An investigation of response time of TiO2 thin-film oxygen sensors

被引：65
|
作者：
Li, MQ
Chen, YF
机构：
[1] China Building Materials Academy
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 1996年 / 32卷 / 01期
关键词：
titania; thin films; oxygen sensors;
D O I：
10.1016/0925-4005(96)80113-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
TiO2 thin-film oxygen sensors have been made by a sol-gel process. The TiO2 thin film is formed on an alumina rod by dip-coating of a titania sol derived from titanium butanol alkoxide solution in ethanol. The dependence of the resistance (R) of the TiO2 film on the oxygen partial pressure (P-O2) and temperature (T) has been determined. The TiO2 thin-film oxygen sensor possesses linear relations between lg(R) and lg(P-O2) with temperature-dependent slopes. The response time of the TiO2 thin-film sensor is shorter for an atmosphere change from oxygen rich to lean than that from oxygen lean to rich. The response time decreases with increasing temperature. A platinum coating on the TiO2 surface reduces the response time.
引用
收藏
页码：83 / 85
页数：3
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