不同形貌Co<sub>3</sub>O<sub>4</sub>对氧化锌压敏电阻器电性能的影响

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Abstract In order to improve that electrical properties of zinc oxide varistor, this paper conducts a series of tests to study the influence of needle-like and spherical Co₃O₄ on the varistor. Co, as a modified element, plays an important role in the electrical properties of varistor. The Co used in this paper is prepared by chemical co-precipitation method. Needle-like Co₃O₄ is prepared from 99.7% oxalic acid solution and analytically pure Co(NO₃)₂. Spherical Co₃O₄ is prepared from food-grade ammonium bicarbonate analytically pure Co(NO₃)₂. It is found that the varistor doped with needle-like Co₃O₄ is superior to the varistor doped with spherical Co₃O₄ in terms of 8/20μs wave current capacity and power frequency overvoltage withstand performance.

Key words： zinc oxide varistor morphology chemical co-precipitation method flow capacity energy tolerance power frequency overvoltage withstand test

Received: 25 March 2024

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	MA Xueli
	HE Xin

Cite this article:

MA Xueli,HE Xin. Study on the influence of different morphology of Co₃O₄ on the electrical properties of varistor[J]. Electrical Engineering, 2024, 25(9): 42-45.

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http://dqjs.cesmedia.cn/EN/Y2024/V25/I9/42

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