PZTS系凝胶玻璃及玻璃陶瓷的结构研究

采用溶胶凝胶工艺在低温下合成均匀透明的ＰＺＴＳ新型多组元凝胶玻璃，并在凝胶玻璃中成功地析出ＰｂＴｉＯ３，Ｐｂ（Ｚｒ，Ｔｉ）Ｏ３纳米微晶。利用ＩＲ谱分析了凝胶玻璃中Ｓｉ－Ｏ－Ｓｉ，Ｓｉ－Ｏ－Ｔｉ等化学键在成胶过程中的形成以及在热处理过程中的变化，根据Ｋｉｓｓｉｎｇｅｒ原理估算了ＰＴＳ凝胶玻璃的析晶活化能。借助ＸＲＤ较系统地研究了凝胶玻璃在高温下的结晶结构。探讨了在ＰＺＳ、ＰＺＴＳ体系中ＺｒＯ２和Ｓｉ

Study on the Structures of Gel Glass and Glass Ceramic of PZTS System

Homogeneous and transparent multicomponent gel glass,of PZTS system was synthesized at moderate temperature by sol gel method,and PbTiO_3,Pb(Ti,Zr)O_3 nanocrystallites were successfully grown from the gel glass. According to the analysis of IR spectra,it was thought that Si O Si,Si O Ti bohds were formed in the gelling process,and Si O Zr bonds might also be formed.Si O Si bonds were enhanced where as Si O Ti,Si O Zr bonds disappeared at higher temperatures. The crystallization kinetics of PTS gel glass was analysed by Kissinger method,the crystallization index and the apparent activiation energy were calctilated.Crye-talline structures of the PZTS system at elevated temperature were studied by XRD,The prevention to the for-mation of composite Pb,Zr,Ti perovskite cyrstal structures in PZTS system caused by the crystallization of ZrO_2and SiO_2 was discussed, The crystalline morphology of the material was observed by SEM.