Crystal growth and ferroelectric related properties of (1-x)Pb(A/sub 1/3/Nb/sub 2/3/)O/sub 3/-xPbTiO/sub 3/ (A=Zn/sup 2+/, Mg/sup 2+/)

ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI:10.1109/ISAF.1996.602714

Seung-Eek Park, M. Mulvihill, P. Lopath, M. Zipparo, T. Shrout

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引用次数: 11

Abstract

Crystals of (1-x)Pb(A/sub 1/3/Nb/sub 2/3/)O/sub 3/-xPbTiO/sub 3/ (A=Zn/sup 2+/, Mg/sup 2+/) were grown by the flux technique. The dielectric and piezoelectric properties as a function of composition and crystal orientation have been evaluated. Both MPB and non-MPB crystals were found to possess high piezoelectric properties. Values of longitudinal electromechanical coupling coefficients (k/sub 33/)>90%, dielectric constants ranging from 3000 to 5000 with low dielectric loss <1% were observed for rhombohedral crystals. Tetragonal crystals with increased PbTiO/sub 3/ content exhibited large thickness coupling coefficients (k/sub T/)>63% with relatively low dielectric constant (/spl sim/1000). Ultrahigh values of piezoelectric coefficients (d/sub 33/)>2000 pC/N were also measured for non-MPB crystals and confirmed by direct E-field strain measurements. These properties are briefly discussed in relation to device performance.

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(1-x)Pb(A/sub 1/3/Nb/sub 2/3/)O/sub 3/-xPbTiO/sub 3/ (A=Zn/sup 2+/， Mg/sup 2+/)的晶体生长及铁电相关性质

用助熔剂法制备了(1-x)Pb(A/sub 1/3/Nb/sub 2/3/)O/sub 3/-xPbTiO/sub 3/ (A=Zn/sup 2+/， Mg/sup 2+/)晶体。电介质和压电性能作为组成和晶体取向的函数进行了评估。发现MPB和非MPB晶体均具有较高的压电性能。纵向机电耦合系数(k/sub 33/)值为> ~ 90%，介电常数在3000 ~ 5000之间，介电损耗低63%，介电常数相对较低(/spl sim/1000)。在非mpb晶体中也测量到了超高的压电系数(d/sub 33/)>2000 pC/N，并通过直接电场应变测量得到了证实。我们将简要讨论这些属性与器件性能的关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics

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