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Ferrite magnetic-isolating material

A ferrite and magnetic isolation technology, which is applied in the field of ferrite magnetic isolation materials, can solve the problems of inability to achieve magnetic isolation, no magnetic isolation materials, and inability to achieve magnetic isolation.

Inactive Publication Date: 2015-09-02
程凯芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally, metal and non-metallic materials cannot achieve magnetic isolation. Magnetic isolation needs to short-circuit the magnetic force lines and form a magnetic shield. For example, lead can isolate X-rays, but it cannot isolate magnetic fields. At present, high-power permanent magnet motors and motor rotors are used in vehicles. Magnetic circuit design, in order to eliminate high-order harmonics, air magnetic isolation is used. So far, there is no ideal magnetic isolation material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A ferrite magnetic isolation material, including the main component Fe 2 o 3、 BaO, SrO and trace additives, the molar ratio of the main component content is, Fe 2 o 3 : 55%, BaO: 20%, SrO: 25%, the molar ratio of the trace additives and the weight sum of the three main components is: La: 0.08%, Co: 0.15%, talcum powder: 3%.

[0019] The preparation method of above-mentioned ferrite magnetic isolation material, its steps are:

[0020] The first step, according to the molar ratio batching of following composition and content: Fe 2 o 3 : 53%, BaO: 20%, SrO: 25%, additionally add trace additives, and the molar ratio of the trace additives to the weight of the three main components is: La: 0.08%, Co: 0.15%, Talc powder: 3%, then mix well.

[0021] The second step, ball milling: mill the material powder obtained in the first step in a ball mill for 2 hours to make the powder particles uniform;

[0022] The third step is pulping and compacting. The powder obtained in t...

Embodiment 2

[0026] A ferrite magnetic isolation material, including the main component Fe 2 o 3、 BaO, SrO and trace additives, the molar ratio of the main component content is, Fe 2 o 3 : 50%, BaO: 22%, SrO: 28%, the molar ratio of the trace additives and the weight sum of the three main components is: La: 0.18%, Co: 0.30%, talcum powder: 8%.

[0027] The preparation method of above-mentioned ferrite magnetic isolation material, its steps are:

[0028] The first step, according to the molar ratio batching of following composition and content: Fe 2 o 3 : 50%, BaO: 22%, SrO: 28%, additionally add trace additives, and the molar ratio of the trace additives to the weight of the three main components is: La: 0.18%, Co: 0.30%, Talc powder: 8%, then mix well.

[0029] The second step, ball milling: mill the powder obtained in the first step in a ball mill for 1.5 hours to make the powder particles uniform;

[0030] The third step is pulping and compacting. The powder obtained in the sec...

Embodiment 3

[0033] A ferrite magnetic isolation material, including the main component Fe 2 o 3、 BaO, SrO and trace additives, the molar ratio of the main component content is, Fe 2 o 3 : 53%, BaO: 22%, SrO: 25%, the molar ratio of the trace additive and the sum of the weight of the three main components is: La: 0.1%, Co: 0.2%, talcum powder: 4%.

[0034] The preparation method of above-mentioned ferrite magnetic isolation material, its steps are:

[0035] The first step, according to the molar ratio batching of following composition and content: Fe 2 o 3 : 53%, BaO: 22%, SrO: 25%, additionally add trace additives, the molar ratio of the trace additives to the sum of the weight of the three main components is: La: 0.1%, Co: 0.2%, Talc powder: 4%, then mix well.

[0036] The second step, ball milling: mill the powder obtained in the first step in a ball mill for 1.5 hours to make the powder particles uniform;

[0037] The third step is pulping and compacting. The powder obtained in...

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Abstract

The invention relates to a ferrite magnetic-isolating material, which comprises main components Fe2O3, BaO and SrO and trace additives. The ferrite magnetic-isolating material is characterized by comprising the following main components by molar ratio: 50%-55% of Fe2O3, 20%-25% of BaO and 22%-28% of SrO; and the trace additives is one or more of the following main components by molar ratio: 0.08%-0.20% of La, 0.15%-0.30% of Co and 3%-8% of talcum powder. The ferrite magnetic-isolating material has a resistance value of 3-5 gigaohms, is a relatively good insulator, and does not generate a vortex phenomenon when working in a magnetic field. In addition, electromagnetic directional processing is carried out during compaction; magnetic crystal growth is formed in the firing process; the ferrite magnetic-isolating material belongs to a magnetocrystalline chain which is formed by uniaxial magnetocrystalline; the uniaxial magnetocrystalline chain has a hindering effect on a magnetic line, and is high in magnetic reluctivity; and the magnetic reluctivity of a magnetocrystalline clearance named a magnetic wall is low, so that the magnetic line can generate a polarization effect by the uniaxial magnetocrystalline chain.

Description

technical field [0001] The invention relates to a ferrite magnetic isolation material. Background technique [0002] Generally, metal and non-metallic materials cannot achieve magnetic isolation. Magnetic isolation needs to short-circuit the magnetic force lines and form a magnetic shield. For example, lead can isolate X-rays, but it cannot isolate magnetic fields. At present, high-power permanent magnet motors and motor rotors are used in vehicles. In the magnetic circuit design, in order to eliminate high-order harmonics, air is used to isolate the magnetic field. So far, there is no ideal magnetic isolation material. Contents of the invention [0003] The invention provides a magnetic isolation material with a better magnetic isolation effect, and the adopted technical solution is: a ferrite magnetic isolation material, including the main component Fe 2 o 3、 BaO, SrO and trace additives, characterized in that: the molar ratio of the main component content is, Fe 2 o ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 程凯芬张文武张志强
Owner 程凯芬
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