行星球磨法加工制备SiC超细粉  

Preparation of SiC Fine Powders by Ball-Milling

作　　者：申玉芳[1] 张振军[1] 邹正光[1] 

机构地区：[1]桂林工学院有色金属材料及其加工新技术省部共建教育部重点实验室,桂林541004

出　　处：《材料导报》2005年第F05期152-154,共3页Materials Reports

基　　金：广西自然科学基金资助项目（桂科自0339073）;广西高校中青年学科带头人基金（桂教人[2002]467号）;广西新世纪十百千人才工程基金（2002210）

摘　　要：用行星式球磨机对平均粒径约为10μm的SiC粉料进行了球磨，酸洗，制粉。发现粉料在酸化除铁过程中产生的硬团聚为Fe（OH）3胶桥所致；另外，测试溶液接近SiC等电点致使颗粒发生团聚，亦是粒度测试结果偏大的原因所在。深入分析了其物理化学变化过程与机理，制备出平均粒径为523nm的SiC粉料。SiC powders of 10μm in average diameter are processed by planetary-milling machine and fine powders of 523nm in mean size are made. It is determined that aggregated particles are formed while pickling because of the formation of Fe（OH） 3 colloidal bridge, and reach the value around the isoelectric point （IEP）of SiC. The relationship between the granularity and milling time （h） is studied, so is the physical and chemical transformation during the Fe^2＋ -removing process. Resuits show that SiC powders in sub-micron or even smaller size can be prepared by this method.

关 键 词：行星式球磨 粒度 SIC微粉 Fe(OH)3胶桥 

分 类 号：TF123.1[冶金工程—粉末冶金]