| 掺钛铌镁酸铅铁电体的自发和场诱导相变 |
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| 引用本文： | 樊慧庆,张良莹.掺钛铌镁酸铅铁电体的自发和场诱导相变[J].材料研究学报,1999,13(3):267-272. |
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| 作者姓名： | 樊慧庆 张良莹 |
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| 作者单位： | 西安交通大学凝固技术国家重点实验室!西安市，710072，西安交通大学，西安交通大学 |
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| 基金项目： | 国家自然科学基金!59232042 |
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| 摘 要： | 测试了掺钛铌镁酸铅系列铁电陶瓷介电和热释电温度梯，观察到自发和场诱导正常铁电体－驰豫型铁电体－顺电体相互转变的现象，在分析这一相变的特点和相应结构特征的基础上，提出了驰豫型铁电体钠米极性微区的动态结构模模型。
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| 关 键 词： | 铁电陶瓷 热电温谱 介电谱 相变 铌镁酸铅 |
SPONtANEOUS AND FIELD-INDUCED PHASE TRANSITION IN Ti DOPED Ph(Mg_(1/3)Nb_(2/3))O_3 FERROELECTRICS |
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| FAN Huiqing, ZHANG Liangying, YAO Xi.SPONtANEOUS AND FIELD-INDUCED PHASE TRANSITION IN Ti DOPED Ph(Mg_(1/3)Nb_(2/3))O_3 FERROELECTRICS[J].Chinese Journal of Materials Research,1999,13(3):267-272. |
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| Authors: | FAN Huiqing ZHANG Liangying YAO Xi |
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| Abstract: | Dielectric response and Pyroelectric current as a function of temperature for Ph (Mg_(1/3)Nb_(2/3))1-xTixO3 (x = 0, 0.1, 0.2, 0.4. designated as PMNT(1-x)/x) ferroelectric ceramics were carefully measured. Spontaneous and field-induced normal ferroelectric-relaxor ferroelectricparaelectric phase transition can be observed clearly. Based on the structural characteristics of this perovskite ferroelectric system, a dynamic structural model for polar nano-microregions (PNMR) was proposed. Using Vogel-Fulcher relation, the temperature at the dielectric permittivity maximum and the frequency can be fitted very well. |
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| Keywords: | ferroelectric ceramics dielectric and pyroelectric response phase transition polar nano-microregion |
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