钛酸钡的制备研究进展

Progress on Preparation of Barium Titanate Powder

对铁酸钡粉末的制备方法进行了综述。传统的高温固相合成法已不能满足电子技术微型化和集成化发展对钛酸钡粉体提出的超细、高纯、单分散要求。从制备成本和操作过程来看,经过改进的共沉淀法、草酸盐法和水热法是制备高纯、亚微米级钛酸钡粉末的重要方法,在大规模生产中有较好的应用前景。在水热过程中,通过选择适当的钛源和水热条件,可以制备出高纯、单分散的亚微米级及纳米级钛酸钡粉体。低温直接合成法因其原料易得,过程简单,是一种在大规模生产上较有应用前景的制备纳米钛酸钡的方法。

The methods for the preparation of barium titanate powders were reviewed in this paper.The traditional high temperature solid phase reaction process can not meet the technological requirement of high purity,ultra-fine.uniform particle size distribution and monodispersed powders put forward by the miniaturization and integration of electronic industry.From the view point of production cost and operation process,modified coprecipitation method,oxalate method and hydrothermal method are important methods for the preparation of high-purity,submicronmeter BaTiO3 powder,and have great potential in large-scale production.High-purity,monodispersed,submicrometer or nanometer sized BaTiO3 powders can be obtained by choosing suitable Ti source and controlling hydrothermal parameters.Low-temperature direct synthesis method is a new potential method for the large scale preparation of nanometer sized BaTiO3 powder because of the easily available raw materials and simple operation process.