Method for manufacturing zinc oxide varistors having reduced voltage drift

Method for manufacturing zinc oxide varistors having reduced voltage drift

Zinc oxide varistors are thermally treated, after sintering, at temperatures between 400 DEG C. and 800 DEG 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.

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Bibliographische Detailangaben
Hauptverfasser: KRESGE, JAMES S
Format: Patent
Sprache:eng
Schlagworte:
ARTIFICIAL STONE
BASIC ELECTRIC ELEMENTS
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
ELECTRICITY
LIME, MAGNESIA
METALLURGY
REFRACTORIES
RESISTORS
SLAG
TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:Zinc oxide varistors are thermally treated, after sintering, at temperatures between 400 DEG C. and 800 DEG 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.