乙二胺四乙酸配位螯合法制备钴铝尖晶石蓝色颜料  

Blue pigment cobalt-aluminum spinels prepared by ethylene eiamine tetraacetic acid chelating ligand

作　　者：黄志良[1] 胡名卫[1] 殷晴[1] 王宏全[1] 夏浩孚[1] 詹刚[1] 陈常连[1] 池汝安[2] 

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430074 [2]武汉工程大学化工与制药学院,湖北武汉430074

出　　处：《武汉工程大学学报》2013年第5期38-42,共5页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(No.51242010);国家973预研项目(No.2011CB411901);教育部长江学者与创新团队项目(No.IRT974)

摘　　要：提出一种可以在较低温度下焙烧制备出钴铝尖晶石蓝色颜料的方法.以六水合硝酸钴、九水合硝酸铝为主要原料,乙二胺四乙酸(EDTA)为配位螯合剂,通过EDTA配位螯合钴、铝得到有机配合物前驱体,经过焙烧制备钴蓝颜料.通过X射线衍射和国际照明委员会的色度图谱分别对所制备样品的物相和呈色进行研究表征.主要考察了钴铝比、反应体系pH值、焙烧温度等工艺条件对铝酸钴尖晶石相的完整性和颜料呈色的影响.研究结果表明,焙烧温度对颜料的物相完整性和呈色的影响最大,钴铝比和反应过程中的pH值对颜料的物相完整性和呈色的影响其次;当钴铝比比值大于或等于1∶2.5时,前驱体经700℃和900℃热处理制备出的尖晶石相颜料分别呈灰蓝色和钴蓝色;钴铝比比值低于1∶2.5时,在上述同样温度下制备出的尖晶石相颜料呈灰蓝色;pH值低于9时,不能形成紫红色的透明前驱体溶液.制备钴铝尖晶石蓝色颜料的最佳工艺参数是钴铝比为1∶2.5,pH值为9～10,900℃温度下保温时间为2h.A method was proposed to prepare cobalt aluminum spinel blue pigment under a relatively low temperatures. Cobalt aluminum spinels were prepared by the thermal decomposition of EDTA chelating cobalt and aluminum complex precursors which were derived from metal nitrate salts and ethylenediamine tetraacetic acid （EDTA）, using EDTA as chelating agent and Cobalt Nitrate hexahydrate and Aluminum nitrate nonahydrate as the precursors. The phase and coloration of the prepared samples were characterized by X Ray Diffraction and the Commission International Eclairage chromaticity diagram. The mainly effects on the coloration and crystalline phase of the samples, involving cobalt-aluminum ratio,pH value of the reaction system and the calcination temperature were systematically investigated. The results show the most significant factor is calcination temperature, next is the pH value on the process of the reaction and the cobalt-aluminum ratio. Crystalline phase pigment shows gray blue and cobalt blue when the cobalt-aluminum ratio is higher than or equal to 1 ： 2.5 and the precursors are treated at 700 ℃ and 900 ℃ respectively. Gray blue pigment is showed when the cobalt-aluminum ratio is below 1 ： 2.5. Purple transparent precursor solution can not be observed when pH value of the reaction system is under 9. The optimum process parameters to prepare cobalt aluminum spinel blue pigment are the temperature of 900 ℃with 2 h heat preservation, the pH value of 9-10, and the cobalt-aluminum ratio of 1 ： 2.5 in the precursors.

关 键 词：乙二胺四乙酸 正交试验 前驱体 尖晶石 配位螯合 

分 类 号：TQ174.45[化学工程—陶瓷工业]