共沉淀法制备纳米CuO/Al<sub>2</sub>O<sub>3</sub>复合粉体

共沉淀法制备纳米CuO/Al₂O₃复合粉体

摘要: 以NH4HCO3为沉淀剂、CuSO4和NH4Al(SO4)2为母液,采用共沉淀法制备CuO/Al₂O₃复合粉体,用激光粒度分析仪、扫描电镜、X射线衍射仪等研究了母液浓度、沉淀剂浓度、反应温度、pH值等工艺条件对粒径和粒度分布的影响.结果表明：通过控制反应条件,可获得粉体粒径较小、分布较窄的纳米CuO/Al2O3复合粉体;最佳工艺参数为反应温度55 ℃,pH值为7,CuSO4浓度为0.095 mol/L,NH4Al(SO4)2质量浓度为1.67 g/L,NH4HCO3浓度为1.52 mol/L,得到的纳米复合粉体的粒径在60 nm左右.

Abstract: Using NH4HCO3 as precipitator and CuSO4/NH4Al(SO4)2 as mother liquor,CuO/Al2O3 composite powders were prepared by method of co-precipitation.The effects of concentrations of mother liquor and precipitator,reaction temperature and pH on particle size and distribution were investigated by means of laser particle size analyzer,scanning electron microscopy and X-ray diffraction.Results show that tiny sized and narrow distributed nano-CuO/Al2O3 composite powders could be obtained by controlling the reaction parameters as follows,55 ℃ pH7,0.095 mol/L CuSO4,1.67 g/L NH4Al(SO4)2 and 1.52 mol/L NH4HCO3.The mean particle size of the composite powders obtained by the optimized process is about 60 nm.