【摘要】 用化学共沉淀与固相反应相结合的方法，在α－Ｆｅ＿２Ｏ＿３中掺入一定量的锑离子。Ｘ射线衍射（ＸＲＤ）分析表明，掺锑量（Ｓｂ／Ｆｅ原子比）小于０．２．材料仍保持小Ｆｅ＿２Ｏ＿３的晶体结构，但是加入量＞０．２时，有铁、锑复合氧化物生成。通过分析Ｓｂ的掺入对α－Ｆｅ＿２Ｏ＿３的晶粒生长及电学性质的影响，认为该系列材料的气敏性能有大幅度的提高，是锑的掺入改变了α－Ｆｅ＿２Ｏ＿３的气敏机理。更多还原

【Abstract】 Sb doped α-Fe₂O₃ powders wereprepared by coprecipitation and solid state reactionmethods,The phases and structure of the powderswere identified by X-rays diffraction（XRD）.WhenSb/Fe < 0.2.the structure of the powders wassimilar to that of α-Fe₂O₃（corundum structare）,whereas Sb/Fe > 0.2,Fe₂O₃-Sb₂O₃ complex oxides（Fe₂Sb₂O₇）were formed.Moreover,the effect of Sbdoping on grain size and electric properties wasstudied,Gas sensitivity of Sb doped α-Fe₂O₃ wasimproved remarkably,which was attributed to thechange of gas sensing mechanism.更多还原