摘要
以六水氯化镁和尿素为原料,以聚乙二醇辛基苯基醚为分散剂,采用均匀沉淀法制备出颗粒直径约为20-30nm的氧化镁粉体。通过四因素三水平正交试验确定了液相反应条件对纳米氧化镁晶粒直径的影响程度和最佳液相合成条件。结果表明,影响纳米氧化镁晶粒直径的液相反应因素主次顺序依次为:反应物(六水氯化镁)浓度、反应时间、反应物配比(尿素和六水氯化镁的物质的量比)及反应温度。以纳米氧化镁粉体晶粒直径为控制指标的最佳液相反应条件为:反应物浓度1.5mol/L,反应时间3h,反应物配比5:1,反应温度99℃。
The magnesia nanopowder with particle diameters of 20 + 30 nm is prepared by homogeneous precipitation method with MgC12· 6H2O and CO( NH2) 2 as raw materials and OP - 10 as dispersant. The process is studied and the optimal reaction condition is obtained by orthogonal experiments. The experimental results show that the crystal diameter of magnesia nanopowder is mostly influenced by concen- tration of the reactant (MgCl2·6H2O), reaction time, molar ratio of the reactants [ CO( NH2) 2 and MgCl2·6H2O ] and reaction temperature. The optimum conditions preparing magnesia nanopowder are as follows: concentration of the reactant: 1.5 mol/L, reaction time 3 h, molar ratio of reactants 5 : 1 and reaction temperature 99 ℃.
出处
《河南化工》
CAS
2006年第7期14-16,共3页
Henan Chemical Industry
关键词
均匀沉淀法
纳米粉体
氧化镁
正交试验
homogeneous precipitation method
nanopowder
magnesia
orthogonal experiment
作者简介
张伟(1975-),男,硕士,从事纳米无机材料制备及应用的研究,电话:(0411)88993916。