Effect of Sintering Temperature on Microstructure and Electrical Properties of Nanozinc Oxide Varistor

Abstract:

Article Preview

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 et al., "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

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.