【摘要】 采用硬脂酸钡和钛酸丁酯为原料的凝胶方法制备了纳米晶钛酸钡粉。ＸＲＤ分析表明晶体为立方相钙钛矿结构，扫描电镜图像显示一次粒子粒径约２０ｎｍ。纳米粉体烧结温度比普通微米粉体烧结温度低，陶瓷显微结构分析表明在陶瓷中晶粒仍保持纳米尺寸，约为１００ｎｍ。所得材料具有良好的热稳定性，在１１９０～１２８０℃的烧结温度范围内，陶瓷体内晶粒无明显长大，且始终维持在纳米尺寸。更多还原

【Abstract】 The nano-crystalline BaTiO3 powder are prepared by gel method using tetrabutyl titanate and barium stearate.It is indicating that the nano-crystalline has cubic phase structure by XRD analysis and the first grade grain size is about 20 urn. Sintering temperature of the nano-powder is Jower than the common micron powder. The micro-structure analysis of the ceramic made by nano-powder shows the grain size is also maintained nano-scale, about 100 um. The ceramic material has good thermal stability and the grain size was maintained at nano-scale when the sintering temperature raised from 1 190℃ to 1280℃．更多还原