Method for forming a heat-resistant insulating film on a grain o

Details Method for forming a heat-resistant insulating film on a grain o Method for forming a heat-resistant insulating film on a grain o

1977-01-18

1978-09-12

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 131, 148 27, 148 315, 148 3155, 148122, 427126, 427127, H01F 104

Patent

active

041135300

ABSTRACT:
A uniform and high adhesive heat-resistant insulating film can be formed on a silicon steel sheet by applying an annealing separator consisting mainly of magnesia and containing 1-10% of titanium oxide having such a particle size that at least 99.5% of the agglomerated particles passes through 325-mesh sieve and having a dispersion degree in water of at least 85%.

REFERENCES:
patent: 3627594 (1971-12-01), Yamamoto et al.
patent: 3653984 (1972-04-01), Urushiyama et al.
patent: 3676227 (1972-07-01), Matsumoto et al.
patent: 3819427 (1974-06-01), Baesch
patent: 3956029 (1976-05-01), Yamamoto et al.

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