摘要：首次在液滴“微反应器”中借用均相沉淀反应的原理 ,即通过水解剂 (草酸二甲酯 )水解出的草酸与液滴中的钡钛离子发生共沉淀反应生成草酸氧钛钡 ,进而煅烧制得钛酸钡粉体。用化学分析方法测定产物中的Ba/Ti物质的量比 ,用XRD、TEM、LS - 2 30粒度仪分别对产物的晶型、形貌及粒度进行表征。结果表明 ,采用该法制备的是组分分布均匀、粒度小且分布窄 ,形貌为球型的纯四方相钛酸钡粉体
关键词：钛酸钡；超细粉体；喷雾反应法；均相沉淀
Abstract：A new process for synthesing barium titanyl oxalate tetrahydrate-spray reaction were proposed on the basis of applying the principle of homogeneous precipitation in the droplets mini-reactor.The Ba/Ti ratio and harmful impurity of BaTiO 3 was analyzed by the methods of chemical analysis and X-fluorescence spectrum.The crystal structure,particle size and morphology of the BaTiO 3 were characterized by XRD,TEM,etc..The results showed that BaTiO 3 powder obtained from the process is in high purity,small particle and narrow size distribution.
Keywords：barium titanate;ultrafine powders;spray reaction;homogenous precipitation
