摘要
采用尿素均相沉淀法制得了均分散的氧化亚镍前驱体粒子．系统考察了镍离子浓度、尿素浓度、反应温度、反应时间、起始ｐＨ值及分散剂等因素对前驱体粒子形成的影响规律．结果表明，在一定条件下所得的前驱体粒子是一种化学组成为Ｎｉ２（ＣＯ３）（ＯＨ）２的晶态物质，粒子呈球形，且粒度分布均匀．
Monodispersed NiO precursor particles were prepared by homogeneous precipitation from nickel nitrate solution in the presence of urea. The influences of [Ni 2+ ], [CO(NH 2) 2], reaction temperature, reaction time, initial pH values and anti aggregative agent on the precursor particles were investigated systematically. The results show that the desirable products are crystalline, spherical and monodispersed particles and their chemical compositions are identified as Ni 2 (CO 3)(OH) 2.
出处
《中南工业大学学报》
CSCD
北大核心
1999年第3期255-259,共5页
Journal of Central South University of Technology(Natural Science)
基金
国家自然科学基金
关键词
均相沉淀
尿系
均分散
氧化亚镍
镍粉末
前驱体
homogeneous precipitation
urea
monodispersed
NiO powders
precursor particles
