Composite insulating coatings for powders, especially for magnet

Details Composite insulating coatings for powders, especially for magnet Composite insulating coatings for powders, especially for magnet

1996-07-26

1998-08-25

Truong, Duc

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528502, 528503, 427212, 42721335, 42721336, C08F 600

Patent

active

057984395

ABSTRACT:
A method for producing composite insulating coatings on powder particles, the coatings containing an electrically insulating metal compound and an organic polymer. The coatings are deposited preferably by controlled spraying, simultaneous or sequential, of sol precursors of insulating metal compounds and polymer emulsions or solutions onto polymer, metal or ceramic powder particles preferably during the blending or mixing of the particles. The process is useful for mass production of coated iron-based powders used for shaping components by powder metallurgy techniques for magnetic applications. Coated iron based powders can be cold or warm pressed and heat treated to obtain the desired mechanical properties.

REFERENCES:
patent: 4601765 (1986-07-01), Soileau et al.
patent: 5063011 (1991-11-01), Rutz et al.
patent: 5211896 (1993-05-01), Ward
patent: 5352522 (1994-10-01), Kugimiya
F. Kloucek et al; Journal de Physique, Coll. C6, Suppl. to No. 9, vol. 46, Sep. 1985.

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