Paper Title:
Effect of Sintering Temperature on Microstructure and Electrical Properties of Nanozinc Oxide Varistor
  Abstract

Nanometer-sized ZnO powder was synthesized at low decomposing temperature by polyacrylamide-gel method where Acrylamide was used as monomer, and N,N-methylene-bisacrylamide as lattice reagent. The characteristic of powders were studied by X-ray diffraction and scanning electron microscope (SEM). The results indicated uniform distribution of nanoZnO particles. Also electrical properties were investigated at different sintering temperatures of 800, 900 and 1000 ° C. It was observed that increase in sintering temperature, resulted in increase in the grain size of the varistor ceramics. The observed nonlinearity in current – voltage characteristic was explained by the existence of potential barrier at the grain boundaries and lowering of the barriers.

  Info
Periodical
Edited by
E. Hristoforou and D.S. Vlachos
Pages
190-193
DOI
10.4028/www.scientific.net/KEM.495.190
Citation
M. Mirzayi, M. H. Hekmatshoar, A. Azimi, "Effect of Sintering Temperature on Microstructure and Electrical Properties of Nanozinc Oxide Varistor", Key Engineering Materials, Vol. 495, pp. 190-193, 2012
Online since
November 2011
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$32.00
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