【摘要】 采用相转移法研制单分散ａ－Ｆｅ＿２Ｏ＿３超细粉，研究了制备工艺对Ｆｅ＿２Ｏ＿３萃取率的影响，并对起细粉进行了Ｘ射线衍射、透射电镜和红外光谱表征。结果表明：无机溶胶的ｐＨ值、表面活性剂的用量、草取剂等对超细粉的产率有影响，超细粉的颗粒尺寸约４０ｎｍ，为稳定的非晶态单分散Ｆｅ＿２Ｏ＿３．就所制备的超细ａ－Ｆｅ＿２Ｏ＿３粉末的气体灵敏度而言，相转移法优于化学沉淀法。更多还原

【Abstract】 Monodisperse a-Pe2O3 ultrafine powder(UFP)is prepared by phase transformationmethod.The influence factors of extraction ratio(ER)are researched.The structure andcomposition of UFP a-Pe2O3 are characterized by TEM,XRD and IR·As a result of study,pHvalue of inorganic sol,extraction agent,and consumption of DBS have infiuence on ER,parti-cle size of UPP is about 40 nm,its gas-sensing properties is better than that of a-Pe2O3 madeby chemical precipitation.更多还原