Enhanced Piezoelectric Properties and Improved Property Uniformity in Nd-Doped PMN-PT Relaxor Ferroelectric Single Crystals

被引：42

作者：

Li, Qian ^{[1
]}

Liu, Yangbin ^{[1
]}

Liu, Jinfeng ^{[1
]}

Song, Kexin ^{[1
]}

Guo, Haisheng ^{[1
]}

Li, Fei ^{[1
]}

Xu, Zhuo ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Ctr Dielect Res, Key Lab Minist Educ & Int,Elect Mat Res Lab, Xian 710049, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2022年 / 32卷 / 25期

基金：

国家重点研发计划; 中国博士后科学基金; 中国国家自然科学基金;

关键词：

Nd-dopants; piezoelectric transducers; piezoelectricity; relaxor ferroelectric crystals; CURIE-TEMPERATURE; POLARIZATION; SEGREGATION; STRAIN;

D O I：

10.1002/adfm.202201719

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Relaxor-PbTiO3 crystals exhibit excellent piezoelectric properties (d(33) > 2000 pC N-1 and k(33) > 90%) and thus attractes widespread attention in the past two decades. However, the inevitable segregation of components during the crystal growth results in relatively low-performance consistency of Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) crystals, which seriously affects their practical applications. In this work, Nd3+ as A-site substitution is introduced to improve the uniformity of electromechanical performance of PMN-PT crystal. The results show that the crystal exhibits a high piezoelectric coefficient of 3000 pC N-1 in rhombohedral phase with a variation of 36%. The electron probe X-ray microanalyzer indicates that the opposite separation characteristics of Nd3+ and Ti4+ lead to improved uniformity of piezoelectric performance along the crystal boule. The giant piezoelectricity in Nd-doped PMN-PT is attributed to the enhanced local structural heterogeneity introduced by doping Nd. Furthermore, the Nd-doped PMN-PT crystal shows the rhombohedral-tetragonal phase transition temperature in the range of 74-87 degrees C, which indicates that Nd-doped PMN-PT crystal can be a promising candidate for the design of advanced piezoelectric transducers.

引用

页数：7

共 31 条

[1] ATOMIC DISPLACEMENT RELATIONSHIP TO CURIE TEMPERATURE AND SPONTANEOUS POLARIZATION IN DISPLACIVE FERROELECTRICS [J].