Effect of the sintering temperature on the electrical properties of Y–Al‐doped ZnO varistors
Year: 2024
Type: article
Abstract: To investigate the relationship between the electrical properties of Y–Al doped ZnO varistors and sintering temperature, in this study, we measured the voltage–current characteristics and electrical performance parameters of samples sintered at –. Scanning electron microscopy observations revealed that as the sintering temperature increased, the grain size grew significantly, leading to a reduction in voltage gradient. Through characteristic testing, X‐ray diffraction and energy dispersive X‐ray spectroscopy analysis, it was found that the increase in sintering temperature promoted the formation of interface negative charge and defect reactions by , increasing and ; tends to aggregate in the grain area, further increasing ; the volatilization of gradually increases, causing a decrease in ; the first increases and then decreases with the changes in and , resulting in a U‐shaped variation characteristic of the nonlinear coefficient and leakage current density. At a sintering temperature of , the performance of ZnO varistors is optimal.
DOI: 10.1002/ces2.10243
Authors: Lei Wang, Hang Zhang, Kexin Zhang, Yubo Shen, Limin Qu, Yue Yin, Pengfei Meng, Jingke Guo
Institutions: State Grid Corporation of China (China), Sichuan University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,080
OpenAlex ID: W4403956148