固相法合成纳米MgO和NiO的实验探究

The Experiment of Solid Phase Synthesis of Nanometer MgO and NiO

以MgCl2.6H2O、NiSO4.6H2O和NaOH为原料,用固相法合成了MgO、NiO颗粒。研究了不同焙烧温度对纳米MgO晶化和粒径的影响以及不同的升温速率对纳米NiO粒径和结晶的影响。采用X射线衍射、透射电镜分析方法研究了样品的性能。结果表明,采用固相法可以制备分散均匀、平均粒径为45～70nm的MgO、5～10nm的NiO,均属于立方晶系,呈立方形形态;300℃时MgO微粒粒径最小,700℃时结晶最好;升温速率对NiO微粒的粒径和晶化过程有少许影响。

Nanometer MgO and NiO were synthesized by solid-state reaction between MgCl2·6H20、NiSO4·6H2Oand NaOH. The effect of calcination temperature on the particle-size and crystallization of MgO, and effect of temperature rise rate on the nanometer NiO size and crystallization were studied. The structure, particle-size and mor- phology of MgO and NiO were examined by XRD,TEM techniques. The result indicates that solid-phase method can prepare uniformly dispersed, average particle size 45-70 nm MgO, 5--10 nm NiO and they all belong to the cubic sys- tem, cube-shaped morphology. At 300 ℃, the particle-size of MgO is the smallest; at 700℃, the crystallinity is the best. There is no relation between the nanometer NiO size, crystallization and temperature rise rate.