改进草酸盐共沉淀法制备钛酸钡超细粉体的研究

Preparation of Square Crystalloid Nano-size Barium Titanate Powder by Improved Oxalate Coprecipitation Method

根据传统的草酸盐共沉淀法合成超细BaTiO3粉末易产生偏离四方相的特点,提出了一种改进的草酸盐共沉淀法制备BaTiO3粉体的方法。利用改进的草酸盐共沉淀法在700℃制备出了各向同性的四方相纳米尺寸的BaTiO3粉体,煅烧温度比常规的草酸盐共沉淀法降低了100℃左右;粉体平均粒径约30nm,颗粒均匀,且制备出的粉体具有良好的热稳定性。

Square crystalloid nano-size barium titanate powders were prepared by an improved oxalate coprecipitation method, since the phase would go far away the square crystalloid when the powders＇ size was reduced by traditional technics. Square crystalloid nano-size barium titanate powder can be obtained after being calcined at 700℃ by the improved oxalate coprecipitation method; the calcining temperature would be lower about 100℃ than the routine oxalate coprecipitation method. Average size of the powder is about 30nm with equality dimension and the powders have thermal stability.