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http://dx.doi.org/10.3740/MRSK.2006.16.7.416

Varistor Properties of ZPCCL-based Ceramics  

Nahm, Choon-Woo (Department of Electrical Engineering, Dongeui University)
Publication Information
Korean Journal of Materials Research / v.16, no.7, 2006 , pp. 416-421 More about this Journal
Abstract
The varistor properties of ZPCCL-based ceramics were investigated at different $La_2O_3$ contents in the range of $0{\sim}2.0$ mol%. As $La_2O_3$ content increased, the ceramic density greatly increased in the range of $4.71{\sim}5.77\;g/cm^3$ and the varistor voltage greatly decreased in the range of $503.5{\sim}9.4$ V. The varistor with 0.5 mol% $La_2O_3$ exhibited good nonlinearity, in which the nonlinear exponent is 81.6 and the leakage current is 0.2 ${\mu}A$. Furthermore, the varistors exhibited the high electrical stability, with $%{\Delta}V_{1mA}=-1.1%,%{\Delta}{\alpha}=-3.7%$, and $%{\Delta}I_L=+100%$ for DC accelerated aging stress condition of 0.95 $V_{1mA}/150^{\circ}C/24$ h.
Keywords
$La_2O_3$; Stability; DC accelerated aging stress; ZPCCL-based ceramics;
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