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Ferrite magnetic material and manufacturing method thereof

A manufacturing method and technology of ferrite magnets, which are applied in the manufacture of inductors/transformers/magnets, magnetic objects, and inorganic material magnetism, etc., can solve the problems of expensive rare earth materials, declining market competitiveness, and rising production costs, and achieve production Low cost, improved magnetic properties, and the effect of increasing the amount of solid solution

Active Publication Date: 2012-05-02
HUNAN AEROSPACE MAGNET & MAGNETO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of rare earth elements such as La in ferrite magnetic materials obtained by this technology is relatively high, but rare earth materials are expensive, so the production cost of ferrite magnetic materials obtained by this technology has risen sharply, and the market competitiveness has declined

Method used

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  • Ferrite magnetic material and manufacturing method thereof
  • Ferrite magnetic material and manufacturing method thereof
  • Ferrite magnetic material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to Embodiment 5

[0011] The traditional SrO·nFe2O3 permanent magnet ferrite powder is produced by using the known permanent magnet ferrite calcined material manufacturing process, wherein n=5.95, and the average particle size of the powder is 3~5μm.

[0012] Weigh 5000 grams of the above-mentioned permanent magnet ferrite powder, divide it into 5 parts, each part is 1000 grams, and use it as the main raw material of Embodiment 1 to Embodiment 5. All add the batching of following weight in every part of permanent magnet ferrite powder: take the weight of 1000 grams of permanent magnet ferrite powder as a basis, respectively claim the calcium carbonate 1% (10 grams) of the weight ratio of permanent magnet ferrite powder ), silicon dioxide 0.3% (3 grams), boric acid 0.3% (3 grams), SrCO 3 1.0% (10g), La 2 o 3 0.03% (0.3 grams), in addition the Co added in embodiment 1 to embodiment 5 2 o 3 The weights are 0.1% (1 gram), 0.2% (2 grams), 0.4% (4 grams), 1.0% (10 grams), 1.55% (15.5 grams). ...

Embodiment 6 to Embodiment 8

[0020] Using the known manufacturing process of permanent magnet ferrite calcined material, the traditional SrO nFe is manufactured 2 o 3 Type permanent magnet ferrite powder, where n=5.95, and the average particle size of the powder is 3~5μm.

[0021] Weigh 3000 grams of the above-mentioned permanent magnet ferrite powder, divide it into 3 parts, each part is 1000 grams, and use it as the main raw material of Embodiment 6 to Embodiment 8. All add the batching of following weight in every part of permanent magnet ferrite powder: take the weight of 1000 grams of permanent magnet ferrite powder as a basis, respectively claim the calcium carbonate 1% (10 grams) of the weight ratio of permanent magnet ferrite powder ) silicon dioxide 0.25% (2.5 grams), boric acid 0.35% (3.5 grams), SrCO3 1.0% (10 grams), Co2O3 0.4% (4 grams), in addition in embodiment 6 to the weight of La2O3 added in embodiment 8 Respectively 0.016% (0.16 grams), 0.035% (0.35 grams), 0.06% (0.6 grams).

[0022...

Embodiment 9 to Embodiment 12

[0029] Using the known manufacturing process of permanent magnet ferrite calcined material, the traditional SrO nFe is manufactured 2 o 3 Type permanent magnet ferrite powder, where n=5.95, and the average particle size of the powder is 3~5μm.

[0030]Weigh 4000 grams of the above-mentioned permanent magnet ferrite powder, divide it into 4 parts, each part is 1000 grams, and use it as the main raw material of Examples 9 to 12. All add the batching of following weight in every part of permanent magnet ferrite powder: take the weight of 1000 grams of permanent magnet ferrite powder as a basis, respectively claim the calcium carbonate 1% (10 grams) of the weight ratio of permanent magnet ferrite powder ) silicon dioxide 0.3% (3 grams), boric acid 0.3% (3 grams), La 2 o 3 0.03% (0.3 g), Co 2 o 3 0.4% (1 gram), additional SrCO added in Example 9 to Example 12 3 The weights are 0.15% (1.5 grams), 0.5% (5 grams), 1% (10 grams), 1.5% (15 grams).

[0031] According to La 2 o...

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Abstract

The invention discloses a ferrite magnetic material and a manufacturing method thereof. In the ferrite magnetic material, a composition shown by a combined formula of A1-xLax(Fe12-yCoy)zO1+18Z is used as a main component; in the formula, A is at least one element selected from Sr, Ba and Ca; x is 0.001-0.039; y is 0.01-0.2; and z is 0.80-0.89. According to the invention, by adding strontium carbonate and trace La element into a ball milling process, solid solubility of Co element in the ferrite can be improved, the magnetic performance of the ferrite can be greatly improved, and the production cost is low; and through the material and the method, permanent magnetic ferrite with Br greater than or equal to 4,100 G and Hcj greater than or equal to 4,000 Oe can be obtained.

Description

technical field [0001] The invention relates to a ferrite magnetic material and a manufacturing method thereof. Background technique [0002] CN200510118623.X discloses a ferrite magnetic material, with composition formula A 1-x (La 1-m R m ) x (Fe 12-y co y ) z o 19 The indicated composition is the main component, wherein A is at least one element selected from among Sr, Ba and Pb, R is Pr and / or Nd, wherein 0.04≤x<0.80, 0.02≤y≤0.20, 0.00< m<0.90, 0.90<z<1.1, 1.3≤x / yz<2.5, the Br of the obtained ferrite sintered magnet is above 4000G, and the coercive force Hcj is above 4000Oe. It can thus be concluded that the proportional coefficient (1-m)x of the La element in the patent is between 0.004 and 0.8. The content of rare earth elements such as La in the ferrite magnetic material obtained by this technology is relatively high, but the rare earth material is expensive, so the production cost of the ferrite magnetic material obtained by this technology...

Claims

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Application Information

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IPC IPC(8): H01F7/00H01F1/10H01F41/02C04B35/622
Inventor 詹枞生郑亮张铁军胡盛青邱捧祥
Owner HUNAN AEROSPACE MAGNET & MAGNETO
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