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首页> 外文期刊>Materials Letters >Composition dependence of piezoelectric constant and dielectric constant tunability in the <001>-oriented Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 single crystals
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Composition dependence of piezoelectric constant and dielectric constant tunability in the <001>-oriented Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 single crystals

机译：<001>取向Pb（Mg_（1/3）Nb_（2/3））O_3-PbTiO_3单晶中压电常数和介电常数可调谐性的组成依赖性

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摘要

Composition dependence of room temperature piezoelectric constant d_(33) and dielectric constant tunability was investigated in the <001>-poled single crystals of (1-x)Pb(Mg_(1/3)Nb_(2/3))O_3-xPbTiO_3 with x varying from 0.24 to 0.38. Temperature, frequency and composition dependence of the dielectric constant in the unpoled crystals shows that the critical composition for the relaxor state lies in the 0.69Pb(Mg_(1/3)Nb_(2/3))O_3-0.31PbTiO_3 crystal. It has also the largest piezoelectric constant d_(33) of 2210 pC/N and highest dielectric constant tunability of 40.6 percent (at a dc bias of 1000 V/mm). The experiment results validate the prediction that the relaxor-based materials with the critical composition for the relaxor state will have the highest piezoelectric susceptibility.
机译：在（1-x）Pb（Mg_（1/3）Nb_（2/3））O_3-xPbTiO_3的<001>极化单晶中研究了室温压电常数d_（33）的成分依赖性和介电常数可调谐性x从0.24到0.38不等。非极化晶体中介电常数的温度，频率和成分依赖性表明，弛豫态的关键成分位于0.69Pb（Mg_（1/3）Nb_（2/3））O_3-0.31PbTiO_3晶体中。它还具有2210 pC / N的最大压电常数d_（33）和40.6％的最高介电常数可调性（在1000 V / mm的直流偏置下）。实验结果验证了具有弛豫状态关键组成的弛豫基材料将具有最高压电磁化率的预测。

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