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.