中文摘要：

选择硝酸钡、乙酸钡、碳酸钡、氢氧化钡与二氧化钛作原料,利用熔盐法,在不同温度,不同保温时间下煅烧制备高纯度的钛酸钡纳米晶。采用XRD、SEM对样品进行表征的基础上,通过模拟初步研究了不同反应原料对钛酸钡晶体合成动力学的影响。结果表明：各组反应物均符合JMAK模型和纯界面模型,说明这两个模型是熔盐法制备钛酸钡的生长动力学的通用模型。此外,硝酸钡、乙酸钡两组还符合自由形核、快速生长模型和收缩球面界面模型,而碳酸钡和氢氧化钡两组则不符合,这可能和反应物分解温度有关,不同的分解温度会影响动力学过程。

英文摘要：

High purity BaTiO3 nanocrystals were synthesized by molten salt method at different temperatures for different holding time,using barium chloride,barium nitrate,barium acetate,barium carbonate,barium hydroxide octahydrate and titanium dioxide as raw materials.The as-prepared samples were characterized by X-ray diffraction and SEM,the possible influence of different raw materials on the phase transformation dynamics were studied.The results show that all groups fit JMAK and pure interface nucleation models very well,which means these two models are the generic growth kinetics in the case of the molten salt method.Ba（ NO3）2 and Ba（ CH3COO）2 groups fit contracting spherical interface and random nucleation and rapid growth models,but the other two groups do not fit.This suggests that different decomposition temperatures of the used precursors might have effects on the synthesis dynamics process.