Abstract
A series of zinc oxide based varistors containing 0.5 wt% Bi2O3 and 0.5 wt% Mn2O3 was prepared by a conventional mixed oxide route and sintered at temperatures between 950° and 1300°C. All samples showed varistor behaviour, although as the sintering temperature was increased from 950°C to 1300°C, the non-linearity coefficient, α, decreased from 22 to 3.
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