A ferrite magnetic isolation material

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

Inactive Publication Date: 2018-02-06
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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PUM

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Abstract

The present invention relates to a ferrite magnetic isolation material, comprising main components Fe2O3, BaO, SrO and trace additives, characterized in that: the molar ratio of the main component content is Fe2O3: 50-55%, BaO: 20‑25%, SrO: 22‑28%, the trace additive is one or more of the following ingredients, and the molar ratio to the sum of the weight of the three main components is: La: 0.08‑0.20 %, Co: 0.15‑0.30%, Talc: 3‑8%. The ferrite magnetic isolation material of the present invention has the resistance value of 3-5 megohm, is a kind of better insulator, and it can not produce eddy current phenomenon when working in the magnetic field; During the firing process, the magnetocrystalline growth is formed, which belongs to the uniaxial magnetocrystal to form the magnetocrystal chain. The uniaxial magnetocrystal chain has a hindering effect on the magnetic force line, and its reluctance rate is high. It is called the reluctance rate of the magnetic wall in the magnetocrystal gap. Therefore, the uniaxial magnetic crystal chain can make the magnetic lines of force produce polarization.

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 Patents(China)
IPC IPC(8): H01F1/36C04B35/26C04B35/622
Inventor 程凯芬张文武张志强
Owner 程凯芬
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