Sol—Gel法制备钙钛矿型复合氧化物YFeO3气敏材料  

Preparation of Perovskite Type Complex Oxide YFeO3Gas-sensing Material by Sol-Gel Method

作　　者：葛秀涛[1] 李永红[1] 刘杏芹[2] 沈瑜生[2] 

机构地区：[1]滁州师范专科学校化学系, [2]中国科学技术大学材料科学与工程系,

出　　处：《化学学报》2001年第3期311-315,共5页Acta Chimica Sinica

基　　金：安徽省教育厅自然科学基金

摘　　要：用溶胶-凝胶法制备了YFeO3气敏材料，并对其制备条件，导电行为和气敏效应作了系统研究.结果表明：铁钇物质的量之比n(Fe3+)：n(Y3+)=1:1，800℃下热处理2h可得纯相钙钛矿型复合氧化物YFeO3；电导测量显示，该材料呈p型半导体导电行为.2h预烧凝胶粉在800℃下热处理3h所得微粉制作的元件的电导突变温度为400℃，对乙醇有较高的灵敏度和良好的选择性，有望开发为一类新型酒敏传感器.YFeO3 gas - sensing materials were prepared by sol - gel method. The preparation conditions, phase constituents, conductance and gas - sensing properties were investigated. The result shows that pure phase YFeO3 can be obtained when calcining for two hours at 800 degreesC with the ratio of substance Fe3+ to Y3+( n(Fe)(3+) : n(Y)(3+)) being 1:1. The YFeO3 thus obtained is a p - type semiconductor. The temperature of conductance sudden change for the element made of powder with 2h preheating gel calcined at 800 degreesC for 3h is only 400 degreesC, with good. sensitivity and selectivity to C2H5OH. This material is possible to be developed into a new type of ethanol - sensing sensor.

关 键 词：气敏效应 气敏材料 钇 铁 钙钛矿型复合氧化物 制备 溶胶-凝胶法 

分 类 号：TB381[一般工业技术—材料科学与工程]