沉淀—共沸蒸馏法制备纳米级氧化铬粉体的研究  

PREPARATION OF NANOMETER SIZED CHROMIUM OXIDE USING PRECIPITATION-AZEOTROPIC DISTILLATION METHOD

作　　者：胡国荣[1] 李国[1] 胡国华[1] 彭忠东[1] 邓新荣[1] 曹雁冰[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《粉末冶金工业》2006年第6期14-17,共4页Powder Metallurgy Industry

摘　　要：本文利用沉淀-共沸蒸馏法制备纳米级氧化铬,并采用热重/差示扫描法(TG-DTA)、扫描电镜(SEM)和X射线衍射(XRD)等现代分析测试技术对样品性能进行表征。结果表明,用正丁醇共沸蒸馏能有效地防止干燥过程中颗粒间的硬团聚,获得分散性良好的粉体,其平均粒径约为50 nm,形貌为球形。同时对该工艺防止硬团聚形成的机理进行了初步讨论。Nanometer sized chromium oxide with narrow size distribution band were successfully prepared using aprecipitation - azeotropic distillation method.The morphological structure and properties were characterized by TG- DTA,SEM and XRD measurements. The results show that n- butanol azeotropic distillation can effectively prevent the formation of hard agglomerates in drying process, and good dispersed spherical nanopowders can be obtained, with an average size of 50 nm. The mechanism which n - butanol azeotropic distillation prevents the formation of hard agglomerates is discussed.

关 键 词：纳米粉体 氧化铬 共沸蒸馏 

分 类 号：O614.611[理学—无机化学]