流延成型中钛酸钡纳米粉体滑移优化

摘要

Dispersion of barium titanate nano powder with average particle size of 30 nm in different solvent sys-tems of tape casting (toluene-ethanol,methyl ethyl ketone-ethanol,xylene-ethanol) along with Triton x-100 or phosphate ester as dispersants has been studied using sedimentation experiments.The influence of different pa-rameters such as type of solvent system,dispersant and concentration of dispersant on BaTiO3 slip dispersion, viscosity and the properties of green tape were studied.The optimal concentration of dispersant was determined from the minimum slip viscosity.Xylene-ethanol with phosphate ester was found to be the best solvent and dis-persant system for tape casting.Defect free,dense and smooth green tapes are formed with this system.%在流延成型中不同的溶剂系统(甲苯-乙醇、甲基乙基酮-乙醇、二甲苯-乙醇)中离散的钛酸钡纳米粉体粒子的平均直径30 nm左右,溶液中同时伴有作为离散剂的Triton x-100或者磷酸盐酯,通过沉淀实验研究.研究不同参数的影响(如溶剂系统类型,关于钛酸钡滑移离散的离散剂和离散剂浓度,绿色带的粘度和性能).离散的最佳浓度是由最低滑移浓度决定.发现以磷酸酯为离散剂的二甲苯-乙醇是流延成型最好的溶剂和离散系统.无瑕疵、致密、光滑的绿色带材由这种系统形成.