Thermoelectricity of BaTiO3+δ

Thermoelectricity of mixed ionic electronic conductor BaTiO sub(3+ delta ) is thermodynamically analyzed, and measured across the mixed n/p regime of both undoped and 1.8 m/o A1-doped BaTiO sub(3) at elevated temperatures. There can be 4 different measurement conditions with respect to the nonstoich...

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Bibliographic Details
Published in:Journal of electroceramics 2001-03, Vol.6 (1), p.61-74
Main Authors: YOO, Han-Ill, SONG, Chang-Rock
Format: Article
Language:English
Subjects:
Barium titanates
Ceramics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity phenomena in semiconductors and insulators
Conductors (devices)
Electronic transport in condensed matter
Electronics
Exact sciences and technology
Isotherms
Migration
Mixed conductivity and conductivity transitions
Physics
Thermoelectric and thermomagnetic effects
Thermoelectricity
Transport
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Summary:Thermoelectricity of mixed ionic electronic conductor BaTiO sub(3+ delta ) is thermodynamically analyzed, and measured across the mixed n/p regime of both undoped and 1.8 m/o A1-doped BaTiO sub(3) at elevated temperatures. There can be 4 different measurement conditions with respect to the nonstoichiometry ( delta ) redistribution and types of atmosphere gases used to control the surrounding oxygen potential, which lead to differences in information content of the thermopower. Experimental thermopower isotherms are exhaustively analyzed to find that the ionic contribution is evident in the mixed n/p regime and that the heats of transport of electrons and holes are about the same as their migration enthalpies.
ISSN:1385-3449
1573-8663
DOI:10.1023/A:1011425920963