钛酸钡粉体的微波水热合成

MICROWAVE ASSISTED HYDROTHERMAL SYNTHESIS OF BARIUM TITANATE NANO-POWDERS

结合水热法和微波加热的优点,采用微波水热在低温条件下合成了钙钛矿结构的钛酸钡纳米粉体,并与水热法合成产物进行了适当的比较。通过X射线衍射(XRD)、红外光谱(IR)和SEM电镜,分析了BaTiO_3纳米粉体的结构和组成,并初步探讨了微波水热合成钛酸钡的机理。结果表明,与传统水热法比较,微波水热合成BaTiO_3纳米粉的温度更低,而且微波加热可明显提高反应速度。

The advantages of microwave heating and hydrothermal processes were integrated, and microwave heating was introduced to the hydrothermal process enabling perovskite-typed BaTiO3 nano- powders to be synthesized at low temperatures conditions. Comparisons were made between powders synthesized of the BaTiO3 powders which were studied by XRD, SEM and IR, and the mechanism of microwave assisted hydrothermal were considered. Compared with BaTiO3 powders by hydrothermal process, BaTiO3 nano-powders can be synthesized at lower temperature by microwave assisted hydrothermal process. Microwave heating can improve the rate of reaction.