原位Raman光谱技术研究PLZT铁电陶瓷相变

doi:10.3724/SP.J.1077.2014.13374

无机材料学报 ›› 2014, Vol. 29 ›› Issue (4): 399-404.DOI: 10.3724/SP.J.1077.2014.13374 CSTR: 32189.14.SP.J.1077.2014.13374

原位Raman光谱技术研究PLZT铁电陶瓷相变

张飒^1,2, 刘莹¹, 刘怡萱¹, 程旋^1,2, 张颖^1,2

(1. 厦门大学材料学院材料科学与工程系, 厦门 361005; 2.?福建省特种先进材料重点实验室, 厦门361005)

收稿日期:2013-07-18 修回日期:2013-09-06 出版日期:2014-04-20 网络出版日期:2014-03-24
基金资助:
国家自然科学基金(51302236); 福建省特种先进材料重点实验室基金(2006L2003)

Phase Transitions in PLZT Ceramics Observed by In-situ Raman Spectroscopy

ZHANG Sa^1,2, LIU Ying¹, LIU Yi-Xuan¹, CHENG Xuan^1,2, ZHANG Ying^1,2

(1. College of Materials, Department of Materials Science and Engineering, Xiamen University, Xiamen 361005, China; 2. Fujian Provincial Key Laboratory of Advanced Materials, Xiamen University, Xiamen 361005, China)

Received:2013-07-18 Revised:2013-09-06 Published:2014-04-20 Online:2014-03-24
Supported by:
National Natural Science Foundation of China (51302236); Fujian?Provincial?Key?Laboratory of Advanced Materials (2006L2003)

摘要/Abstract

摘要： 采用传统固相反应法制备了原子比Zr/Ti≈52/48, 掺杂少量镧的锆钛酸铅(PLZT)铁电陶瓷材料, X射线衍射分析表明得到的陶瓷粉末样品为纯钙钛矿相。对PLZT铁电陶瓷材料进行不同温度下的原位Raman谱观测, 得到了各Raman特征谱的频率和峰强随温度的变化规律。结果表明, 从-200℃升温至600℃过程中, 准同型相界附近的PLZT铁电陶瓷分别发生了两种相变: 在0℃发生了单斜相到四方相的转变, 而在350℃发生了四方相到立方相的转变; 并且, 在-150℃和250℃附近还可能分别发生低温单斜相到高温单斜相和混合相的相变。

关键词: PLZT铁电陶瓷, 相变, 准同型相界, 原位Raman光谱

Abstract: The PLZT ceramics (atomic ratio Zr/Ti≈52/48, doped with small amounts of La) were prepared by conventional solid state reaction technique and identified to be pure perovskite phase by XRD. To observe the phase transition in the PLZT ceramics, the in-situ Raman spectra were measured at different temperatures. Accordingly, the variations of characteristic Raman shifts and intensities of the modes with temperatures were obtained. It is confirmed that two types of phase transitions near morphotropic phase boundary (MPB) occurred at 0℃ from rhombohedral to tetragonal and at 350℃ from tetragonal to cubic, in the temperature range from -200℃ to 600℃. What’s more, the phase transitions for rhombohedral from low. to high-temperature phases and mixed phases may take place near -150℃ and 250℃, respectively.

Key words: PLZT ferroelectric ceramics, phase transition, near morphotropic phase boundary, in-situ Raman spectroscopy

中图分类号:

TB321

张飒, 刘莹, 刘怡萱, 程旋, 张颖. 原位Raman光谱技术研究PLZT铁电陶瓷相变[J]. 无机材料学报, 2014, 29(4): 399-404.

ZHANG Sa, LIU Ying, LIU Yi-Xuan, CHENG Xuan, ZHANG Ying. Phase Transitions in PLZT Ceramics Observed by In-situ Raman Spectroscopy[J]. Journal of Inorganic Materials, 2014, 29(4): 399-404.

参考文献

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原位Raman光谱技术研究PLZT铁电陶瓷相变

Phase Transitions in PLZT Ceramics Observed by In-situ Raman Spectroscopy

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