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Composition Dependence of the Electrical Conductivity of ZnO( n )–CuO( p ) Ceramic Composite
Author(s) -
Jun SeokTaek,
Choi Gyeong Man
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02391.x
Subject(s) - materials science , composite number , electrical resistivity and conductivity , ceramic , resistive touchscreen , composite material , grain boundary , conductivity , volume fraction , grain size , electrical impedance , ceramic composite , electrical resistance and conductance , microstructure , electrical engineering , chemistry , engineering
Electrical properties of semiconducting ZnO( n )‐CuO( p ) ceramic composites with varying composition were investigated. The electrical conductivity increased with increasing CuO volume fraction between 1 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.