Annealing separator for grain oriented silicon steel strips

Details Annealing separator for grain oriented silicon steel strips Annealing separator for grain oriented silicon steel strips

1979-11-27

1981-09-01

Roy, Upendra

Metal treatment

Compositions

Heat treating

148113, 106 58, 106 62, C04B 3504, B23K 3524

Patent

active

042870062

ABSTRACT:
An annealing separator useful for producing a grain oriented silicon steel strip having an excellent magnetic property, comprises non-hydrating magnesium oxide which has been calcined at a temperature of 1300.degree. C. or more, preferably, from 1300.degree. to 2100.degree. C., and which is in the form of fine particles, 70% by weight of which have a size of 5 microns or less, and optionally, magnesium hydroxide in an amount of 1 to 100% based on the weight of the magnesium oxide and/or an aluminium compound in an amount of 0.05 to 10% based on the weight of the magnesium oxide.

REFERENCES:
patent: 3583887 (1971-06-01), Steger et al.
patent: 3697322 (1972-10-01), Lee et al.
patent: 3768990 (1973-10-01), Sellers et al.
patent: 3956029 (1976-05-01), Yamamoto et al.
patent: 4033778 (1977-07-01), Gildin et al.
patent: 4073662 (1978-02-01), Borom
patent: 4096000 (1978-06-01), Wada et al.
patent: 4126479 (1978-11-01), Videtto
patent: 4140534 (1979-02-01), Brodmann et al.

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