Defect chemistry of titanium dioxide effect of interfaces

T. Bak; Janusz Nowotny; Maria Nowotny; L. R. Sheppard

Defect chemistry of titanium dioxide effect of interfaces

T. Bak, Janusz Nowotny, Maria Nowotny, L. R. Sheppard

University of New South Wales

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

3 Citations (Scopus)

Abstract

The present work considers two defect disorder models of TiO₂. The first model is based on simplified charge neutrality conditions within narrow ranges of oxygen activity. The second model is derived by using the full charge neutrality condition within the entire range of nonstoichiometry. The present work reports the data on the effect of temperature on electrical conductivity for high purity TiO₂ single crystal and polycrystalline TiO₂. The difference between these two sets of data indicates that grain boundaries of TiO₂ are enriched in donor-type intrinsic defects. This effect is considered in terms of a chemical potential barrier that is formed within the grain boundary layer.

Original language	English
Pages (from-to)	49-55
Number of pages	7
Journal	Journal of the Australian Ceramic Society
Volume	43
Issue number	1
Publication status	Published - 2007
Externally published	Yes

Cite this

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AB - The present work considers two defect disorder models of TiO2. The first model is based on simplified charge neutrality conditions within narrow ranges of oxygen activity. The second model is derived by using the full charge neutrality condition within the entire range of nonstoichiometry. The present work reports the data on the effect of temperature on electrical conductivity for high purity TiO2 single crystal and polycrystalline TiO2. The difference between these two sets of data indicates that grain boundaries of TiO2 are enriched in donor-type intrinsic defects. This effect is considered in terms of a chemical potential barrier that is formed within the grain boundary layer.

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Defect chemistry of titanium dioxide effect of interfaces

Abstract

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