Effect of Y2O3 and CeO2 co-doping on microstructure and electrical properties of ZnO-Bi2O3-based varistors
Source abstract
Abstract
ZnO-Bi 2 O 3 -based varistors co-doped with Y 2 O 3 and CeO 2 were prepared by the solid-phase sintering method. The phase composition, microstructure, and elemental distribution of ZnO varistors were characterized by XRD , FE-SEM, and EDS. The relationship between microstructure and electrical properties of ZnO varistors is analyzed. The experimental results show that Y 2 O 3 and CeO 2 improve the voltage gradient and nonlinear coefficient through synergistic interaction. At the doped ratios of 0.20 mol% Y 2 O 3 and 0.08 mol% CeO 2 , the best comprehensive electrical properties of ZnO varistors can be obtained with voltage gradient E 1 mA = 319 V/mm, leakage current density J L = 0.67 μA·cm −2 , nonlinear coefficient α = 36, residual voltage ratio K = 1.79, and aging coefficient K ct = 0.860.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: ZnO doping and properties · Multiferroics and related materials · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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