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Composition-Dependent Electrical Conductivity of Ionic-Electronic Composite

Published online by Cambridge University Press:  10 February 2011

M. Park  and
G. M. Choi
M. Park
Affiliation:
Ohang University of Science and Technology, Dept. of Materials Science and Engineering, Ohang, 790–784, Korea
G. M. Choi
Affiliation:
Ohang University of Science and Technology, Dept. of Materials Science and Engineering, Ohang, 790–784, Korea
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Abstract

Composition. dependence of electrical conductivity of ionic-electronic composite was camined using yttria(8mol%) stabilized zirconia-NiO composites. The contributions of ectronic and ionic charge carriers to the electrical conductivity were determined by Hebb-Vagner polarization technique and electromotive force measurement of galvanic cell. Up to 6 sol% NiO addition, the conductivity decreased since the electronic NiO acted as an insulator in onic matrix. However the ionic transport was dominant until NiO content reaches 26 vol%. Mixed conduction was observed between 26 and 68 vol% of NiO. The effects of composition on he electrical properties were explained by the microstructure and thus by the distribution of two hases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 500: Symposium EE – Electrically Based Microstructural Characterization II , 1997 , 327
Copyright
Copyright © Materials Research Society 1998

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References

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