Process for preparing powder of an alloy of a rare earth element

Details Process for preparing powder of an alloy of a rare earth element Process for preparing powder of an alloy of a rare earth element

1989-07-05

1990-07-31

Morris, Theodore

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

75350, 148105, H01F 1053, H01F 109

Patent

active

049448013

ABSTRACT:
A powder of a rare earth oxide, or a powder of a rare earth oxide and a rare earth metal is mixed with a powder containing iron, a powder containing boron and at least one material selected from among an alkali metal, an alkaline earth metal and a hydrogenated product thereof. The mixture is heated at a temperature of 900.degree. C. to 1200.degree. C. in a non-oxidizing atmosphere, subjected to wet treatment, and heated again at a temperature of 650.degree. C. to 1100.degree. C., whereby an alloy powder is obtained. Alternatively, the mixture is heated at a temperature of 900.degree. C. to 1200.degree. C., crushed into coarse particles, heated again at a temperature of 650.degree. C. to 1100.degree. C. and subjected to wet treatment. The powder is pulverized into a finer powder having an average particle diameter of 1 to 10 microns. The powder is used for making a magnet with a resin.

REFERENCES:
patent: 4767450 (1988-08-01), Ishigaki et al.
patent: 4769063 (1988-09-01), Ishigaki et al.
patent: 4770702 (1988-09-01), Ishigaki et al.
patent: 4773950 (1988-09-01), Fujimura et al.

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