Investigation on preparation of nano-size Gd0.2Ce0.8O2-δ material and its humidity sensing properties

被引：10
作者：
Hao, Yu Wen [1 ]
Wang, Jing [1 ]
Chen, Zhou Ye [1 ]
机构：
[1] Dalian Univ Technol, Sch Elect & Informat Engn, Dalian 116023, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE | 2010年 / 45卷 / 05期
关键词：
QUARTZ-CRYSTAL MICROBALANCE; X-RAY PHOTOELECTRON; SENSITIVE PROPERTIES; OXYGEN-TRANSPORT; CERAMIC SENSORS; THICK-FILM; COMPOSITE; CONDUCTIVITY; GEL; SM;
D O I：
10.1007/s10853-009-4092-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The mixed-conductive ceramic oxide Gd0.2Ce0.8O2-delta (GCO) particles with 40-50 nm were synthesized by using a combined citrate and EDTA complexation method. The material was characterized with powder X-ray diffraction, transmission electron microscopy, energy dispersive spectrometry, and X-ray photoelectron spectroscopy. A humidity sensor was fabricated by screening GCO onto a ceramic substrate with a pair of interdigitated electrodes. The sensor shows a linear relationship between logarithm impedance and relative humidity in the range of 33-98% when the measurement frequency range is 20 Hz-1 kHz. Typical response and recovery times of the sensor are 40 and 210 s, respectively, indicating that desorption rate of water molecule inside the GCO material is slower than the adsorption rate. The humidity sensing mechanism was discussed.
引用
收藏
页码：1361 / 1365
页数：5
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