高级检索
无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

四方相铌镁酸铅-钛酸铅(PMN-PT)铁电单晶的弹性、介电、压电和机电性能

曹虎; 方必军; 徐海清; 罗豪甦   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室 上海嘉定 201800
  • 收稿日期:2002-02-01 修回日期:2002-03-08 出版日期:2003-03-20 网络出版日期:2003-03-20

Elastic, Dielectric, Piezoelectric and Electromechanical Properties of Tetragonal Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT)

CAO Hu; FANG Bi-Jun; XU Hai-Qing; LUO Hao-Su   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Academy of Sciences; Shanghai 201800; China
  • Received:2002-02-01 Revised:2002-03-08 Published:2003-03-20 Online:2003-03-20

PDF (PC)

1260

被引次数

17

摘要： 研究了四方相弛豫铁电单晶Pb(Mg1/3Nb2/3)O3-38％PbTiO3(PMNT62/38)的介温特性,并利用HP4192A阻抗分析仪测量了PMNT62/38单晶完整的一套弹性、介电、压电和机电耦合系数,为理论研究和器件设计提供了参考,其居里点Tc～174℃;压电应变常量d33～300pC/N;介电常数ε33～734,ε11～4301;机电耦合因数k33～84.6％,kt～60.8％,k31～44.5％,k15～45.9％.

关键词: PMN-PT单晶, 弹性、介电、压电和机电耦合系数, 谐振-反谐振法

Abstract: Relaxor ferroelectric single crystal Pb(Mg1/3Nb2/3)O3-38%PbTiO3 (PMNT62/38) was grown
directly from melt by a modified Bridgman technique. The XRD analysis confirms that PMNT62/38 single crystal has a tetragonal structure at room
temperature. The εr-T peak at Tc and little dispersion over measured temperature range indicate that the PMNT62/38 single crystal is
a normal ferroelectric. The full set of electromechanical properties was determined by using an impedance resonance technique, the Curie temperature
being about 174℃, piezoelectric constant d33～300pC/N, and permittivity ε33～734 and ε11～4301. Electric-mechanical coupling coefficients measured are k33 84.6%, kt 60.8%,
k31 44.5% and k15 45.9%.

Key words: PMN-PT single crystal, impedance resonance technique, electromechanical properties

中图分类号: