YFe1-yCoyO3半导体气敏材料的制备和性能研究

无机材料学报, 2002, 17(3): 526-530.

YFe_1-yCo_yO₃半导体气敏材料的制备和性能研究

1.1. 滁州师范专科学校化学系, 安徽滁州 239012

2. 2. 滁州师范专科学校物理系, 安徽滁州 239012

Chuzhou 239012

China

2. 2. Department of Physics Chuzhou Normal College. Chuzhou 239012. China

3. 3. Department of Materials Science and Engineering University of Science and Technology of China, Hefei 230026, China

关键词：钴掺杂 , YFe_1-yCo_yO₃ solid solution , conductance: alcohol sensor , null

Preparation and Gas-sensing Properties of YFe_1-yCo_yO₃ Semiconducting Materials

GE Xiu-Tao , FENG Jian , HOU Chang-Ping , LI Yong-Hong , NI Shou-Chun , LIU Xing-Qin

Keywords： cobalt doping , YFe_1－yCo_yO₃固溶体 , 电导 , 酒敏传感器

用化学共沉淀法制备了YFe_1-yCo_yO₃ (０．０≤ｙ≤０．５０)固溶纳米晶微粉,并对其制备条件、物相组成、微结构、电导和气敏效应作了系统研究．结果表明:钴Ｂ位掺杂铁酸钇材料呈典型的Ｐ型半导体导电行为,同温下固溶体电导不仅大于纯相ＹＦｅＯ_３的电导而且随湿度增加其电阻迅速下降;２４３℃下ＹＦｅ_０.９Ｃｏ_０．１Ｏ_３传感器元件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Ｃ_２Ｈ_５ＯＨ信息敏感材料．

The nano-crystal powders of perovskite-type solid solution YFe_1-yCo_yO₃ (0≤y≤0.50) were prepared by chemical coprecipitation. The preparation conditions, phase constituents, conductance and gas-sensing properties were investigated. The results demonstrated that YFe_1-yCo_yO₃ shows p-type semiconducting properties and it has high sensitivity and good selectivity to C₂H₅OH when y=0.10.

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