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http://dx.doi.org/10.4313/JKEM.2005.18.12.1117

Fabrication and Electrical Characteristics of ZnO Nano-powder Varistors  

Yoo, In-Sung (원광대학교 전기전자 및 정보공학부)
Jeong, Jong-Yub (원광대학교 전기전자 및 정보공학부)
Park, Choon-Bae (원광대학교 전기전자 및 정보공학부)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.18, no.12, 2005 , pp. 1117-1123 More about this Journal
Abstract
In this study, our varistors based on M. Matsuoka's composition were fabricated with ZnO nano-powder whose sizes were 50 nm and 100 nm. Before fabrication of ZnO nano-powder varistors, structure and Phase were analyzed by FE-SEM and XRD with size of ZnO nano-powders to obtain manufacturing information to fabricate the first ZnO varistors using by nano-powders. As a results of these analyses, calcination and sintering temperatures were respectively designed at $600^{\circ}C\;and\;1050^{\circ}C$. ZnO nano-powder varistors were analyzed by SEM and XRD to measure the changes of microstructures and phase after sintered by out process conditions. Also, electrical properties of ZnO nano-powder varistors were obtained by capacitance-voltage, frequency-teal impedance, and current-voltage corves. Our ZnO nano-powder varistors had about 2.5 times of electric field at varistor voltage as compared with normal ZnO varistors fabricated with micro-powder. Also, leakage current and non-liner coefficient respectively had $2.0{\times}10^{-6}A/cm^{-2}$ and 41 for ZnO nano-powder varistors with 50 nm.
Keywords
ZnO; Nano-powder; Sintering; Non-linear coefficient;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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