Process for producing ferromagnetic metal fine particles

Details Process for producing ferromagnetic metal fine particles Process for producing ferromagnetic metal fine particles

1987-10-09

1989-02-14

Lusignan, Michael

Coating processes

Magnetic base or coating

Magnetic coating

252 6255, 427131, 427215, B05D 512, B05D 700, B22F 300, C04B 3564

Patent

active

048045616

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.

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