铁电陶瓷畴变的原位Raman谱观测  

IN SITU RAMAN SPECTROSCOPY OBSERVATION FOR DOMAIN SWITCHING OF FERROELECTRIC CERAMICS

作　　者：张飒[1] 程璇[2] 张颖[3] 

机构地区：[1]厦门大学化学系,厦门361005 [2]厦门大学化学系固体表面物理化学国家重点实验室,厦门361005 [3]厦门大学材料科学与工程系,厦门361005

出　　处：《金属学报》2005年第6期663-668,共6页Acta Metallurgica Sinica

基　　金：国家自然科学基金资助项目10472098

摘　　要：从Raman光散射原理出发,提出原位Raman谱观测畴变原理,探索建立铁电畴变的原位、无损和微区观测技术.通过对PLZT铁电陶瓷试样的90°原位旋转前、后Raman谱变化的观测,以及电场作用下PLZT铁电陶瓷试样畴变后Raman谱峰强变化的观测,证实可以利用Raman谱的变化来检测铁电陶瓷材料电畴的畴变.In order to develop a nondestructive technique observing domain switchings in microscopic scale, an in situ method was proposed based upon the principal of Raman spectroscopy. Two types of experiments were carried out to verify the proposed method. One is to measure the Raman spectra for a fixed grain in the PLZT ferroelectric sample before and after 90 degrees rotation. The other is to observe variations of Raman spectra for a fixed grain under a DC field. The results revealed that by a 90 degrees rotation the Raman spectra for grains in an in-plane polarized sample vary and the Raman spectra for grains in both un-poled and out-plane polarized samples remain unchanged. The results also indicated that the in situ Raman spectrum varies as the magnitude of the applied DC. field increases. These results showed that the domain switching will leads to variations of Raman spectrum.

关 键 词：铁电陶瓷 畴变 原位观测 RAMAN光谱 

分 类 号：TB321[一般工业技术—材料科学与工程]