Abstract
Studies were carried out to reduce the leakage current of high-voltage ZnO varistor ceramics by varying Sb2O3 and NiO content in a ZnO-Bi2O3-Sb2O3-Al2O3-Co3O4-NiO. It was found that the ceramic composition (wt %): ZnO 80, Bi2O3 5.83, Sb2O3 2.62, A12O3 4.66, Co2O3 3.80, NiO 3.09, has a minimum leakage current density Iout ≤ 0.1 μA cm-2, breakdown voltage Ub = 4.1kV mm-1, nonlinearity coefficient α = 65. The resulting ceramics are promising for the production of varistors with high stability of performance.
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Acknowledgments
We express our gratitude to O.A. Zalkind and T.I. Lobacheva, employees of the IHTREMS analytical service, for the quality of the spectral analysis and determination of the specific surface area of the samples.
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Russian Text © The Author(s), 2019, published in Zhurnal Prikladnoi Khimii, 2019, Vol. 92, No. 9, pp. 11503–1156.
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Gromov, O.G., Tikhomirova, E.L. & Savel’ev, Y.A. Dependence of Properties of High Voltage Zinc Oxide Varistor from Antimony and Nickel Oxides. Russ J Appl Chem 92, 1232–1238 (2019). https://doi.org/10.1134/S1070427219090076
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DOI: https://doi.org/10.1134/S1070427219090076