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Influence of High Oxygen Partial Pressure on the Positive Temperature Coefficient Resistivity of BaTiO3

Published online by Cambridge University Press:  15 February 2011

Ben Huybrechts ,
K. Ishizaki  and
M. Takata
Ben Huybrechts
Affiliation:
Nagaoka University of Technology, Nagaoka 940–21, Japan
K. Ishizaki
Affiliation:
Nagaoka University of Technology, Nagaoka 940–21, Japan
M. Takata
Affiliation:
Nagaoka University of Technology, Nagaoka 940–21, Japan
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Abstract

The influence of high oxygen partial pressures on the PTC behavior of non acceptor doped BaTiO3 is studied by using oxygen-hot-isostatic-press (O2-HIP). Annealing in high oxygen partial pressures increased the maximum resistivity with a factor 3, also the minimum resistivity and the gradient in the Arrhenius plot, i.e. resistivity versus the reciprocal of the temperature, increased. The results are analyzed using the well accepted Heywang model. The changes after O2-HIPping can be explained with an increase in acceptor density at the grain boundaries.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 251: Symposium S – Pressure Effects on Materials Processing and Design , 1991 , 239
Copyright
Copyright © Materials Research Society 1992

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References

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