草酸钴循环氧化还原法制备粗颗粒CoO  

Coarse-grained CoO Prepared With Cobalt Oxalate Through Circulatory Oxidization-Reduction Method

作　　者：傅小明[1] 范钧[1] 刘照文[1] 

机构地区：[1]宿迁学院计算机科学系,江苏宿迁223800

出　　处：《中国粉体技术》2011年第1期32-34,共3页China Powder Science and Technology

基　　金：江苏省大学生实践创新训练计划项目;编号:2010SSJ02;宿迁学院高级人才启动基金项目(编号:SQCGJ2010002)的支持

摘　　要：以草酸钴为原料,通过草酸钴在空气中热分解为CoO,然后将此CoO在高纯、露点低于-40℃的氢气中进行还原,CoO还原的钴粉在空气中被氧化为CoO,如此反复进行。利用扫描电子显微镜和激光粒度分析仪对试样进行形貌和粒度表征。结果表明:经过循环两次还原和两次氧化,可以制备出粒径分布在9～21μm之间颗粒的体积分数为77.10%的粗颗粒CoO粉。The CoO particles were prepared with cobalt oxalate dihydrate by heat decomposition in air,then the cobalt particles were obtained with CoO through deoxidation in the hydrogen gas （high purity, dew point below -40 ℃ ）. The cobalt particles were oxidized in air, and CoO particles were reduced into cobalt particles in the hydrogen gas again. The samples were characterized with the laser particle size distribution measuring instrument and the electron probe scan instrument. The results showed that the medium-sized CoO particles were obtained through the twice circulatory oxidation and the twice reduction. The volume fraction of the particle size distribution of coarse-grained CoO particles was 77,10% in size of 9- 21μm.

关 键 词：热分解 循环氧化还原 粗颗粒 

分 类 号：TF123.2[冶金工程—粉末冶金]