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用化学共沉淀法制备了复合氧化物YFeO3镁掺杂固溶体Y1-xMgxFeO3气敏半导体材料，并对其相组成、电导和气敏性能进行了研究．结果表明：Mg2+在YFeO3的A位固溶范围为0≤x≤0.8；电导测量显示，该p型固溶材料电导突变温度较纯相YFeO3低100℃以上；900℃下灼烧4h所得的Y0.94Mg0.06FeO3粉料制作的元件在257℃时对乙醇灵敏度最高，对4．5μmol／L乙醇的灵敏度高达44;选择性较好，4．5μmol／LC2H5OH的灵敏度是45μmol／LPetrol的4．0倍．
The Y1-xMgxFeO3 gas-sensing semiconductor materials doped with YFeO3-Mg-doped solid solution were prepared by chemical coprecipitation method. The phase composition, electrical conductance and gas sensitivity were also studied. The results show that the solid solution range of Mg2 + in YFeO3 is 0≤x≤0.8. The conductance measurements show that the temperature at which the conductance mutation temperature of p-type solid solution material is 100 ℃ lower than that of pure phase YFeO3 and Y0 The element made of 94Mg0.06FeO3 powder has the highest sensitivity to ethanol at 257 ℃, the sensitivity to 4.5μmol / L ethanol is up to 44, the selectivity is better, the sensitivity of 4.5μmol / LC2H5OH is 45μmol / LPetrol 4.0 Times