B<sub>2</sub>O<sub>3</sub>掺杂对直流ZnO压敏电阻老化特性的影响

doi:10.19595/j.cnki.1000-6753.tces.210626

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摘要 ZnO压敏电阻是避雷器的核心部件,其性能的好坏直接影响着避雷器的电气性能。因此,该文致力于通过B₂O₃的掺杂以改善直流ZnO压敏电阻的非线性和高荷电率下的老化稳定性,并利用扫描电子显微镜（SEM）、X射线衍射（XRD）和电容-电压（C-V）等特性测试研究B₂O₃掺杂对直流ZnO压敏电阻的微观结构和电气特性的影响。然后,在115℃、0.95E_1mA的条件下对直流ZnO压敏电阻进行1 000h的直流加速老化试验,以验证其在高荷电率下的老化稳定性。试验结果表明,B₂O₃的掺杂提高了晶界层的势垒高度,改善了直流ZnO压敏电阻的非线性特性,并降低了其在高荷电率下的老化系数。

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	程宽
	赵洪峰
	周远翔

关键词 ：荷电率, 非线性, 势垒高度, 老化系数

Abstract：ZnO varistor is the core component of the arrester, and its performance can directly improve the electrical characteristics of the arrester. Therefore, this article is devoted to improving the non-linearity of DC ZnO varistor and the aging stability under high charge rate through the doping of B₂O₃. The effects of B₂O₃ doping concentration on the microstructure and electrical properties of ZnO varistors were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD) and capacitance-voltage (C-V). Then, the DC accelerated aging test of ZnO varistors was carried out at 115℃ and 0.95 E_1mAfor 1000 h. The results show that the doping of B₂O₃ increases the barrier height of the grain boundary layer, improves the nonlinear characteristics of ZnO varistors, and reduces its aging coefficient at high charge rate. The research results are of great significance for prolonging the service life of arrester and improving the safe and reliable operation of power system.

Key words： Charge rate nonlinearity barrier height aging coefficient

收稿日期: 2021-05-05

PACS:

TB321

通讯作者: 赵洪峰男,1978年生,副教授,硕士生导师,研究方向为高电压绝缘材料。E-mail：zhf_zhf@126.com

作者简介: 程宽男,1991年生,博士,研究方向为高电压绝缘材料。E-mail：2058693384@qq.com

引用本文:

程宽, 赵洪峰, 周远翔. B₂O₃掺杂对直流ZnO压敏电阻老化特性的影响[J]. 电工技术学报, 2022, 37(13): 3413-3421. Cheng Kuan, Zhao Hongfeng, Zhou Yuanxiang. Effect of B₂O₃ Doping on the Aging Characteristics of DC ZnO Varistor Ceramics. Transactions of China Electrotechnical Society, 2022, 37(13): 3413-3421.

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