Defect disorder of TiO2 equilibrium constant for the formation of oxygen vacancies

Janusz Nowotny; Tadeusz Bak; Mohammad A. Alim

doi:10.1149/2.0011411ssl

Defect disorder of TiO2 equilibrium constant for the formation of oxygen vacancies

Janusz Nowotny, Tadeusz Bak, Mohammad A. Alim

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Abstract

The present work reports the electrical conductivity for Nb-doped TiO2 single crystal at elevated temperatures (1223 K–1298 k) in the gas phase of controlled oxygen activity [10−10 Pa < p(O2) < 10 Pa]. The effect of oxygen activity on the electrical conductivity is considered in terms of defect disorder of TiO2 and the related semiconducting properties. Application of the mass action law and the related charge neutrality conditions results in equilibrium constant for the formation of oxygen vacancies in TiO2 (rutile). It is shown that the ionization degree of niobium in Nb-doped TiO2 is 70%. NOTE: SOME OF THE SCIENTIFIC SYMBOLS CAN NOT BE REPRESENTED CORRECTLY IN THE ABSTRACT. PLEASE READ WITH CAUTION AND REFER TO THE ORIGINAL ARTICLE.

Original language	English
Pages (from-to)	Q71-Q75
Number of pages	5
Journal	ECS Solid State Letters
Volume	3
Issue number	11
DOIs	https://doi.org/10.1149/2.0011411ssl
Publication status	Published - 2014

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title = "Defect disorder of TiO2 equilibrium constant for the formation of oxygen vacancies",

abstract = "The present work reports the electrical conductivity for Nb-doped TiO2 single crystal at elevated temperatures (1223 K–1298 k) in the gas phase of controlled oxygen activity [10−10 Pa < p(O2) < 10 Pa]. The effect of oxygen activity on the electrical conductivity is considered in terms of defect disorder of TiO2 and the related semiconducting properties. Application of the mass action law and the related charge neutrality conditions results in equilibrium constant for the formation of oxygen vacancies in TiO2 (rutile). It is shown that the ionization degree of niobium in Nb-doped TiO2 is 70%. NOTE: SOME OF THE SCIENTIFIC SYMBOLS CAN NOT BE REPRESENTED CORRECTLY IN THE ABSTRACT. PLEASE READ WITH CAUTION AND REFER TO THE ORIGINAL ARTICLE.",

author = "Janusz Nowotny and Tadeusz Bak and Alim, {Mohammad A.}",

year = "2014",

doi = "10.1149/2.0011411ssl",

language = "English",

volume = "3",

pages = "Q71--Q75",

journal = "ECS Solid State Letters",

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publisher = "The Electrochemical Society",

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}

TY - JOUR

T1 - Defect disorder of TiO2 equilibrium constant for the formation of oxygen vacancies

AU - Nowotny, Janusz

AU - Bak, Tadeusz

AU - Alim, Mohammad A.

PY - 2014

Y1 - 2014

N2 - The present work reports the electrical conductivity for Nb-doped TiO2 single crystal at elevated temperatures (1223 K–1298 k) in the gas phase of controlled oxygen activity [10−10 Pa < p(O2) < 10 Pa]. The effect of oxygen activity on the electrical conductivity is considered in terms of defect disorder of TiO2 and the related semiconducting properties. Application of the mass action law and the related charge neutrality conditions results in equilibrium constant for the formation of oxygen vacancies in TiO2 (rutile). It is shown that the ionization degree of niobium in Nb-doped TiO2 is 70%. NOTE: SOME OF THE SCIENTIFIC SYMBOLS CAN NOT BE REPRESENTED CORRECTLY IN THE ABSTRACT. PLEASE READ WITH CAUTION AND REFER TO THE ORIGINAL ARTICLE.

AB - The present work reports the electrical conductivity for Nb-doped TiO2 single crystal at elevated temperatures (1223 K–1298 k) in the gas phase of controlled oxygen activity [10−10 Pa < p(O2) < 10 Pa]. The effect of oxygen activity on the electrical conductivity is considered in terms of defect disorder of TiO2 and the related semiconducting properties. Application of the mass action law and the related charge neutrality conditions results in equilibrium constant for the formation of oxygen vacancies in TiO2 (rutile). It is shown that the ionization degree of niobium in Nb-doped TiO2 is 70%. NOTE: SOME OF THE SCIENTIFIC SYMBOLS CAN NOT BE REPRESENTED CORRECTLY IN THE ABSTRACT. PLEASE READ WITH CAUTION AND REFER TO THE ORIGINAL ARTICLE.

UR - http://handle.uws.edu.au:8081/1959.7/548599

U2 - 10.1149/2.0011411ssl

DO - 10.1149/2.0011411ssl

M3 - Article

SN - 2162-8742

VL - 3

SP - Q71-Q75

JO - ECS Solid State Letters

JF - ECS Solid State Letters

IS - 11

ER -

Defect disorder of TiO2 equilibrium constant for the formation of oxygen vacancies

Abstract

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