Preparation and Characterization of Nanometer Iron Oxide by Sol-Gel Method and Supercritical Fluid Drying Technology

摘要：

　　Iron oxide nanometer powders were prepared by using sol-gel method and the supercritical fluid drying technology (SCFD) from inorganic salts.The characteristics of the iron oxide nanometer powders were characterized systematically.The results showed that the drying and crystallization of the production could be achieved in one step by SCFD method; furthermore,a highly dispersed,size uniformed and with better crystallization magnetite (Fe3O4) nanoparticles can be obtained.Phase transformation of the as-synthesized powders occurs at about 80℃,and only hematite (α-Fe2O3) can be obtained when being heated at temperatures higher than 400℃.The production synthesized by SCFD exhibits significant magnetic properties.As the heat-treated temperature increase,the magnetic properties of the sample decrease gradually.

关键词： Sol-gel method SCFD Iron oxide Aerogel

作者: Yu Zhang Jianxin Cao Dengpan Nie Fei Liu Yonggang Dong

作者单位: College of Chemical Engineering,Guizhou University,Guiyang,550003,China Guizhou Institute of Metallurgy and Chemical Engineering,Guiyang,550002,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 617-619

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）