed 100nm. After the solvent evaporates, the inorganic binder and zirconium oxide can form a solid plate-like material during sintering, which can prevent the manganese-zinc ferrite from sticking to each other, and the solid plate-like material can also be normally separated from the manganese-zinc ferrite without sticking to the manganese-zinc ferrite.

[0032] Preferably, the inorganic adhesive may be at least one of bentonite or clay, and the solvent may be water or anhydrous ethanol, wherein the bentonite or clay may contain organic impurities, generally a very small amount of calcium carbonate and organic impurities, which will decompose before the sintering temperature. Therefore, before reaching the sintering temperature, the gas around the manganese-zinc ferrite blank may be evacuated, and then after replacing the gas of a predetermined composition, the temperature may continue to be raised to the sintering temperature without affecting the sintering effect of the manganese-zinc ferrite.

[0033] Preferably, the proportions of zirconium oxide powder, inorganic adhesive and solvent are as follows: 30-50 parts by mass of zirconium oxide powder, 15-25 parts by mass of inorganic adhesive, 70-90 parts by mass of solvent, and the viscosity of the slurry is in the range of 3-6 Pa·s. If the viscosity is too low, adjacent manganese-zinc ferrites cannot be fully separated during sintering, and the anti-adhesion effect is poor. If the viscosity is too high, the slurry coating is difficult and difficult to operate.

[0034] Preferably, the slurry also contains ceramic staple fibers and ceramic whiskers, the length of the ceramic staple fibers is distributed in the range of 0.5-8 mm; neither the ceramic staple fibers nor the ceramic whiskers are materials with stable chemical properties at 1300-1400°C. Among them, the ceramic staple fibers are at least one of aluminum silicate ceramic fibers, chromium-containing ceramic fibers, zirconium-containing ceramic fibers, polycrystalline alumina fibers and polycrystalline mullite fibers, and the length of the ceramic staple fibers is continuously distributed in the range of 0.5-8 mm; the ceramic whiskers are alumina whiskers or zirconium oxide whiskers. Further, the composition of the slurry is: 30-50 parts by mass of zirconium oxide powder, 20-30 parts by mass of inorganic adhesive, 1-5 parts by mass of ceramic staple fibers, 5-9 parts by mass of ceramic whiskers and 80-100 parts by mass of solvent. Ceramic staple fibers and ceramic whiskers also have high temperature resistance, and can make the sintered pad formed after the first sintering stronger, not easy to break, and can be used repeatedly, saving a lot of costs for the enterprise.

[0035] The present invention also provides a manganese-zinc ferrite sintering method, wherein the anti-adhesion agent of any of the above embodiments is applied between two overlapping blanks in a stack of manganese-zinc ferrite blanks to be sintered, and then sintering is performed at 1300-1400°C.

[0036] Furthermore, the gas generated during the heating process is exhausted before the sintering temperature is raised to 800°C, and after 800°C, a sintering atmosphere of a preset component is filled to a predetermined pressure, and the temperature is continued to be raised to 1300-1400°C for normal sintering. Through the exhaust, the gas generated by the decomposition of organic impurities or calcium carbonate contained in the inorganic adhesive is discharged to prevent it from being retained and affecting the sintering effect of the ferrite.

[0037] Preferably, when powder is used as an anti-adhesive agent, a layer of zirconium oxide powder can be sprinkled on the unsintered manganese zinc ferrite through a screen or a roller; for cost considerations, the thickness of the zirconium oxide powder should not exceed 1 mm, preferably 0.1-0.4 mm, and then sintering is performed normally.

[0038] Preferably, when using slurry as an anti-adhesive agent, during the sintering process, water vapor and impurity gases such as carbon dioxide should be discharged before the sintering temperature is raised to 800°C to prevent water vapor, carbon dioxide and other impurities from reacting with the manganese-zinc ferrite at a higher sintering temperature and affecting the quality of the manganese-zinc ferrite product. After reaching 800°C, the preset sintering atmosphere should be replaced and sintering should be carried out normally.

[0039] Preferably, when a slurry containing an inorganic binder is used as the anti-adhesion agent, the inorganic binder and zirconium oxide will form a solid material during sintering, and the solid material can be directly used as a manganese-zinc ferrite sintered anti-adhesion gasket.

[0040] Preferably, when using slurry as an anti-adhesion agent, the unsintered manganese zinc ferrite should be sintered as soon as possible after coating the anti-adhesion agent to prevent the unsintered manganese zinc ferrite from absorbing the solvent in the slurry and affecting the quality of the manganese zinc ferrite product; the coating thickness should be less than 2 mm, preferably 0.3-0.8 mm. In special cases, in order to obtain a large number of anti-adhesion gaskets, it is preferably 0.7-1.5 mm.

