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采用α－ＦｅＯＯＨ脱水法合成了Ｍｎ，Ｃｏ，Ｎｉ，Ｚｎ等二价金属离子掺杂的α－Ｆｅ２Ｏ３气敏材料，用Ｘ射线衍射仪测定了材料的结构和组成；用动态气敏测试法测试了气氛、温度对α－Ｆｅ２Ｏ３电导和气敏性能的影响；用空间电荷层模型讨论了这些材料的气敏机理。
Α-Fe2O3-doped α-Fe2O3 gas-sensitive materials doped with Mn, Co, Ni and Zn were synthesized by α-FeOOH dehydration method. The structure and composition of the samples were measured by X-ray diffractometer. The effects of atmosphere and temperature on the conductance and gas sensing properties of α-Fe2O3 were discussed. The gas sensing mechanism of these materials was discussed with the space charge layer model.