Ambipolar diffusion in TiO2

被引：21

作者：

Radecka, M

Sobas, P

Rekas, M

机构：

[1] Stanislaw Staszic Univ Min & Met, Dept Inorgan Chem, PL-30059 Krakow, Poland

[2] Australian Nucl Sci & Technol Org, Div Mat, Lucas Hts Sci & Technol Ctr, Menai, NSW 2234, Australia

来源：

SOLID STATE IONICS | 1999年 / 119卷 / 1-4期

关键词：

chemical diffusion; ambipolar diffusion; titanium dioxide; rutile; electrical conductivity;

D O I：

10.1016/S0167-2738(98)00483-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Oriented (100) single crystal of titanium dioxide (rutile) was equilibrated at an ambient oxygen partial pressure p(O-2) 10(-15) to 10(5) Pa, over the temperature range 900-1400 K. After the step change of p(O-2) to a new value, the equilibration kinetics was monitored by measuring electrical conductivity. Application of the Fick's second law to the kinetic data gave the chemical (ambipolar) diffusion coefficient for both oxidation and reduction runs. The chemical diffusion coefficient D-chem was found invariant with oxygen partial pressure. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：55 / 60

页数：6

共 31 条

[1] ISOTHERMAL TRANSPORT IN TIO2-X .1. ELECTROMIGRATION IN TIO2-X [J].