[0041] The present invention also provides a manganese-zinc ferrite sintered anti-adhesion gasket, which is obtained by sintering the anti-adhesion agent containing an inorganic adhesive as described above. The solid material formed by the inorganic adhesive and zirconium oxide during sintering can be reused as an anti-adhesion gasket; by adding ceramic short fibers and ceramic whiskers, on the one hand, these materials will not affect the coating performance of the slurry, and also maintain stable chemical properties during the sintering process, on the other hand, the ceramic short fibers and ceramic whiskers can greatly enhance the strength of the sintered gasket formed after sintering, and can be used repeatedly and multiple times.

[0042] In the following examples, the particle sizes of the inorganic binder and the zirconium oxide powder are all less than 100 nm.

[0043] Example 1

[0044] The present invention provides a manganese-zinc ferrite sintering anti-adhesion agent and a sintering method, wherein the anti-adhesion agent comprises zirconium oxide powder, and the particle size of the zirconium oxide powder does not exceed 100 nm. The manganese-zinc ferrite sintering method is as follows:

[0045] S1: preparing manganese-zinc ferrite raw materials, performing primary sand grinding, pre-burning, secondary sand grinding, and granulation on the raw materials, and pressing the granulated particles into H25×15×10 manganese-zinc ferrite cores to obtain manganese-zinc ferrite blanks.

[0046] S2: Sprinkle a layer of anti-adhesive agent on the manganese-zinc ferrite blank obtained in step S1 through a screen. The thickness of the anti-adhesive agent is about 0.3 mm. The anti-adhesive agent separates the manganese-zinc ferrite blanks to obtain manganese-zinc ferrite blanks sprinkled with the anti-adhesive agent.

[0047] S3: The manganese-zinc ferrite blank with anti-adhesive agent obtained in step S2 is sintered at 1350° C. for 7 hours to obtain a H25×15×10 manganese-zinc ferrite core.

[0048] Example 2

[0049] This embodiment provides a manganese-zinc ferrite sintering anti-adhesion agent and a sintering method. The anti-adhesion agent includes 40 parts of zirconium oxide powder, 10 parts of clay, and 70 parts of water. The particle size of the clay does not exceed 100 nm.

[0050] The sintering method of manganese zinc ferrite is as follows:

[0051] S1: preparing manganese-zinc ferrite raw materials, performing primary sand grinding, pre-burning, secondary sand grinding, and granulation on the raw materials, and pressing the granulated particles into H25×15×10 manganese-zinc ferrite cores to obtain manganese-zinc ferrite blanks.

[0052] S2: a layer of anti-adhesive agent is applied on the manganese-zinc ferrite blank obtained in S1 by using a soft wool brush. The thickness of the anti-adhesive agent is about 2 mm. The anti-adhesive agent separates the manganese-zinc ferrite blanks to obtain manganese-zinc ferrite blanks coated with the anti-adhesive agent.

[0053] S3: Sintering the manganese-zinc ferrite blank coated with the anti-adhesion agent obtained in step S2, and exhausting the sintering atmosphere before heating to 800°C; after reaching 800°C, filling with a preset sintering atmosphere, heating to 1400°C and sintering for 6 hours at a heat preservation temperature, and obtaining a H25×15×10 manganese-zinc ferrite core after sintering.

[0054] Example 3

[0055] This embodiment provides a manganese-zinc ferrite sintering anti-adhesive agent and a sintering method, which is different from the embodiment 2 in that the anti-adhesive agent includes 45 parts of zirconium oxide powder and 67.5 parts of water; the coating thickness is 1 mm. The sintering system is the same as that of the embodiment 2, and a H25×15×10 manganese-zinc ferrite magnetic core is obtained after sintering.

[0056] Example 4

[0057] This embodiment provides a manganese-zinc ferrite sintering anti-adhesion agent and sintering method. The difference from Example 2 is that the anti-adhesion agent includes 32 parts by mass of zirconium oxide powder, 20 parts by mass of clay, 2 parts by mass of polycrystalline alumina short fibers (1-3mm), 6 parts by mass of zirconium oxide whiskers, and 86 parts by mass of water; after sufficient stirring, a slurry is obtained, and the coating thickness during the sintering process is 2.5mm. Before heating to 800°C, the sintering atmosphere is evacuated; after reaching 800°C, the preset sintering atmosphere is filled, and the temperature is raised to 1400°C for heat preservation and sintering for 6h. After sintering, a H25×15×10 type manganese-zinc ferrite core is obtained.

[0058] Example 5

[0059] This embodiment provides a manganese-zinc ferrite sintering anti-adhesion agent and sintering method. The difference from Example 2 is that the anti-adhesion agent includes 40 parts by mass of zirconium oxide powder, 20 parts by mass of bentonite, 3 parts by mass of aluminum silicate ceramic short fibers (1-3mm), 5 parts by mass of aluminum oxide whiskers, and 90 parts by mass of water; after sufficient stirring, a slurry is obtained, and the coating thickness during the sintering process is 2.6mm. Before heating to 800°C, the sintering atmosphere is evacuated; after reaching 800°C, the preset sintering atmosphere is filled, and the temperature is raised to 1400°C for heat preservation and sintering for 6 hours. After sintering, a H25×15×10 type manganese-zinc ferrite core is obtained.

