| Pb(Sc_(1/2)Nb_(1/2))O_3中有序-无序转变和铁电相变的Raman光谱研究 |
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| 引用本文： | 陈川,朱满康,张卫红,宋雪梅,陈建,侯育冬,严辉. Pb(Sc_(1/2)Nb_(1/2))O_3中有序-无序转变和铁电相变的Raman光谱研究[J]. 光散射学报, 2008, 20(3) |
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| 作者姓名： | 陈川 朱满康 张卫红 宋雪梅 陈建 侯育冬 严辉 |
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| 作者单位： | 1. 北京工业大学材料学院,北京,100124
2. 中山大学测试中心,广州,510275 |
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| 基金项目： | 国家自然科学基金，北京市教委科技发展计划项目 |
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| 摘 要： | 采用wolframite前驱物法制备了Pb(Sc1/2Nb1/2)O3陶瓷。通过调节陶瓷烧结工艺,获得了三种具有不同B位离子有序度的PSN陶瓷。测量了三种陶瓷样品在室温至160°C范围内的Raman光谱随温度变化。结果表明,随着温度的升高,三种不同B位有序度的陶瓷样品中,Raman光谱中位于530 cm-1的F2g模的峰位和半峰宽分别在100°C,85°C和80°C发生了突变,表明陶瓷分别在100°C,85°C和80°C三个温度点发生了铁电-顺电相变。上述结论得到了介电温度谱测量数据的支持。
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| 关 键 词： | Pb(Sc1/2Nb1/2)O3陶瓷 铁电相变 有序无序相变 Raman光谱 |
Order-disorder Transition and Phase Transition in Pb(Sc1/2Nb1/2)O3 Ceramics Investigated by Raman Spectra |
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| CHEN Chuan,ZHU Man-kang,ZHANG Wei-hong,SONG Xue-mei,CHEN Jian,HOU Yu-dong,YAN Hui. Order-disorder Transition and Phase Transition in Pb(Sc1/2Nb1/2)O3 Ceramics Investigated by Raman Spectra[J]. Chinese Journal of Light Scattering, 2008, 20(3) |
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| Authors: | CHEN Chuan ZHU Man-kang ZHANG Wei-hong SONG Xue-mei CHEN Jian HOU Yu-dong YAN Hui |
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| Abstract: | A wolframite precursor method was used to prepare the Pb(Sc1/2Nb1/2)O3 ceramic.Three different Pb(Sc1/2Nb1/2)O3 ceramic samples characterized with varied chemical ordering on the B site ions were produced by modifying the annealing treatment.Raman spectra of three different samples are measured from room temperature to 160°C.A ferroelelctric-paraelectric phase transition was observed for three ceramic samples at about 100°C,85°C and 80°C,respectively.This conclusion is supported by the dielectric measurement of these ceramic samples. |
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| Keywords: | Pb(Sc1/2Nb1/2)O3 ceramics Ferroelectric Transition Order-Disorder Transition Raman Spectrum |
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