多元醇还原制取球形钴粉

以自制 Co(OH) 2 为原料 ,乙二醇为溶剂和还原剂 ,制得了分散性很好的球形超细钴粉。研究了单位体积乙二醇中 Co(OH) 2 加入量对钴粉的粒径和形貌的影响。用SEM、XRD、BET和激光粒度分析仪测试粉体的粒子形貌、晶体结构、比表面积和粒度分布。测试结果表明多元醇还原的钴粉为球形 ,以面心立方晶体为主 ,还有微量的简单六方 ;钴粉粒度分布较窄 ,平均粒径为 0 .88μm,比表面积为 3 .46m2 /g,钴含量 >99.5 %。

Preparation of Cobalt Powder for Cemented Carbides by Glycol Reduclng

The spherical,monodispersed,ultrafine cobalt powder has been fabricated by reducing cobalt hydroxide with glycol.The effect of cobalt hydroxide dosage on the morphology and particle size was investigated.The particles were characterized by the X-ray diffraction(XRD),scanning electron microscope(SEM),laser diffraction particle size analyzer and BET specific surface analysis.The XRD shows that the cobalt powder exists mostly in face centered cubic (fcc) structure,a little in simple hexagonal.The cobalt powder,Prepared atCo(OH) 260g/L,its average particle size,specific surface area,chemical content of cobalt powder were 0.88μm,3 46m 2/g,and more than 99.5% respectively.