Method for manufacturing zinc oxide varistors having reduced vol

Details Method for manufacturing zinc oxide varistors having reduced vol Method for manufacturing zinc oxide varistors having reduced vol

1978-12-07

1981-01-06

Parrish, John

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264345, C04B 3330

Patent

active

042436222

ABSTRACT:
Zinc oxide varistors are thermally treated, after sintering, at temperatures between 400.degree. C. and 800.degree. C. in air for a period of one to ten hours. The thermal treatment apparently removes residual strains resulting from the sintering process and substantially reduces voltage drift.

REFERENCES:
patent: 4046847 (1977-09-01), Kresge
patent: 4165351 (1979-08-01), May

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