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

被引：1

作者：

Zhang Sa ^{[1
,2
]}

Liu Ying ^{[1
]}

Liu Yi-Xuan ^{[1
]}

Cheng Xuan ^{[1
,2
]}

Zhang Ying ^{[1
,2
]}

机构：

[1] Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Fujian Prov Key Lab Adv Mat, Xiamen 361005, Peoples R China

来源：

JOURNAL OF INORGANIC MATERIALS | 2014年 / 29卷 / 04期

基金：

中国国家自然科学基金;

关键词：

PLZT ferroelectric ceramics; phase transition; near morphotropic phase boundary; in-situ Raman spectroscopy; BOUNDARY; COEXISTENCE;

D O I：

10.3724/SP.J.1077.2014.13374

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The PLZT ceramics (atomic ratio Zr/Ti approximate to 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 degrees C from rhombohedral to tetragonal and at 350 degrees C from tetragonal to cubic, in the temperature range from -200 degrees C to 600 degrees C. What's more, the phase transitions for rhombohedral from low, to high-temperature phases and mixed phases may take place near -150 degrees C and 250 degrees C, respectively.

引用

页码：399 / 404

页数：6

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