Arc resistant insulator

Details Arc resistant insulator Arc resistant insulator

1982-05-14

1983-10-25

Poer, James

Compositions: ceramic

Ceramic compositions

Aluminum compound containing

106DIG3, C04B 3510

Patent

active

044120109

ABSTRACT:
An arc resistant insulator composed of a composite composition comprising an insulating base material and a zinc borate hydrate. The insulating base material is composed of aluminum oxide and/or aluminum hydroxide and mica power. The zinc borate hydrate is composed essentially of 2ZnO.3B.sub.2 O.sub.3.3H.sub.2 O. The arc resistant insulator is prepared by mixing the insulating base material with a zinc borate hydrate forming material composed of normal boric acid, boric acid anhydride and zinc oxide and heating and compacting the mixture thus obtained in a closed system at a temperature of at least 155.degree. C. under pressure of at least 50 kg/cm.sup.2.

REFERENCES:
patent: 3310411 (1967-03-01), Vedder et al.
patent: 3827892 (1974-08-01), McCauley
Y. Utsumi et al, "Reaction Mechanism of H.sub.3 BO.sub.3 -ZnO Bonding Material Under Hot-Pressing and Heat Treatment," Journal of the American Ceramic Society, vol. 64, No. 11, Nov. 1981.

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