Coated metal powder, powder magnetic core and method for producing same

A manufacturing method and technology of metal powder, which are applied in the field of coated metal powder, powder magnetic core and their manufacturing, can solve the problems of inability to obtain functional effects, and achieve the effect of excellent mechanical properties

Inactive Publication Date: 2013-02-06
RESONAC CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the coated metal powder using pure iron powder cannot obtain the above-mentioned effects as when Fe-Si powder is used.

Method used

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  • Coated metal powder, powder magnetic core and method for producing same
  • Coated metal powder, powder magnetic core and method for producing same
  • Coated metal powder, powder magnetic core and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0125] Put 30g of pure iron powder (water atomized powder, KIP-304AS manufactured by Kawasaki Iron and Steel Co., Ltd.) into a 50ml cylindrical container made of polypropylene, and add 3.4ml (0.358M) of calcium nitrate aqueous solution and 10ml of pure water to it. , 0.5ml 25% ammonia water, 3.4ml (0.215M) ammonium dihydrogen phosphate aqueous solution. Cap immediately after addition and stir with a mixing rotor set at 40 rpm. After 2 hours, the container was opened, and 2.0 g of ultra-high-purity colloidal silica (manufactured by Fuso Chemical Industry Co., Ltd. "Quartron PL-1", particle size 40 nm, SiO 2 Concentration is 12 mass %), cover again, and stir for 1.0 hour with the mixing rotor whose rotation number is set to 40 rpm.

[0126] The stirred iron powder dispersion was suction-filtered using No. 5C filter paper for quantitative analysis, and the filtrate was washed with acetone. The obtained iron powder was dried in a vacuum dryer to obtain a silicon dioxide / hydroxya...

Embodiment 2）

[0156] Put 30g of pure iron powder into a 50ml cylindrical container made of polypropylene, and add 3.4ml (0.358M) calcium nitrate aqueous solution, 10ml pure water, 0.5ml 25% ammonia water, 3.4ml (0.215M) diphosphate Aqueous solution of ammonium hydrogen. Cap immediately after addition and stir with a mixing rotor set at 40 rpm. After 2 hours, the container was opened, and 1.0 g of ultra-high-purity colloidal silica (manufactured by Fuso Chemical Industry Co., Ltd. "Quartron PL-7", particle size 120 nm, SiO 2 Concentration is 23% by mass), covered again, and stirred for 1.0 hour with a mixing rotor whose rotation number was set at 40 rpm.

[0157] The stirred iron powder dispersion was suction-filtered using No. 5C filter paper for quantitative analysis, and the filtrate was washed with acetone. The resulting iron powder was dried in a vacuum desiccator to obtain SiO 2 / HAP coated iron powder.

[0158] Next, 30g of the above SiO 2 / HAP-coated iron powder was placed in a...

Embodiment 3）

[0165] In Example 2, the SiO 2 Change to alumina (Al 2 o 3 , manufactured by Nissan Chemical Industry Co., Ltd., alumina sol 100, Al 2 o 3 concentration is 10% by mass). The input amount of each material to the iron powder and the coating method are all the same as in Example 2.

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Abstract

A coated metal powder is a metal powder that contains iron as a main component, and an insulating layer that is formed on a surface of the metal powder and is formed from calcium phosphate and a metal oxide, in which an organosilicon compound is contained on a surface of the insulating layer or inside the insulating layer.

Description

technical field [0001] The invention relates to a coated metal powder, powder magnetic core and their manufacturing method. Background technique [0002] There are many products that use electromagnetics around us, including transformers, motors, generators, speakers, induction heaters, and various drives. Most of these products utilize an alternating magnetic field, which is generally generated by a coil with a magnetic core disposed in the center. Therefore, the performance of the electromagnetic device is governed by the performance of the coil, which is governed by the performance of the aforementioned magnetic core. Therefore, it is very important to improve the performance of the magnetic core in order to realize the performance improvement and miniaturization of the electromagnetic equipment. [0003] Among such magnetic cores, the ferrite core has a disadvantage that the saturation magnetic flux density is small. On the other hand, powder cores manufactured by mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F1/00B22F3/00H01F1/24H01F1/33H01F3/08H01F27/255H01F41/02B22F1/102
CPCH01F1/24B22F1/0062H01F1/26B22F1/02C22C2202/02H01F41/0246H01F3/08H01F1/33Y10T428/2995B22F1/102
Inventor 下山雄大丸山钢志
Owner RESONAC CORPORATION
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