室温球磨固相化学反应法-氢还原法制备超细球形钴粉  

Preparation of Ultrafine Cobalt Powder by Solid-state Chemical Reaction Method at Ambient Temperature

作　　者：杜小华[1] 蒲勇[1] 朱达川[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610065

出　　处：《热加工工艺》2013年第24期48-50,53,共4页Hot Working Technology

摘　　要：以CoSO4·7H2O·NH4HCO3和适量表面活性剂为原料,采用室温球磨固相化学反应法制备超细球形钴粉,并利用XRD、SEM研究了还原温度、表面活性剂、球磨时间对钴粉的结构、形貌和粒度的影响。研究表明在球料比8颐1,球磨机转速为250 r/min,球磨4 h,表面活性剂为聚乙二醇,还原温度为600℃,还原3h条件下,可制备晶格主要为面心立方结构的Co粉,其球化率和结晶度高,颗粒度为100～150 nm,粒度分布较窄。Ultrafine spherical cobalt powders were successfully synthesized by ball-milling solid-state chemical reaction method in which CoSO4窑7H2O窑NH4HCO3 were used as reactants and the trace active surfactant was added.The effects of reaction temperature,surfactant,ball-milling time on the microstructure,morphologies and grain size distribution of cobalt powder were studied by XRD and SEM.The results show that the cobalt powder with most face-centered cubic structure can be obtained when the mass ratio of mall to material is 8：1,the rotational speed of ball mill is 250 r/min,ball-milling time is 4 h,the surfactant is PEG,reaction temperature is 600℃ and reduction time is 3 h.Moreover,the cobalt particle has spherical shape and good crystallinity,the size is 100-150 nm.

关 键 词：固相化学反应 氢气还原法 超细球形钴粉 

分 类 号：TQ658[化学工程—精细化工]