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Effect of the sintering temperature on the electrical properties of Y–Al‐doped ZnO varistors

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 t...

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Published in:International journal of ceramic engineering & science 2024-10
Main Authors: Wang, Lei, Zhang, Hang, Zhang, Kexin, Shen, Yubo, Qu, Limin, Yin, Yue, Meng, Pengfei, Guo, Jingke
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container_title International journal of ceramic engineering & science
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creator Wang, Lei
Zhang, Hang
Zhang, Kexin
Shen, Yubo
Qu, Limin
Yin, Yue
Meng, Pengfei
Guo, Jingke
description 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_str_mv 10.1002/ces2.10243
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title Effect of the sintering temperature on the electrical properties of Y–Al‐doped ZnO varistors
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