Compositions – Magnetic – Chromium or chromium compound containing
Patent
1989-03-22
1992-09-29
Cooper, Jack
Compositions
Magnetic
Chromium or chromium compound containing
252 6256, 423439, C01B 3130
Patent
active
051512068
ABSTRACT:
The present invention relates to novel acicular particles, processes for using the same, and magnetic materials prepared from such particles. In particular, the invention relates to an acicular particulate material containing iron carbide and having a high coercive force (Hc) an orientation property in a magnetic field.
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Beaulieu et al., "Canadian Metallurgical Quarterly", vol. 12, No. 3 (1973), pp. 265-270.
Herbstein et al., Identification of Eckstrom-Adcock Iron Carbide as Fe.sub.7 C.sub.3 Inorganic Chemistry, vol. 3, No. 6, pp. 895, 896, 1964, South Africa.
Senateur, Contribution a l'Etude Magnetique et Structurale du Carbure de Hagg, Ann. Chin., t.2, p. 103ff. 1967, France.
Cohn et al., Mode of Transition from Hagg Iron Carbide to Cementite, J.A.C.S. vol. 72, pp. 4662-4664, 1950.
Aomi Hideki
Daimon Shiego
Kitamura Ikuo
Koyama Satoshi
Okamura Kazuo
Cooper Jack
Daikin Industries Ltd.
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