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采用水/OP-10/正己醇/环己烷微乳液体系,以Ba(OH)2.8H2O和钛酸四丁酯为反应起始物,常压下,低温一步制备BaTiO3纳米粉体。研究了反应温度、表面活性剂浓度、反应物浓度及ω值等参数对产物的影响。结果表明:该方法制备出的BaTiO3纳米粉体粒径较小,具有较好的分散度;65℃为微乳体系制备BaTiO3纳米粉体的最佳温度;晶粒平均大小通过测定XRD-衍射线宽化效应,利用谢乐公式进行计算,结果表明ω值对粒径的大小有决定性影响,当体系ω值为11时,平均粒径为18 nm左右,当ω值增大至17时,产物的平均粒径增大至35 nm左右;拉曼分析表明样品中存在四方相结构。
The BaTiO3 nanopowder was prepared by using water / OP-10 / n-hexanol / cyclohexane microemulsion system with Ba (OH) 2.8H2O and tetrabutyl titanate as starting materials. The effects of reaction temperature, surfactant concentration, reactant concentration and ω value on the product were studied. The results show that the BaTiO3 nanopowder prepared by this method has small particle size and good dispersity. The optimal temperature for preparing BaTiO3 nanopowder is 65 ℃. The average grain size is determined by XRD, Widening effect, the use of Xie formula to calculate, the results show that the value of ω on the size of the particle size has a decisive impact, when the system ω value of 11, the average particle size of about 18 nm, when the ω value increases to 17, the product The average particle size increased to about 35 nm; Raman analysis showed that the sample has a tetragonal phase structure.