Growth and properties of Li, Ta modified (K,Na)NbO3 lead-free piezoelectric single crystals

Authors

Xiaoqing Huo, The Pennsylvania State University
Limei Zheng, Harbin Institute of Technology
Shujun Zhang, The Pennsylvania State UniversityFollow
Rui Zhang, Harbin Institute of TechnologyFollow
Gang Liu, Harbin Institute of Technology, The Pennsylvania State University
Rui Wang, Harbin Institute of TechnologyFollow
Bin Yang, Harbin Institute of Technology
Wenwu Cao, Harbin Institute of Technology, The Pennsylvania State University
Thomas R. Shrout, The Pennsylvania State University

RIS ID

106479

Publication Details

Huo, X., Zheng, L., Zhang, S., Zhang, R., Liu, G., Wang, R., Yang, B., Cao, W. & Shrout, T. R. (2014). Growth and properties of Li, Ta modified (K,Na)NbO3 lead-free piezoelectric single crystals. Physica Status Solidi - Rapid Research Letters, 8 (1), 86-90.

Abstract

Li, Ta modified (K,Na)NbO3 single crystals with the size of 18 mm x 18 mm x 10 mm were successfully grown by top-seeded solution growth method, with orthorhombic-tetra-gonal phase transition temperature ∼79 °C and Curie temperature ∼276 °C. The electromechanical coupling factors k33 and kt were found to be ∼88% and ∼65%, respectively. The piezoelectric coefficient d33 for the [001]c poled crystals reached 255 pC/N. In addition, the electromechanical coupling factor exhibited high stability over the temperature range of -50 °C to 70 °C, making these lead free crystals good candidates for electromechanical applications. 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.