摘要
采用溶胶-凝胶自蔓燃法合成具有单一钙钛矿相的0.76Na0.5Bi0.5TiO3-0.24SrTiO3(简写为NBT-ST)的超细粉体。采用热重/差热、X射线粉末衍射、红外光谱等分析手段对自蔓燃工艺前后的粉体进行了分析表征,通过对合成工艺中溶胶pH值、水浴温度、柠檬酸与硝酸根离子配比、热处理温度等参数的优化,获得了制备单一钙钛矿结构的NBT-ST无铅压电材料超细粉体的最优工艺参数:溶胶pH值为8、水浴温度为80℃、柠檬酸与硝酸根离子配比为1.25∶1,185℃左右凝胶发生自蔓燃,热处理温度为550℃,保温时间为1 h。
Abstract ：0.76Na0.5 Bi0.5 TiO3-0.24SrTiO3 （ abbr. as NBT-ST） ultra_fine powders with a pure perovskite phase were synthesized by sol-gel combustion method. The powders before and after combustion were characterized by thermogravimetric （TG）, differential thermal analysis（ DTA）, X-ray powder diffraction（XRD） and Infrared spectroscopy （IR）. The process parameters, like pH value of the solution, heating temperature, mole ratio of citric acid to nitrates, calcination temperature, were improved to obtain the optimum process parameters. NBT-ST powders with a pure perovskite phase were synthesized by process of pH -- 8, combustion at about 185℃, bath temperature at 80℃, n （ citric acid）/n （nitrates） = 1.25： 1, and calcinated at 550℃ for 1 h.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2011年第6期1504-1509,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(51072162)
陕西省工业攻关项目(2010K09-18)
关键词
钛酸铋钠
钛酸锶
钙钛矿相
溶胶-凝胶自蔓燃法
bismuth sodium titanate
strontium titanate
perovskite phase
sol-gel combustion method
