| 一种铌镁酸铅—钛酸铅晶体的铁电相变研究 |
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| 引用本文： | 张磊,罗豪苏.一种铌镁酸铅—钛酸铅晶体的铁电相变研究[J].压电与声光,1999,21(2):136-139. |
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| 作者姓名： | 张磊 罗豪苏 |
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| 作者单位： | 山东大学物理系，上海硅酸盐研究所 |
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| 摘 要： | 研究了Ｐｂ（Ｍｇ１／３Ｎｂ２／３）Ｏ３－ＰｂＴｉＯ３晶体的介电、热电和压电性质，温度测量范围为７０Ｋ～６００Ｋ。发现它不仅在４７４Ｋ附近有一铁电－顺电相变，而且在１８０Ｋ附近还存在一个铁电－铁电相变。在相变温度区域里，介电、热电和压电都有明显的热滞效应，具有一级相变特性。
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| 关 键 词： | 压电晶体 相变 热滞效应 电容率 热释电性 |
Study of a Phase Transition of Crystal in the PMN PT System |
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| Zhang Lei,Peng Yiping,Zhong Weilie,Zhang Peilin.Study of a Phase Transition of Crystal in the PMN PT System[J].Piezoelectrics & Acoustooptics,1999,21(2):136-139. |
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| Authors: | Zhang Lei Peng Yiping Zhong Weilie Zhang Peilin |
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| Abstract: | The dielectric,pyroelectric and piezoelectric properties of the Pb(Mg 1/3 Nb 2/3 )O PbTiO 3 crystal were studied,in the temperature range from 70 K to 600 K.The measurement shows that a paraelectric ferroelectric transition exists near 474 K,and a ferroelectric ferroelectric transition exists near 180 K.Near the transition temperature,a thermal hysteresis was found in dielectric,pyroelectric and piezoelectric measurements.Thus the transition should be of the first order transition. |
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| Keywords: | piezoelectric crystal phase transition thermal hysteresis permittivity pyroelectricity |
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