尿素均相沉淀法制备均分散氧化亚镍粉末(Ⅰ)——前驱体的制备研究
来源期刊：中南大学学报(自然科学版)1999年第3期
论文作者：郭学益 黄凯 张多默 刘志宏
文章页码：38 - 42
关键词：均相沉淀;尿素;均分散;氧化亚镍;前驱体粒子
Key words：homogeneous precipitation; urea; monodispersed; NiO powders; precursor particles
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.
Abstract: 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.
