摘要
本文以氧化镁和碳酸铵为原料,以表面活性剂A17为分散剂,采用直接转化法成功地制备了平均粒度为60nm的氧化镁粉体。通过热力学核算,从理论上证明该方法是可行的。单因素实验及正交实验表明,制备纳米氧化镁的最优化工艺条件为:反应温度76℃,反应时间90 min,碳酸铵溶液的浓度为0.35 mol/L,氧化镁与碳酸铵摩尔比1∶1.3,表面活性剂A17加入量为反应溶液质量的0.5‰,并用激光粒度分析仪、XRD、TEM和比表面积分析仪对最终产物纳米氧化镁进行了表征,结果表明,样品粒径分布窄、分散性良好,平均粒径为65 nm。该工艺流程简单,制备条件温和,产品质量稳定,适宜于工业化生产。
Taking salvolatile and magnesia as raw materials and taking A17 as surfactant, nanoscale magnesium oxide with particle average diameters of 65nm is prepared by direct thanslation method. The method has been proved feasible in theory by thermodynamic calculating. The optimal preparation parameters are obtained by orthogonal experiments with five factors and four levels and single factor experiments. The experimental results show that optimal reaction conditions are as follows: reaction temperature 76 ℃, reaction time 80min,concentration of the reactant[(NH4)2CO3]0.35 mol/L,molar ratio of reactantsf MgO and ( NH4 )2CO3 ] 1 : 1.3, the amount of surface active agent is 0.5%o of the total amount of reactants. Nanoscale magnesium oxide's structure and property are investigated by means of XRD, TEM and BET etc. Compared with the other methods, this method is simple, brief in process , low in cost and more suitable for industrial scale production.
出处
《化工矿物与加工》
CAS
北大核心
2008年第4期15-18,30,共5页
Industrial Minerals & Processing
关键词
直接转化法
纳米氧化镁
碱式碳酸镁
表面活性剂
direct translation method
nanoscale magnesium ox-ide
basic magnesium carbonate
suifactant