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Abstract The effects of CaO (Ca) doping on the microstructure and comprehensive electrical properties of ZnO varistor ceramics were studied. A small amount of Ca doping could increase the voltage… Click to show full abstract
Abstract The effects of CaO (Ca) doping on the microstructure and comprehensive electrical properties of ZnO varistor ceramics were studied. A small amount of Ca doping could increase the voltage gradient and nonlinearity of ZnO varistor ceramics and reduce the leakage current. The low-cost Ca could be an excellent substitute for some expensive doping elements of ZnO varistor ceramics. The electrical parameters of the best sample were as follows: breakdown voltage E1mA= 532 V / mm, leakage current JL = 0.11 μ A / cm2 and non-linear coefficient α = 96.
Journal Title: Materials Letters
Year Published: 2020
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