The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1989
Filed:
Oct. 09, 1987
Chisso Corporation, , JP;
Abstract
A process for producing ferromagnetic metal fine particles having superior magnetic characteristics, particularly, high saturation magnetization, well-balanced coercive force, having prevented sintering of particles between one another and also having superior dispersibility each particle, superior dispersibility of magnetic paints and improved corrosion resistance is provided, which process comprises adhering a compound of a metal such as Ni, etc. onto the surface of iron .alpha.-oxyhydroxide particles in water, depositing a silicon compound and an aluminum compound onto the resulting particles in alkaline water, filtering off and drying the resulting iron .alpha.-oxyhydroxide, calcining the particles in a non-reducing gas atmosphere and reducing the particles on heating.