工艺条件对溶液雾化氧化法制备Co_3O_4粉末的影响.pdfVIP

学兔兔 第l4卷第5期 粉末冶金材料科学与工程 2009年 10月 VblJ14 No．5 Materials Science and Engineering of Powder Metallurgy Oct．2009 工艺条件对溶液雾化氧化法制备Co3O4粉末的影响 郭学益，冯庆明，郭秋松，田庆华 (中南大学 冶金科学与工程学院，长沙 410083) 摘 要：以COC126H2O为原料，采用溶液雾化氧化法制备Co304粉末，对反应温度、溶液浓度、载气压力等工 艺条件对产物粒子形貌及粒度分布的影响进行系统研究。结果表明，反应温度对Co，o4粉末的形貌和粒度都有影 响，高温下粉末粒度较小，球形度较好，但温度过高会导致粒子团聚；CoCI26H2O溶液的浓度对Co304粉末粒度 也有影响，高浓度下所得Co3o4粉末的粒径较大；雾化压力增大，有利于得到颗粒分布均匀、分散性好的c03o4 粉末，但粉末粒度随之增大。在反应温度为850℃、CoCl26H2O溶液浓度为1．5 mol／L、雾化压力为1．5×10 Pa 的条件下，反应较完全，可制备物相单一的Co304粉末，产物为均匀分布的球形粉末，且粒度分布较窄。 关键词：四氧化三钴；氯化钴；雾化氧化 中图分类号：TB302．2 文献标识码：A 文章编号：1673．0224(2009)5．320-06 Effect of technological conditions on preparation of Co304 powders by solution spray-oxidation GUO Xue。yi，FENG Qing—ming，GUO Qiu·song，TIAN Qing—hua (School ofMetallurgical Science and Engineering，Central South University,Changsha 410083，China) Abstract：High quality Co304 powder was prepared from COC12’6H20 solution by spray-oxidation method．The effects of reaction temperature，concentration of aqueous CoCI2 6H20 solution as well as atomizing air pressure on the morphology and particle size distribution of Co304 particles were investigated systematically．11 results show that the reaction temperature has effect on both the morphology and particle size distribution of Co304 particles．The powder with better spherical morphology and smaller particle size can be obtained at hi gher reaction temperature．Th e concentration of aqueous CoCl2‘6H20 also has effe