| 退火处理对PMN弛豫铁电体B位有序性研究 |
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| 引用本文： | 李新元,冯楚德,李承恩,庄志诚.退火处理对PMN弛豫铁电体B位有序性研究[J].无机材料学报,1999,14(4):699-704. |
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| 作者姓名： | 李新元 冯楚德 李承恩 庄志诚 |
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| 作者单位： | 中国科学院上海硅酸盐研究所 上海 200050; 上海交通大学 上海 200030 |
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| 摘 要： | 本文采用退火热处理方法， 利用高分辨透射电镜（ Ｈ Ｒ Ｅ Ｍ） 、选区电子衍射（ Ｓ Ａ Ｅ Ｄ） 、 Ｒａｍａｎ 光谱等技术对 Ｐ Ｍ Ｎ 中 Ｂ 位离子有序 无序结构与微区化学组成的关系进行分析研究表明， 退火热处理有助于 Ｂ 位离子有序化； 并且 Ｂ 位离子的有序排列是产生局部化学组成不均匀性的原因.
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| 关 键 词： | 弛豫铁电体 有序-无序结构 化学键 |
| 收稿时间： | 1998-8-13 |
| 修稿时间： | 1998-10-22 |
Effect of Heat Treatment on B site Ordering of Lead Magnesium Niobate Ferroelectric Ceramics |
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| LI Xin-Yuan,FENG Chu-De,LI Cheng-En,ZHUANG Zhi-Cheng.Effect of Heat Treatment on B site Ordering of Lead Magnesium Niobate Ferroelectric Ceramics[J].Journal of Inorganic Materials,1999,14(4):699-704. |
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| Authors: | LI Xin-Yuan FENG Chu-De LI Cheng-En ZHUANG Zhi-Cheng |
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| Affiliation: | Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China; Shanghai Jiaotong University Shanghai 200030 China |
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| Abstract: | The mechanism of B site ordering and disordering in Lead Magnesium Niobate (PMN) was examined by heat treatment at different annealing time The B-site structural ordering characteristics were exposed by selected area electron diffraction (SAED) and high resolution electron microscopy (HREM) By analyzing the different types of chemical bonds in the BO6 network by the Raman spectroscopy, it was demonstrated that ordered domains in PMN are Mg rich region while disordered domains are Mg poor (or Nb-rich). |
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| Keywords: | relaxor ferroelectrics order disorder structure chemical bond |
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