Method for preparing non-magnetic nickel powders

Details Method for preparing non-magnetic nickel powders Method for preparing non-magnetic nickel powders

2007-05-01

2007-05-01

Wyszomierski, George (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

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

C075S374000

Reexamination Certificate

active

10854273

ABSTRACT:
Provided is a method for preparing non-magnetic nickel powders. The method include (a) heating a mixture including a nickel precursor compound and a polyol to reduce the nickel precursor compound to nickel powders with a face-centered cubic (FCC) crystal structure, and (b) heating the resultant mixture of step (a) to transform at least a portion of the nickel powders with the FCC crystal structure to nickel powders with a hexagonal close packed (HCP) crystal structure.

REFERENCES:
patent: 5759230 (1998-06-01), Chow et al.
patent: 6974492 (2005-12-01), Harutyunyan et al.
patent: 2006/0090601 (2006-05-01), Goia et al.
patent: 2002-094069 (2002-12-01), None
D.A. Papaconstantopoulos et al., “Ferromagnetism in Hexagonal-Close-Packed Elements”, Physical Review B, Feb. 1, 1989, vol. 39 No. 4, pp. 2526-2528.

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