摘要
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.
基金
国防预研基金(510405050205BQ02)
关键词
纳米微粒
氧化镁
氧化镍
固相法
nanometer particle, MgO, NiO, solid-phase synthesis