Effect of Simultaneous Addition of Zr and Y on Electrical Characteristics of ZnO Varistors

Abstract:

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The effect of simultaneously adding Zr and Y to Bi–Mn–Co–Sb–Si–Cr–Ni-added ZnO varistors (having the same composition as a commercial varistor) on the varistor voltage, leakage current, and resistance to electrical degradation were investigated. Varistor voltage increased with increasing amount of Y for addition of 0–2 mol % Zr. On the other hand, the nonlinear coefficient α prior to electrical degradation changed very little on the addition of both Y and Zr. With the addition of approximately 1 mol% Zr, the leakage current decreased with increasing amount of Y added. A ZnO varistor with a varistor voltage of approximately 600 V/m, a low leakage current, and excellent resistance to electrical degradation was fabricated by adding approximately 2 mol% Y and approximately 1 mol% Zr.

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Periodical:

Edited by:

Chazono Hirokazu, Fujihara Shinobu, Katayama Keiichi, Masumoto Hiroshi, Mizoguchi Teruyasu, Osada Minoru, Shinozaki Kazuo and Takeda Hiroaki

Pages:

257-260

DOI:

10.4028/www.scientific.net/KEM.485.257

Citation:

T. Watanabe et al., "Effect of Simultaneous Addition of Zr and Y on Electrical Characteristics of ZnO Varistors", Key Engineering Materials, Vol. 485, pp. 257-260, 2011

Online since:

July 2011

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Price:

$35.00

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