Calcined member for arc-extinguishing chambers

Details Calcined member for arc-extinguishing chambers Calcined member for arc-extinguishing chambers

1982-07-15

1984-03-13

Bell, Mark

Compositions: ceramic

Ceramic compositions

Refractory

106DIG3, 200144C, 200149A, 501112, C04B 3504, C04B 3518

Patent

active

044368313

ABSTRACT:
A calcined member for arc-extinguishing chambers which are installed in electromagnetic contactors and magnetic circuit breakers for high-voltage applications. The calcined member consists of an inorganic composite material obtained by molding and heat-treating a starting material under pressurized condition, the starting material comprising 10 to 50% by weight of a mica powder as a base material, 10 to 50% by weight of a magnesium oxide as a charging material, and 25 to 60% by weight of a mixture powder of boric acid, boric anhydride and zinc oxide as a binder.

REFERENCES:
patent: 2768264 (1956-10-01), Jones et al.
patent: 2864919 (1958-12-01), Stringfellow
patent: 2950371 (1960-08-01), Stringfellow

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