DC Aging Mechanism of Co2O3-Doped ZnO Varistors

• Published in: Energies (Basel) Vol. 14; no. 13; p. 4011
• Main Authors: Zhao, Xia, Shen, Haibin, Guo, Men, He, Ziming, Li, Yupeng, Wen, Ran
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.07.2021
• Subjects: Aging; Bismuth oxides; Bismuth trioxide; Cobalt oxides; Crystal defects; DC aging; Dielectric properties; Dielectric relaxation; double Schottky barrier; Electric fields; Electric power loss; Grain boundaries; Leakage current; Oxygen ions; Parameters; Point defects; Polyvinyl alcohol; Raw materials; Spectrum analysis; Zinc oxide; ZnO varistors

Lowered power loss and asymmetrically electrical parameters are reported in the DC aging of Co2O3-doped ZnO varistors in this paper. Based on the frequency domain dielectric responses of the pristine and degraded samples, the present study explores the roles of point defects in the aging process via...