Synthesis, phase segregation and properties of piezo-/ferroelectric (1-x)Pb(Sc1/2Nb1/2)O3-xPbTiO3 single crystals
Synthesis, phase segregation and properties of piezo-/ferroelectric (1-x)Pb(Sc1/2Nb1/2)O3-xPbTiO3 single crystals
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DOI：
10.1016/j.jcrysgro.2005.11.024
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发表时间：
2006-01-25
影响因子：
1.8
通讯作者：
Ye, ZG
中科院分区：
文献类型：
--
作者：
Bing, YH;Ye, ZG
采用高温溶液法，以PbO为助熔剂，添加B2 O3，合成了（1-x）Pb（Sc 1/2Nb 1/2）O3-xPbTiO（3）[PSN-PT]固溶体单晶。生长的PSN PT单晶含有低于标称组成（x = 0.425 - 0.51）的Ti浓度。固溶体的有效相分离系数k = 0.73。基于这种偏析趋势，成功地生长出了准同型相界（MPB）区成分的PSN-PT晶体。MPB晶体显示出良好的介电和铁电性能，在T-C = 213 ℃时的最大介电常数为60，000（在1 kHz），在室温下的剩余极化为25 μ C/cm（2）。预极化晶体的机电耦合系数k（33）达到78%。PSN-PT晶体的T-C和T-MPB比Pb（Mg_（1/3）Nb_（2/3））O_3（PMN）-PT和Pb（Zn_（1/3）Nb_（2/3））O_3（PZN）-PT晶体的T-C和T-MPB高得多，使它们成为非常有意义的高T-C和高性能压电材料。(c)2005 Elsevier B. V.保留所有权利。
Single crystals of the (1-x)Pb(Sc1/2Nb1/2)O-3-xPbTiO(3) [PSN-PT] solid solution are synthesized by the high-temperature solution method using PbO flux with B2O3 additive. The grown PSN PT single crystals contain a Ti concentration lower than the nominal composition (x = 0.425 - 0.51). The effective phase segregation coefficient is found to be k = 0.73 for the solid solution. Based on the segregation trend, the PSN-PT crystals of compositions within the morphotropic phase boundary (MPB) region are successfully grown. The MPB crystals show good dielectric and ferroelectric properties with a maximum dielectric constant of 60,000 (at 1 kHz) at T-C = 213 degrees C and a remnant polarization of 25 mu C/cm(2) at room temperature. The electromechanical coupling factor k(33) of the pre-poled crystals reaches 78%. The T-C and T-MPB the PSN-PT crystals are much higher than those of the Pb(Mg1/3Nb2/3)O-3 (PMN)-PT and Pb(Zn1/3Nb2/3)O-3 (PZN)-PT piezoerystals, making them very interesting high-T-C and high-performance piezoelectric materials. (c) 2005 Elsevier B.V. All rights reserved.