Fe(OH)_2热解制备γ-Fe_2O_3  

Preparation of Maghemite by Pyrolysis of Ferrous Hydroxide

作　　者：章忠秀[1] 刘泉[1] 施新宇[1] 吴东辉[1] 

机构地区：[1]南通大学化学化工学院,江苏南通226007

出　　处：《南通航运职业技术学院学报》2006年第3期41-43,共3页Journal of Nantong Vocational & Technical Shipping College

摘　　要：用硫酸亚铁为原料,加NH_3·H_2O得到的氢氧化亚铁作前驱物经干燥后,在有CO_3^(2-)存在下热解可得γ-Fe_2O_3。实验结果显示:前驱物经微波干燥得到的产物分散性比真空干燥法好且粒径减小;而前驱物在无CO_3^(2-)存在时热解产物却为α-Fe_2O_3。并采用XRD、TEM等方法对产物进行了表征。Maghemite is prepared by pyrolysis of ferrous hydroxide as precursors after drying in the presence of CO3^2-. Experiment results show that if the precursors through microwave drying, the dispersity of product would be better and the particle size less than vacuum drying method. In contrast, hematite is obtained through pyrolysis of the same precursors in the absence of CO32. The products are characterized by XRD, TEM methods.

关 键 词：Γ-FE2O3 微波干燥 热解 

分 类 号：TQ174.75[化学工程—陶瓷工业]