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Novel pre-sintering treatment process of high-permeability magnetic core and raw material mixing mold thereof

A technology with high magnetic permeability and processing technology, which is used in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve problems such as poor stability, and achieve the effect of high stability and high practical value

Pending Publication Date: 2021-01-15
海宁市星火电子有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One-time molding under a single temperature condition leads to poor stability

Method used

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  • Novel pre-sintering treatment process of high-permeability magnetic core and raw material mixing mold thereof
  • Novel pre-sintering treatment process of high-permeability magnetic core and raw material mixing mold thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The novel pre-sintering process of the high permeability magnetic core includes the following steps:

[0032] A. Ingredients: Fe2O3, Mn3O4, ZnO are taken according to the mass ratio of 5:4:4, and the above three raw materials are fully mixed to obtain a primary raw material;

[0033] B. Ball milling: according to the mass ratio, add 2 parts of decaglycerol monostearate to every 100 parts of magnetic core raw materials to obtain secondary raw materials. After drying and crushing, pass through a 200-400 mesh sieve, and obtain three raw materials after filtration;

[0034] C, pre-burning: the three raw materials in 70% CO 2 +20%H 2 In +10% CO atmosphere, the temperature was raised to 890°C, kept for 4 hours, and then heated in 75% N 2 +25% Ar atmosphere to cool down to 610°C, hold for 2 hours, and then in 60% H 2 In +40% CO atmosphere, the temperature was raised to 900°C, kept for 5 hours, and then in 50% Ar + 50% CO 2 Lower the temperature in the atmosphere to 590°C ...

Embodiment 2

[0043] The novel pre-sintering process of the high permeability magnetic core includes the following steps:

[0044] A. Ingredients: Fe2O3, Mn3O4, ZnO are taken according to the mass ratio of 5:4:4, and the above three raw materials are fully mixed to obtain a primary raw material;

[0045] B. Ball milling: according to the mass ratio, add 3 parts of decaglycerol monostearate to every 100 parts of magnetic core raw materials to obtain secondary raw materials. After drying and crushing, pass through a 200-400 mesh sieve, and obtain three raw materials after filtration;

[0046] C, pre-burning: the three raw materials in 70% CO 2 +20%H 2 In +10% CO atmosphere, the temperature was raised to 930°C, kept for 5 hours, and then heated in 75% N 2 +25% Ar atmosphere to cool down to 660°C, hold for 3 hours, and then in 60% H 2 In +40% CO atmosphere, the temperature was raised to 950 ° C, kept for 6 hours, and then in 50% Ar + 50% CO 2 The temperature was lowered to 630°C in the atm...

Embodiment 3

[0055] The novel pre-sintering process of the high permeability magnetic core includes the following steps:

[0056] A. Ingredients: Fe2O3, Mn3O4, ZnO are taken according to the mass ratio of 5:4:4, and the above three raw materials are fully mixed to obtain a primary raw material;

[0057] B. Ball milling: according to the mass ratio, add 2 parts of decaglycerol monostearate to every 100 parts of magnetic core raw materials to obtain secondary raw materials. After drying and crushing, pass through a 200-400 mesh sieve, and obtain three raw materials after filtration;

[0058] C, pre-burning: the three raw materials in 70% CO 2 +20%H 2 In +10% CO atmosphere, the temperature was raised to 910°C, kept for 4 hours, and then heated in 75% N 2 +25% Ar atmosphere to cool down to 630°C, hold for 3 hours, and then in 60% H 2 In +40% CO atmosphere, the temperature was raised to 920 ° C, kept for 5 hours, and then in 50% Ar + 50% CO 2 The temperature was lowered to 600°C in the atm...

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Abstract

The invention provides a novel pre-sintering treatment process of a high-permeability magnetic core and a raw material mixing mold thereof, which belong to the technical field of magnetic core manufacturing. The problem that in the prior art, stability is poor is solved. The novel pre-sintering treatment process of the high-permeability magnetic core comprises the following steps: A burdening, B ball milling, and C presintering. The mixing mold comprises a rack, a driving piece, a charging barrel and a discharging assembly, the charging barrel is cylindrical and is axially and fixedly connected with the rack, the driving piece is fixedly connected with the rack and is connected with the charging barrel, a feeding port communicated with an inner cavity of the charging barrel is formed in the upper end of the charging barrel, a discharging port communicated with the inner cavity of the charging barrel is formed in the lower end of the charging barrel, the discharging assembly is locatedat the discharging port, the discharging assembly blocks the discharging port in the initial state, and the discharging port can be opened after the discharging assembly acts. The novel pre-sinteringtreatment process of the high-permeability magnetic core is high in stability, and the raw material mixing mold is high in stability.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a novel pre-sintering treatment process of a high-permeability magnetic core and a raw material mixing mold thereof. Background technique [0002] The raw materials of the magnetic core are added to the forming mold through five processes of mixing, pre-calcination, coarse crushing, sand milling, and spray granulation, and the soft magnet is produced through steps such as molding, sintering, sorting, grinding, inspection, and packaging. Oxygen core. [0003] Among them, pre-firing is an important process, and the existing pre-firing operation is usually formed at one time in a high-temperature environment. One-time molding under a single temperature condition leads to poor stability. Contents of the invention [0004] The first object of the present invention is to provide a new pre-sintering process for high permeability magnetic cores to solve the above problems in the prio...

Claims

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Application Information

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IPC IPC(8): H01F41/02
CPCH01F41/0246
Inventor 钱林玉钱明兴林辉孙洪明吴海曙
Owner 海宁市星火电子有限责任公司