Bulk Conductivity and Defect Chemistry of Acceptor‐Doped Strontium Titanate in the Quenched State
- 1 August 1991
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 74 (8) , 1934-1940
- https://doi.org/10.1111/j.1151-2916.1991.tb07812.x
Abstract
The grain bulk conductivity of acceptor‐doped SrTiO3 ceramics was investigated by the impedance analysis method after quenching from high‐temperature equilibria. The influence of the oxygen partial pressure during equilibration, PEqO2, is described in terms of a defect model for titanates. From a comparison between the experimental results and the predictions of this model, a predominant ionic conductivity is concluded for a wide PEqO2 range (approximately 10−11 to 105 Pa). The influence of the ionization energy of the acceptors and of possible defect association is discussed.Keywords
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