摘要：采用空气氧化法,以硫酸亚铁和磷酸为铁源和磷源,制备FePO4.2H2O,并在空气气氛下热处理后得到不含结晶水的FePO4粉体,采用X射线衍射、扫描电镜、元素含量分析等对合成产物进行表征。结果表明,当反应原料中铁、磷元素物质的量比为1∶2,反应温度为80℃时,产物为纯FePO4.2H2O,520℃热处理后为FePO4,其他条件下所得产物均含有杂质;聚乙二醇的加入有效抑制了颗粒晶体的长大,改善了颗粒的团聚程度,得到分散均匀的类球形颗粒。
关键词：超细粉体；磷酸铁；空气氧化
Abstract：FePO4.2H2O was prepared by air oxidation method with FeSO4 as the iron source and H3PO4 as phosphorus sources.Ultrafine particles of FePO4 crystal without water were obtained by further heat treatment in air atmosphere.Synthetic products were characterized by XRD,SEM and elemental analysis.The results show that pure FePO4.2H2O can be obtained at the reacting temperature of 80 ℃ and the amount of substance ratio of iron and phosphorus is 1∶ 2 in raw materials.By calcining FePO4.2H2O at 520 ℃,FePO4can be obtained.There are impurities in products at other conditions.Significant decrease in particle size and aggregation are observed by adding polyethylene glycol which help the production of spherical powders disperse uniformly.
Keywords：ultrafine particles;iron phosphate;air oxidation
