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用化学共沉淀法制备了YFeO3 及其掺锌固溶体Y1-xZnxFeO3 气敏材料 ,并对其制备条件、相结构、电导和气敏性能进行了研究 .结果表明 :Fe与Y物质的量比为 1 :1 ,85 0℃以上热处理一定时间可得钙钛矿结构的纯相YFeO3 ;电导测量显示 ,该系列材料呈p型半导体导电行为 ,且固溶体导电优于纯相 .Y0 .94Zn0 .0 6FeO3 电导突变温度40 0℃ ,较纯相YFeO3 低 70℃ ;90 0℃下热处理 4h所得微粉制作的元件对乙醇有较高的灵敏度和较好的选择性 .这种材料可望开发为一类新型酒敏传感器
YFeO3 and its zinc-doped solid solution Y1-xZnxFeO3 were prepared by chemical coprecipitation, and their preparation conditions, phase structure, conductance and gas sensitivity were studied.The results showed that the ratio of Fe and Y was 1: 1, pure phase YFeO3 with perovskite structure can be obtained by heat treatment for more than 85 ℃ for a certain period of time. The conductivity measurements show that the series of materials behave as p-type semiconductor and the conductivity of the solid solution is better than that of pure phase. The conductance of Y0.94Zn0.066Fe03 Temperature 40 0 ℃, lower than the pure phase YFeO3 70 ℃; 90 ℃ 0 ℃ heat treatment 4h the resulting micropowder components of ethanol has a higher sensitivity and better selectivity of this material is expected to be developed into a new type of alcohol sensitive sensor