应力场下PZT铁电陶瓷的原位拉曼光谱测试  

In-situ Raman measurements of PZT under a stress field

作　　者：庄清洋 程璇[1,2] 张飒[1,2] 张颖[1,2] 

机构地区：[1]厦门大学材料学院材料科学与工程系,福建厦门361005 [2]福建省特种先进材料重点实验室,福建厦门361005

出　　处：《功能材料》2014年第4期100-103,共4页Journal of Functional Materials

基　　金：福建省特种先进材料重点实验室基金资助项目(2006L2003)

摘　　要：采用传统固相法得到了晶粒分布均匀，平均晶粒尺寸2～3μm、四方相结构的Pb（Zr0.52Ti0.48）O3多晶陶瓷。利用四点弯曲应力加载装置，开展了单个晶粒定点和多个单晶粒连续定点的原位拉曼测试。计算了不同应力场下低波速拉曼光学模的相对强度比值（IE（ILO）／IE（2TO））和IE＋B1／IE（2TO）。结果表明，IE（1LO）／IE（2TO）和IE＋B1／IE（2TO）峰强比均随外加应力绝对值的增加而减小，而随应力作用时间而增大。IEL（ILO）／IE（2TO）和IE＋B1／IE（2TO）随不同晶粒所受的应力变化而变化，但拉曼光谱的峰位未发生变化。Polycrystalline Pb（Zr0.52Ti0.48）O3 ceramics in tetragonal phase with an average size 2-3 μm of uni- formly distributed grains were prepared through a conventional solid state route. In-situ Raman measurements on individual single grain and multiple single grains in subsequence were carried out under a stress field by em- ploying four-point bending loads. The relative intensity ratios of optical modes at low Raman shifts （IE（ILO）/ IE（2TO） and IE＋B1/IE（2TO） under different applied stresses were calculated. The results revealed that the values of （IE（ILO）/ IE（2TO） and IE＋B1/IE（2TO） decreased with the increases in the magnitude of applied stresses, while in- creased with the applying time. The values of （IE（ILO）/ IE（2TO） and IE＋B1/IE（2TO） varied with the alterations of applied stresses on different single grains. However, the peak positions of Raman spectra remained unchanged.

关 键 词：锆钛酸铅 原位拉曼 四点弯 

分 类 号：TQ164[化学工程—高温制品工业]