[0060] Comparative Example 1

[0061] This comparative example provides a method for sintering manganese-zinc ferrite, which is different from Example 1 in that no anti-adhesive agent is used and direct sintering is performed.

[0062] Comparative Example 2

[0063] This comparative example provides a method for sintering manganese-zinc ferrite, which differs from Example 1 in that no anti-adhesive agent is used and low-temperature sintering is adopted, that is, the sintering temperature is 900°C.

[0064] The sintered manganese-zinc ferrite cores (n=3) of the above-mentioned embodiments and comparative examples were measured for size and observed for surface flatness. The results are shown in Table 1.

[0065] Table 1 Dimensional test results of materials in the embodiments and comparative examples

[0066]

[0067] As can be seen from the above table, the dimensional accuracy of the manganese-zinc ferrite cores prepared by the sintering methods of the present embodiments 1-5 meets the requirements, and the dimensional uniformity between the various manganese-zinc ferrite core samples is good, and the surface of the core is flat and smooth, which shows that the sintering method of the present invention can avoid adhesion and deformation between the blanks, and can achieve a good sintering effect. Although comparative example 2 adopts a lower sintering temperature, the sintering effect is still not ideal. This is mainly because no anti-adhesion agent is used between the blanks, even if low-temperature sintering, it is still inevitable that the core will be adhered and deformed, affecting the dimensional accuracy of the product. In addition, low-temperature sintering is not conducive to obtaining a core product with high initial magnetic permeability and low power loss, so using low-temperature sintering is not a preferred solution. Among them, the anti-adhesion agent of Example 4-5 contains ceramic staple fibers, ceramic whiskers, zirconium oxide powder and inorganic adhesive, which are mixed into the anti-adhesion agent. The coating thickness is appropriately increased during the coating process, which can prevent the manganese-zinc ferrite blanks from sticking and deforming during the first sintering process. After sintering, a pad with a certain thickness and strength is formed. The pad can be reused many times in the subsequent sintering process, saving costs for the enterprise.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A manganese-zinc ferrite sintering anti-adhesion agent, characterized in that: The anti-adhesion agent comprises zirconium oxide powder, and the particle size of the zirconium oxide powder does not exceed 100 nm.

2. The anti-adhesion agent according to claim 1, characterized in that The anti-adhesion agent is a slurry, which also includes a solvent. The solvent is a liquid that can be completely evaporated before the sintering temperature reaches 800° C. and does not react with the manganese-zinc ferrite.

3. The anti-adhesion agent according to claim 2, characterized in that The anti-adhesion agent is a slurry, which also includes an inorganic adhesive. The inorganic adhesive is a material with stable chemical properties at 1300-1400° C. The inorganic adhesive is at least one of bentonite and clay. The particle size of the inorganic adhesive does not exceed 100 nm.

4. The anti-adhesion agent according to claim 2 or 3, characterized in that The solvent is water or anhydrous ethanol.

5. The anti-adhesion agent according to claim 2, characterized in that In the slurry, the zirconium oxide powder accounts for 30-50 parts by mass, the inorganic binder accounts for 15-25 parts by mass, and the solvent accounts for 70-90 parts by mass.

6. The anti-adhesion agent according to claim 2, characterized in that The slurry also contains ceramic short fibers and ceramic whiskers. The length of the ceramic short fibers is distributed in the range of 0.5-8 mm. Both the ceramic short fibers and the ceramic whiskers are materials with stable chemical properties at 1300-1400° C.

7. The anti-adhesion agent according to claim 6, characterized in that The ceramic staple fibers are at least one of aluminum silicate ceramic fibers, chromium-containing ceramic fibers, zirconium-containing ceramic fibers, polycrystalline alumina fibers and polycrystalline mullite fibers, and the lengths of the ceramic staple fibers are continuously distributed in the range of 0.5-8 mm; the ceramic whiskers are alumina whiskers or zirconium oxide whiskers.

8. The anti-adhesion agent according to claim 6 or 7, characterized in that The slurry is composed of: 30-50 parts by mass of zirconium oxide powder, 20-30 parts by mass of inorganic adhesive, 1-5 parts by mass of ceramic staple fibers, 5-9 parts by mass of ceramic whiskers and 80-100 parts by mass of solvent.

9. A method for sintering manganese-zinc ferrite to prevent adhesion, characterized in that: The anti-adhesion agent according to any one of claims 1 to 8 is applied between two overlapping green sheets in a stack of manganese-zinc ferrite green sheets to be sintered, and then sintering is carried out at 1300-1400°C.

10. According to the anti-adhesion sintering method of manganese-zinc ferrite according to claim 9, the gas generated during the heating process is exhausted before the sintering temperature is raised to 800°C, and a sintering atmosphere with a preset component is filled to a predetermined pressure after 800°C, and the temperature is continued to be raised to 1300-1400°C for normal sintering.

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