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

Mehdi Mirzayi; Mohammad Hoseen Hekmatshoar; Abdolazim Azimi

doi:10.4028/www.scientific.net/KEM.495.190

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The Role of Leadership in High Tech Manufacturing Companies in a Changing Environment
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Commensurability of the Structures of Boride Layers
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Effect of Sintering Temperature on Microstructure and Electrical Properties of Nanozinc Oxide Varistor
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 495Effect of Sintering Temperature on Microstructure...

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.

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Periodical:

Key Engineering Materials (Volume 495)

Pages:

190-193

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.495.190

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Online since:

November 2011

Authors:

Mehdi Mirzayi, Mohammad Hoseen Hekmatshoar, Abdolazim Azimi

Keywords:

Grain-Boundary Phenomenon, Non-Linear Behavior, Varistor, ZnO Nanoparticle

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