玻璃陶瓷Ba_2TiSi_2O_8的制备研究

Preparation of Ba_2TiSi_2O_8 Glass-ceramics

Ba2TiSi2O8(BTS)玻璃陶瓷具有压电性、热释电性和非线性光学性能。采用溶胶凝胶法制备了BTS玻璃陶瓷,利用差热分析仪(DTA)分析了BTS干凝胶在煅烧过程中的化学反应及能量变化;X射线衍射仪(XRD)研究了BTS粉体的物相组成;激光粒度仪分析了BTS粉体的颗粒度;扫描电子显微镜(SEM)表征了BTS玻璃陶瓷样品断面的微观结构。研究结果表明:合成BTS粉体的最佳温度为850℃,所得颗粒的平均粒径为1.73μm。1250℃烧结制得的BTS玻璃陶瓷表现出致密、孔少、均匀的外观性质。

Ba2 TiSi2 08 （BTS） glass-ceramics have the excellent properties such as piezoelectricity, pyro-electricity, and nonlinear optical properties. BTS glass-ceramics were prepared by sol-gel method. The chemical reactions and energy changes of BTS dry-gel were analyzed by Differential Thermal Analyzer （DTA）. The phase composition of BTS powders were tested by X-ray diffraction （XRD）. The particle size of BTS powders was measured by laser particle size analyzer. The microstructure of BTS glass-ceramics samples was characterized by Scanning Electron Microscope （SEM）. The results showed that the suitable temperature of BTS powders synthesis was 850℃, and the average size of BTS powders was 1.73μm. The BTS glass-ceramics sintered at 1250℃ have the properties of densifi- cation, low porosity and uniformity.