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Vitreous additive, preparation method and application in preparation of ferrite permanent magnet material

A ferrite permanent magnet and additive technology, which is applied in the application of glass body type additives in the preparation of ferrite permanent magnet materials, and the field of glass body type additives and preparation, can solve the problem that secondary additives are difficult to be effectively and uniformly distributed and affect secondary Additives can improve the performance of ferrite permanent magnet materials, water-soluble additives are easy to lose, etc., to achieve the effects of easy industrial production, small grain size, and improved magnetic properties

Active Publication Date: 2021-08-24
成都锦钛精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing secondary additives include CaCO 3 , SiO 2 、H 3 BO 3 、Al 2 o 3 , SrSO 4 , La 2 o 3 , B 2 o 3 、Bi 2 o 3 , kaolin, etc., when using, add two or more secondary additives according to the needs. Since the total amount of secondary additives is generally 0.5-4% of the mass of ferrite calcined material, the amount of each secondary additive The amount is very small, resulting in the loss of some water-soluble additives, and it is difficult to effectively and evenly distribute the secondary additives in the slurry and green body, thus affecting the improvement effect of the secondary additives on the performance of ferrite permanent magnet materials

Method used

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  • Vitreous additive, preparation method and application in preparation of ferrite permanent magnet material
  • Vitreous additive, preparation method and application in preparation of ferrite permanent magnet material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, the method steps of the preparation of the glass type additive are as follows:

[0036] (1) ingredients and mixes

[0037] The raw material is analyzed to analyze pure CaO powder, analyzed pure SiO 2 Powder and analysis of pure Mo powder, the mass percentage of CaO powder is 23.8%, SiO 2 The mass percentage of the powder is 57.1%, and the mass percentage of Mo powder is 19.1%, and the MO is Al. 2 O 3 And B 2 O 3 And Al 2 O 3 Bind 2 O 3 The mass ratio is 3: 1; the measured raw material powder is mixed with a drum ball mill drying ball mill mix, and the mass ratio of dry ball mill and grinding ball is 1: 8;

[0038] (2) Sintering and quenching

[0039] The mixed homogeneous raw material powder was tapered from room temperature to 1450 ° C for 1.5 h under normal pressure, and then the sintered product was placed directly in the room temperature deionized water to obtain a glass body;

[0040] (3) Broken and dry

[0041] The type of glass was crushed to 0.5 μ...

Embodiment 2

[0062] In this embodiment, the method steps of the preparation of the glass type additive are as follows:

[0063] (1) ingredients and mixes

[0064] The raw material is analyzed to analyze pure CaO powder, analyzed pure SiO 2 Powder and analysis of pure Mo powder, the mass percentage of CaO powder is 27.3%, SiO 2 The mass percentage of the powder is 41%, and the mass percentage of Mo powder is 31.7%, and the MO is Al. 2 O 3 , B 2 O 3 Bi 2 O 3 And their mass ratio Al 2 O 3 : B 2 O 3 : BI 2 O 3 = 1: 2: 4; the measured raw material powder is mixed with a drum ball mill drying ball mill, and the mass ratio of dry ball mill and grinding ball is 1:10;

[0065] (2) Sintering and quenching

[0066] The mixed homogeneous raw material powder was tapered from room temperature to 1350 ° C for 2 h at normal pressure of 3 ° C / min, and then the sintered product was directly placed directly in liquid nitrogen gas cold quenching to obtain a glass body;

[0067] (3) Broken and dry

[0068] The t...

Embodiment 3

[0090] In this embodiment, the method steps of the preparation of the glass type additive are as follows:

[0091] (1) ingredients and mixes

[0092] The raw material is analyzed to analyze pure CaO powder, analyzed pure SiO 2 Powder and analysis of pure Mo powder, the mass percentage of CaO powder is 19.2%, SiO 2 The mass percentage of the powder is 33.4%, and the mass percentage of Mo powder is 47.4%, and the MO is Al. 2 O 3 , B 2 O 3 , LA 2 O 3 Bi 2 O 3 And their mass ratio Al 2 O3 : B 2 O 3 : La 2 O 3 : BI 2 O 3 = 1: 2: 2: 3; good measure of each raw material powder using a dry ball milling drum uniformly mixed, and the material mass ratio of 1:10 balls dry milling;

[0093] (2) Sintering and quenching

[0094] The mixed uniform raw material powder was tapered from room temperature to 1450 ° C for 1 h at normal pressure, and then the sintered product was directly placed directly in the room temperature distilled water to obtain a glass body;

[0095] (3) Broken and dry

[0096...

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Abstract

The vitreous additive of the present invention, with CaO powder, SiO 2 Powder and MO powder are used as raw materials, the mass percentage of CaO powder is 10% to 30%, SiO 2 The mass percentage of the powder is 20% to 60%, the mass percentage of the MO powder is 10% to 50%, and the MO is Al 2 o 3 , B 2 o 3 , La 2 o 3 、Bi 2 o 3 At least two of them, each raw material powder is uniformly mixed and sintered, and then rapidly cooled and quenched to form a vitreous body, and the vitreous body is broken to obtain a vitreous additive. The steps of the preparation method of the above-mentioned vitreous additive include: (1) batching and mixing; (2) sintering and quenching; (3) crushing and drying. The test shows that compared with the ferrite permanent magnet material prepared by conventional secondary additives, the ferrite permanent magnet material prepared by using the vitreous additive of the present invention has significantly improved magnetic properties, especially the magnitude of coercive force improvement is very large. big.

Description

Technical field [0001] The present invention belongs to the field of ferrite permanent magnet material, which relates to glass-based additives and methods of preparation, and the application of glass-based additives in the preparation of ferrite permanent magnet materials. Background technique [0002] The ferrite permanent magnet material has always proportioned in the market due to its stable performance and low prices. As the integration of electronic devices, the ferrite permanent magnet material is required to have higher magnetic properties. In order to achieve this, the density of the magnet is adjusted by adding the secondary additive to achieve magnetic properties by adding the secondary additive. [0003] Existing secondary additives include Caco 3 SiO 2 H 3 BO 3 Alla 2 O 3 SRSO 4 , LA 2 O 3 , B 2 O 3 , BI 2 O 3 , Kaolin, etc., when used, two or more secondary additives are added as needed, and since the total amount of the secondary additive is generally 0.5 to 4% of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00C03C6/04C04B35/26C04B35/622H01F1/11
CPCC03C1/00C03C12/00C04B35/2691C04B35/622C04B2235/3213C04B2235/36C04B2235/365C04B2235/6562C04B2235/6567C04B2235/77H01F1/11
Inventor 王怡伟陈一可
Owner 成都锦钛精工科技有限公司