PZN-PMN-PT铁电晶体的生长及表征  

Growth and Properties of PZN-PMN-PT Ferroelectric Crystals

作　　者：惠增哲[1] 田瑞英[1] 龙伟[1] 李晓娟[1] 方频阳[1] 

机构地区：[1]西安工业大学陕西省光电功能材料与器件重点实验室,西安710021

出　　处：《西安工业大学学报》2013年第2期134-139,共6页Journal of Xi’an Technological University

基　　金：973计划项目(2013CB632904);国家自然科学基金(51072155);陕西省自然科学基础研究计划重点项目(2010JZ006)

摘　　要：本文采用高温溶液法制备了PZN-PMN-PT晶体,利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)分析了晶体的结构和微观形貌,通过偏光显微镜和介电温谱观测了晶体电畴和介电性能随温度的变化.研究结果表明,采用高温溶液法可以制备出纯钙钛矿相结构的PZN-PMN-PT晶体,晶体颗粒呈淡黄色多面体形态,最大尺寸为4mm×2.5mm×2mm,电畴的消光角为45°,三方四方相变温度达113℃,居里温度高达246℃.PZN-PMN-PT晶体的三方四方相变温度和居里温度均高于PZN-PT和PMN-PT晶体.The PZN-PMN-PT ferroelectric crystal was prepared by the high temperature flux method. The structure and morphology were characterized by X-ray diffraction analysis （XRD） and scanning electron morphology （SEM）. The temperature dependence of domain and dielectric properties was performed by polarization microscope and impedance analyzer. It is indicated that the structure of PZN- PMN-PT crystal was confirmed with pure perovskite structure by the high temperature flux method. The largest size of PZN-PMN-PT crystal is 4mm×2.5mm×2MM. The extinction angle of domain was 45°. The higher Rhombohedral-tetragonal phase transition temperature and Curie temperature for PZN- PMN-PT crystal were found to be at 113 ℃ and 246 ℃ compared with that of PZN-PT and PMN-PT crystals, respectively.

关 键 词：PZN-PMN—PT晶体 高温溶液法 相结构 电畴 居里温度 

分 类 号：O782[理学—晶体学]