Equilibration kinetics of TiO2 single crystal at elevated temperatures

J. Nowotny; T. Bak; M. K. Nowotny; C. C. Sorrell

doi:10.1002/pssb.200541187

Equilibration kinetics of TiO₂ single crystal at elevated temperatures

J. Nowotny, T. Bak, M. K. Nowotny, C. C. Sorrell

University of New South Wales

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The equilibration kinetics of single-crystal TiO₂ were determined in the rapid kinetics regime (within the first 10 h) within narrow ranges of oxygen activities, p(O₂), under the conditions of 1198-1323 K and p(O₂) = 10^-10 -10⁵ Pa. The to exhibit a complex dependence on p(O₂). Comparison of D_chem for single-crystal and polycrystalline TiO₂ demonstrates that the grain boundaries have a retarding effect on the transport of defects. The present work represents the first assessment of the effect of nonstoichiometry on well defined D_chem for TiO₂ within a wide range of p(O ₂).

Original language	English
Pages (from-to)	R91-R93
Journal	Physica Status Solidi. B: Basic Research
Volume	242
Issue number	11
DOIs	https://doi.org/10.1002/pssb.200541187
Publication status	Published - Sept 2005
Externally published	Yes

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AU - Nowotny, J.

AU - Bak, T.

AU - Nowotny, M. K.

AU - Sorrell, C. C.

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N2 - The equilibration kinetics of single-crystal TiO2 were determined in the rapid kinetics regime (within the first 10 h) within narrow ranges of oxygen activities, p(O2), under the conditions of 1198-1323 K and p(O2) = 10-10 -105 Pa. The to exhibit a complex dependence on p(O2). Comparison of Dchem for single-crystal and polycrystalline TiO2 demonstrates that the grain boundaries have a retarding effect on the transport of defects. The present work represents the first assessment of the effect of nonstoichiometry on well defined Dchem for TiO2 within a wide range of p(O 2).

AB - The equilibration kinetics of single-crystal TiO2 were determined in the rapid kinetics regime (within the first 10 h) within narrow ranges of oxygen activities, p(O2), under the conditions of 1198-1323 K and p(O2) = 10-10 -105 Pa. The to exhibit a complex dependence on p(O2). Comparison of Dchem for single-crystal and polycrystalline TiO2 demonstrates that the grain boundaries have a retarding effect on the transport of defects. The present work represents the first assessment of the effect of nonstoichiometry on well defined Dchem for TiO2 within a wide range of p(O 2).

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JF - Physica Status Solidi. B: Basic Research

IS - 11

ER -

Equilibration kinetics of TiO₂ single crystal at elevated temperatures

Abstract

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