纳米氧化铁粉体的溶胶-凝胶法制备  

Sol-Gel Preparation of Fe_2O_3 Nanopowders

作　　者：伍媛婷[1] 王秀峰[1] 李二元[1] 李清春[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《压电与声光》2010年第5期827-829,共3页Piezoelectrics & Acoustooptics

基　　金：陕西省教育厅科研计划基金资助项目(09JK362);陕西省自然科学基金资助项目(2009JM6008);陕西科技大学自选科学基金资助项目(ZX08-10)

摘　　要：以硫酸亚铁为原料,柠檬酸为螯合剂,通过溶胶-凝胶法制备Fe2O3纳米粒子,采用X-射线衍射(XRD)和差重-热重(TG-DTA)分析研究了Fe2O3晶相的形成过程,用扫描电镜(SEM)对所制得粉体的表面形貌进行了分析。结果表明,煅烧温度应高于520℃,所制备纳米粉体为α-Fe2O3,为球形颗粒,Fe2O3粉体粒度随煅烧温度的升高而增大,煅烧温度为600℃时,可获得30nm的α-Fe2O3颗粒,粉体颗粒大小均匀,分散性好。With ferrous sulfate as starting material and citric acid as chelating agent,Fe2O3 nanopowder was synthesized by Sol-Gel method.The evolution of Fe2O3 crystal phase was investigated by XRD and TG-DTA.The morphology of Fe2O3 nanopowders was studied by SEM.Experimental results showed that the annealing temperature must be higher than 520 ℃.The Fe2O3 particles consisted of α-Fe2O3 only,and the grain morphology appeared with spherical.The crystalline size increased with the increasing of annealing temperature.The particle size was about 30 nm with good dispersion when calcined at 600 ℃.

关 键 词：硫酸亚铁 氧化铁 溶胶-凝胶 柠檬酸 

分 类 号：TQ138.1[化学工程—无机化工]