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Permanent magnetic ferrite material and preparation method thereof

A permanent magnet ferrite and raw material technology, applied in the direction of inductor/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., can solve the problems that do not meet the needs of high-end motors and difficult magnetic properties, and achieve improved magnetic properties , cost reduction effect

Inactive Publication Date: 2018-08-28
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic properties of permanent ferrite materials that do not contain Co elements are difficult to meet Br ≥ 4200Gs, Hcb ≥ 3700Oe, Hcj ≥ 4200Oe at the same time, which does not meet the needs of some high-end motors.

Method used

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  • Permanent magnetic ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A permanent ferrite material containing the following main components in parts by weight:

[0031] SrCO 3 0.1 parts, CaCO 3 0.1 parts, La 2 o 3 0.1 parts, Fe 2 o 3 80 parts, ZnO 0.05 parts; the average particle size of each raw material in the main component is not more than 5μm, and the total weight of the main component is 2kg;

[0032] The permanent ferrite material contains an additive composed of the following components, the additive is alumina, and the additive amount is 1.0 parts by weight.

[0033] A preparation method of a permanent magnet ferrite material, comprising the following steps:

[0034] a) Batching: batching is carried out according to the above-mentioned components and contents, and the main components are mixed to obtain a mixture;

[0035] b) primary ball milling: ball milling the mixture for 3 hours to obtain primary ball milling material, the milling speed is 50rpm; the weight ratio of the mixture, balls and water during ball milling...

Embodiment 2

[0042] A permanent ferrite material containing the following main components in parts by weight:

[0043] SrCO 3 13 parts, BaCO 3 0.1 parts, CaCO 3 3 copies, La 2 o 3 1.5 parts, Fe 2 o 3 90 parts, ZnO 0.2 parts; the average particle size of each raw material in the main component is not more than 5μm, and the total weight of the main component is 2kg;

[0044] The permanent ferrite material contains additives composed of the following components. The additives are composed of silicate, carbonate, alumina, bismuth oxide and silicon dioxide in a weight ratio of 1:1:1:1:1. The amount of additives added It is 1.14 parts by weight.

[0045] A preparation method of a permanent magnet ferrite material, comprising the following steps:

[0046] a) Batching: batching is carried out according to the above-mentioned components and contents, and the main components are mixed to obtain a mixture;

[0047] b) primary ball milling: ball milling the mixture for 6 hours to obtain ...

Embodiment 3

[0054] A permanent ferrite material containing the following main components in parts by weight:

[0055] SrCO 3 10.4 parts, BaCO 3 0~0.1 parts, CaCO 3 0.5 parts, La 2 o 3 1 part, Fe 2 o 3 88 parts, ZnO 0.1 part; the average particle size of each raw material in the main component is not greater than 5 μm, and the total weight of the main component is 2 kg;

[0056] The permanent ferrite material contains additives composed of the following components, the additives are composed of 0.6 parts by weight of calcium carbonate and 0.4 parts by weight of silicon dioxide.

[0057] A preparation method of a permanent magnet ferrite material, comprising the following steps:

[0058] a) Batching: batching is carried out according to the above-mentioned components and contents, and the main components are mixed to obtain a mixture;

[0059] b) primary ball milling: ball milling the mixture for 5 hours to obtain primary ball milling material, the milling speed is 70rpm; durin...

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Abstract

The invention belongs to the technical field of magnetic materials. The invention discloses a permanent magnetic ferrite material. The permanent magnetic ferrite material is prepared from the raw materials such as SrCO3, BaCO3, CaCO3, La2O3, Fe2O3 and ZnO, wherein at least one component of silicate, carbonate, aluminum oxide, bismuth oxide or silicon dioxide can also be added as an additive. The invention also discloses a preparation method of the permanent magnetic ferrite material. The preparation method comprises the following steps: preparing raw materials, performing the primary ball milling, pre-burning, performing the secondary ball milling, forming, sintering, and performing the after-treatment. The existing strontium ferrite is mixed with lanthanum oxide, calcium oxide and zinc oxide, so that an ion substitution effect can be achieved; and meanwhile, a preparation process is designed according to the characteristics of components, so that the magnetic performance of the Co-free permanent magnetic ferrite is improved, and the cost is decreased.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a permanent magnet ferrite material and a preparation method thereof. Background technique [0002] M-type permanent ferrite is a ferrimagnetic oxide with good magnetic properties and outstanding cost performance. It is widely used in home appliance motors, sensors, office equipment, automotive motors, medical equipment and other fields. [0003] In recent years, its main development direction is to introduce Ca element in the formula to replace all or part of the Sr position in the hexagonal M-type ferrite, and at the same time add some La and Co oxides in order to maintain the stability of the crystal structure and the balance of the electric price, and here Based on the ion replacement of other elements, stable hexagonal ferrite crystals, larger magnetocrystalline anisotropy constant K1 and higher material saturation magnetization Ms values ​​can be obtained, and at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26H01F1/10H01F41/02
CPCC04B35/2633C04B35/2641C04B2235/3217C04B2235/3284C04B2235/3418C04B2235/3427C04B2235/442C04B2235/72C04B2235/74H01F1/10H01F41/02
Inventor 吴云飞李军华杨武国胡江平
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD