Oxygen detection in sol-gel derived titania thin films doped with tantalum

被引：13

作者：

Kajihara, K ^{[1
]}

Yao, T ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Energy Sci, Dept Fundamental Energy Sci, Sakyo Ku, Kyoto 6068501, Japan

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1999年 / 1卷 / 08期

关键词：

D O I：

10.1039/a900330d

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：

The influence of O-2 upon electrical properties has been examined on anatase titania (TiO2) thin films prepared by a sol-gel dip-coating method. When O-2 is turned on, a rapid and considerable decrease in electrical conductivity is detected at 500 degrees C in the TiO2 film doped with Ta, although the conductivity remains almost constant in a pure TiO2 film. A complex impedance analysis reveals that the variation of conductivity is mainly dominated by the grain-boundary resistance. Surface segregation of Ta ion is suggested at higher Ta concentration by X-ray diffraction analysis.

引用

页码：1979 / 1983

页数：5

共 33 条

[31] ELECTRICAL-PROPERTIES OF TIO2-K2TI6O13 POROUS CERAMIC HUMIDITY SENSOR [J].