(k, Na, Li)(nb, Ta)o-3:mn Lead-free Single Crystal With High Piezoelectric Properties

Authors

Xiaoqing Huo, Harbin Institute of Technology
Rui Zhang, Harbin Institute of TechnologyFollow
Limei Zheng, Harbin Institute of Technology
Shujun Zhang, Pennsylvania State UniversityFollow
Rui Wang, Harbin Institute of TechnologyFollow
Junjun Wang, Harbin Institute of Technology
Shijing Sang, Harbin Institute of Technology
Bin Yang, ANSTO, Harbin Institute of Technology
Wenwu Cao, Pennsylvania State University

RIS ID

118068

Publication Details

Huo, X., Zhang, R., Zheng, L., Zhang, S., Wang, R., Wang, J., Sang, S., Yang, B. & Cao, W. (2015). (k, Na, Li)(nb, Ta)o-3:mn Lead-free Single Crystal With High Piezoelectric Properties. Journal Of The American Ceramic Society, 98 (6), 1829-1835.

Abstract

Lead-free single crystal, (K, Na, Li)(Nb, Ta)O3:Mn, was successfully grown using top-seeded solution growth method. Complete matrix of dielectric, piezoelectric, and elastic constants for [001]C poled single crystal was determined. The piezoelectric coefficient d33 measured by the resonance method was 545 pC/N, which is almost three times that of its ceramic counterpart. The values measured by the Berlincourt meter (math formula = 630 pC/N) and strain-field curve (math formula = 870 pm/V) were even higher. The differences were assumed to relate with the different extrinsic contributions of domain wall vibration and domain wall translation during the measurements by different approaches, where the intrinsic contribution (on the order of 539 pm/V) was supposed to be the same. The crystal has ultrahigh electromechanical coupling factor (k33 ~95%) and high ultrasound velocity, which make it promising for high-frequency medical transducer applications.