US 8,617,290 B2 · Method for manufacturing Fe—Si alloy powders

Abstract

The present invention relates to a method for manufacturing a Fe—Si alloy powder. A method for manufacturing a Fe—Si alloy powder includes: providing a mixture of an Al2O3 powder, an active agent powder, a Si powder, and a Fe powder; heating the mixture with a temperature of 700° C. to 1200° C. in the hydrogen atomosphere; magnetically separating a Fe-containing material from the mixture; and separating a Fe—Si alloy powder by soaking the Fe-containing material in an alkali solution. In the heating of the mixture, the Si powder is deposited on the surface of the Fe powder and diffused into the Fe powder.

Claims11

Dependent claims

A method for manufacturing a Fe—Si alloy powder, comprising:

providing a mixture of an Al2O3 powder, an active agent powder, a Si powder, and a Fe powder;
heating the mixture with a temperature of 700° C. to 1200° C. in a hydrogen atmosphere;
magnetically separating a Fe-containing material from the mixture;
and
separating a Fe—Si alloy powder by soaking the Fe-containing material in an alkali solution,
wherein in the heating of the mixture, the Si powder is deposited on the surface of the Fe powder and diffused into the Fe powder and
wherein the active agent powder includes at least one of compounds selected from a group consisting of an alkali metal fluoride, an alkaline earth metal fluoride, NH4F, AlF3, and CuF2, and the amount of the active agent powder in the mixture is 0.1 wt % to 5.0 wt %.

4 more elements

Dependencies are inferred from the claim text.

Method for manufacturing Fe—Si alloy powders

Life of this patent

Method for manufacturing Fe—Si alloy powders

Life of this patent

Abstract

Claims11