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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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

Received: 05 May 2021

PACS:

TB321

Fund:国家自然科学基金资助项目（51762038）

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	Cheng Kuan
	Zhao Hongfeng
	Zhou Yuanxiang

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Cheng Kuan,Zhao Hongfeng,Zhou Yuanxiang. Effect of B₂O₃ Doping on the Aging Characteristics of DC ZnO Varistor Ceramics[J]. Transactions of China Electrotechnical Society, 2022, 37(13): 3413-3421.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210626 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I13/3413

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