低热固相反应合成纳米氧化镍

Preparation of nanometer NiO by solid-state reaction at low temperature

以氯化镍和草酸铵为原料,首先用室温固相反应制备出前驱体,再在350℃下煅烧2h,获得了纳米氧化镍粉体。用X射线衍射、透射电镜、扫描电镜、电感耦合等离子体(ICP)原子发射光谱仪和化学分析法对产物的组成、大小和形貌进行了表征,研究了煅烧温度和时间对产物粒径的影响。结果表明获得了平均粒径为25nm、分布均匀、无团聚的纳米粉体。

The precursors were prepared by solid state reaction with NiCl2 · 6H2Oand （NH4 ）2C2O4 ·H2O at ambient temperature. The uniform distribution and non - aggregation nanometer NiO with the average size of 25 nm was obtained by decomposing precursors about 2 h at 350℃. The composition, size, appearance and properties of the product were studied by XRD, TEM, SEM, ICP and chemical analysis,and the effects of calcination temperature and time on the size of nanometer NiO were also studied.