Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals
Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals
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DOI：
10.1063/1.365983
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发表时间：
1997-08-15
影响因子：
3.2
通讯作者：
Shrout, TR
中科院分区：
文献类型：
--
作者：
Park, SE;Shrout, TR
研究了基于弛豫剂的铁电单晶Pb(Zn1/3Nb2/3)O-3-PbTiO3和Pb(Mg1/3Nb2/3)O-3-PbTiO3用作机电致动器的压电性能。与多晶材料（如Pb(Zr,Ti)O-3）相比，对于高压电应变，相变相边界成分不是必需的。观察到压电系数(d(33) s)>2500 pC/N，随后应变水平高达>0.6%，迟滞最小。晶体学上，[001]取向的菱形晶体获得了高应变，尽管[111]是极性方向的。与电场诱导相变有关，可以实现高达1.7%的超高应变水平，比传统压电和电致伸缩陶瓷的应变水平高出一个数量级。高机电耦合(k(33))>90%，低介电损耗
The piezoelectric properties of relaxer based ferroelectric single crystals, such as Pb(Zn1/3Nb2/3)O-3-PbTiO3 and Pb(Mg1/3Nb2/3)O-3-PbTiO3 were investigated for electromechanical actuators. In contrast to polycrystalline materials such as Pb(Zr,Ti)O-3, morphotropic phase boundary compositions were not essential for high piezoelectric strain. Piezoelectric coefficients (d(33)'s)>2500 pC/N and subsequent strain levels up to >0.6% with minimal hysteresis were observed. Crystallographically, high strains are achieved for [001] oriented rhombohedral crystals, although [111] is the polar direction. Ultrahigh strain levels up to 1.7%, an order of magnitude larger than those available from conventional piezoelectric and electrostrictive ceramics, could be achieved being related to an E-field induced phase transformation. High electromechanical coupling (k(33))>90% and low dielectric loss