不同温度下钛酸钡陶瓷体的X射线衍射技术研究

摘要

Under different temperatures, the domestic X-ray diffractometcr equipped with a low-temperature camera was first adopted to study the X-ray diffraction （XRD） technique of BaTiO3 ceramic bulk. The results indicate that the crystal structure of BaTiO3 ceramic shows a tetragonal symmetry from 30 to 130 ℃, subsequently enters a cubic region above 130 ℃ and the unit cell volume increases linearly with temperature. As compared with the powder XRD data from abroad, the accuracy and stability of the domestic XRD technique was tested and verified.%在不同温度下,首次采用国产X射线衍射（XRD）仪及配套低温附件对BaTiO3陶瓷体进行XRD测试技术研究.结果表明：从30到130℃温度范围内,BaTiO3陶瓷体的晶体结构显示四方对称性;高于130℃,进入立方区域,BaTiO3陶瓷的单胞体积随温度线性增加.同国外的粉末数据比较,验证了国产XRD技术的准确性和稳定性.