| 弛豫铁电体结构起伏与弛豫性研究 |
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| 引用本文： | 张栋杰,姚熹. 弛豫铁电体结构起伏与弛豫性研究[J]. 化学学报, 2005, 63(12): 1095-1099 |
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| 作者姓名： | 张栋杰 姚熹 |
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| 作者单位： | (1南京师范大学材料科学重点实验室 南京 210097)(2西安交通大学电子材料与元器件研究所 西安 710049) |
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| 基金项目： | 江苏高校自然科学研究计划(No.03KJB430068)资助项目. |
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| 摘 要： | 制备了铅基弛豫铁电体0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3和Pb(Zn1/3Nb2/3)O3基陶瓷. 铅基弛豫铁电体PMNT, PZN基陶瓷弛豫过程可用局域冻结模型描述. 在微畴-宏畴转变过程中, 弛豫铁电体产生结构起伏; 在相同的频率条件下, 弛豫铁电体的结构起伏程度越大, 弛豫程度越低. 在微畴-宏畴转变过程中, 随微畴的增大, 弛豫铁电体的弛豫特性减弱或消失.
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| 关 键 词： | 铁电体 弛豫 结构 畴 |
| 收稿时间： | 2004-07-01 |
| 修稿时间： | 2005-02-21 |
Structural Fluctuation and Relaxation of Perovskite Relaxor Ferroelectrics |
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| ZHANG Dong-jie,YAO Xi. Structural Fluctuation and Relaxation of Perovskite Relaxor Ferroelectrics[J]. Acta Chimica Sinica, 2005, 63(12): 1095-1099 |
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| Authors: | ZHANG Dong-jie YAO Xi |
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| Affiliation: | (1 Laboratory of Materials Science, Nanjing Normal University, Nanjing 210097)(2 Electronic Materials Research Laboratory, Xi′an Jiaotong University, Xi′an 710049) |
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| Abstract: | The Pb-based complex perovskite relaxor ferroelectrics (RFE) of PMN and PZN ceramics were prepared. The microdomain-macrodomain transition of relaxor ferroelectrics was investigated by conven- tional method deeply by using amending local freezing glass-model. The structural fluctuation has taken place in RFE during the microdomain-macrodomain transition. The larger the structural fluctuation of RFE was, the lower the relaxation degree was in the same frequency condition. The relaxation degree was dimi- nished or even vanished when the microdomain became larger. |
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| Keywords: | ferroelectrics relaxor structure domain |
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