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Composition Dependence of The Electrical Conductivity of n-p Ceramic Composite

Published online by Cambridge University Press:  15 February 2011

Seok-Taek Jun  and
Gyeong-Man Choi
Seok-Taek Jun
Affiliation:
Pohang University of Science & Technology, Department of Materials Science & Engineering, Pohang, 790-784, SOUTH KOREA
Gyeong-Man Choi
Affiliation:
Pohang University of Science & Technology, Department of Materials Science & Engineering, Pohang, 790-784, SOUTH KOREA
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Abstract

Electrical properties of ZnO-CuO ceramic composites with varying composition were investigated. The electrical conductivity increased with increasing CuO volume fraction between 1 mol% to 95 mol%. Impedance response showed three semicircles, indicating three resistive elements contributing to the total resistance of the composite. A new model based on the equivalent circuits was developed to explain the contribution of grain boundaries to the resistance of the composite. The change of electrical conductivity was explained by the probability change of two equivalent circuits.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 357: Symposium C – Structure and Properties of Interfaces in Ceramics , 1994 , 395
Copyright
Copyright © Materials Research Society 1995

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