FIELD: chemistry.
SUBSTANCE: zinc-oxide varistor ceramics contains oxides of zinc, bismuth, antimony, aluminium, cobalt and nickel in quantitative ratio, wt %: ZnO 60.0-85.0, Bi2O3 3.42-9.11, Sb2O3 4.79-12.76, Al2O3 3.18-8.47, Co2O3 2.53-6.74, NiO 1.08-2.92. Oxides of bismuth, antimony, aluminium cobalt and nickel relate as 1.0:1.4:0.93:0.74:0.32. Obtained varistor ceramics has break-down voltage 3.5-4.4 kV/mm and coefficient of non-linearity 40-55.
EFFECT: possibility of ceramics application for production of high-voltage varistors.
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