Humidity sensing properties of La^(3+)/Ce^(3+)-doped TiO_2-20 wt.% SnO_2 thin films derived from sol-gel method  

作　　者：李红霞 史志铭 刘红伟 

机构地区：[1]School of Materials Science and Engineering,Inner Mongolia University of Technology [2]Inner Mongolia Research Center of Advanced Materials Engineering & Technology

出　　处：《Journal of Rare Earths》2010年第1期123-127,共5页稀土学报（英文版）

基　　金：supported by the Natioanl Natural Science Foundation of China (50562003)

摘　　要：The humidity sensing properties of La3+/Ce3+-doped TiO2-20 wt.%SnO2 thin films were studied.Sol-gel method was employed to prepare the films on alumina substrates.By constructing a humidity-impedance measuring system,the sensing behaviors were inspected for the films sintered at different temperatures.Experimental results showed that,0.5 wt.% of La2O3 or Ce2O3 doped films sintered at 500 °C for 2 h had the best humidity sensing properties,the impedance decreasing from 109 ? to below 104 ? in the humidity ra...The humidity sensing properties of La3+/Ce3+-doped TiO2-20 wt.%SnO2 thin films were studied.Sol-gel method was employed to prepare the films on alumina substrates.By constructing a humidity-impedance measuring system,the sensing behaviors were inspected for the films sintered at different temperatures.Experimental results showed that,0.5 wt.% of La2O3 or Ce2O3 doped films sintered at 500 °C for 2 h had the best humidity sensing properties,the impedance decreasing from 109 ? to below 104 ? in the humidity ra...

关 键 词：humidity sensing TITANIA thin film rare earths 

分 类 号：O614.331[理学—无机化学]