Preparation of acicular ferromagnetic metal particles of substan

Details Preparation of acicular ferromagnetic metal particles of substan Preparation of acicular ferromagnetic metal particles of substan

1987-02-05

1990-06-12

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

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

148105, B22F 924

Patent

active

049330047

ABSTRACT:
Ferromagnetic metal particles of substantially iron are prepared by starting from an acicular .alpha.-FeOOH, applying a shape-stabilizing finish to the particle surface, heating at 500.degree.-850.degree. C. and subsequently reducing with gaseous reducing agents at 200.degree.-500.degree. C. to the metal, and starting .alpha.-FeOOH being prepared in the presence of zinc and phosphate ions.

REFERENCES:
patent: 2694656 (1954-11-01), Camras
patent: 2879154 (1959-03-01), Campbell
patent: 3082067 (1963-03-01), Hund
patent: 3607220 (1971-09-01), vander Giessen
patent: 3702270 (1972-11-01), Kawasaki et al.
patent: 3931025 (1976-01-01), Woditsch et al.
patent: 4050962 (1977-09-01), Koester et al.
patent: 4122216 (1978-10-01), Okazoe
patent: 4133677 (1979-01-01), Matsui et al.
patent: 4165232 (1979-08-01), Jaeckh et al.
patent: 4209412 (1980-06-01), Marcot
patent: 4258879 (1981-03-01), Nischwitz
patent: 4290799 (1981-09-01), Schroeder et al.
patent: 4305753 (1981-12-01), French
patent: 4309459 (1982-01-01), Tokuoka
patent: 4344791 (1982-08-01), Steck et al.

Affiliated with

Also associated with

Rating

Preparation of acicular ferromagnetic metal particles of substan does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of acicular ferromagnetic metal particles of substan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of acicular ferromagnetic metal particles of substan will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-615080