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Growth and properties of Li, Ta modified (K,Na)NbO 3 lead‐free piezoelectric single crystals
Author(s) -
Huo Xiaoqing,
Zheng Limei,
Zhang Shujun,
Zhang Rui,
Liu Gang,
Wang Rui,
Yang Bin,
Cao Wenwu,
Shrout Thomas R.
Publication year - 2014
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201308173
Subject(s) - orthorhombic crystal system , natural bond orbital , piezoelectricity , curie temperature , materials science , electromechanical coupling coefficient , analytical chemistry (journal) , coupling (piping) , atmospheric temperature range , phase transition , phase (matter) , piezoelectric coefficient , crystallography , mineralogy , chemistry , crystal structure , condensed matter physics , thermodynamics , composite material , ferromagnetism , density functional theory , computational chemistry , physics , organic chemistry , chromatography
Li, Ta modified (K,Na)NbO 3 single crystals with the size of 18 mm × 18 mm × 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 k 33 and k t were found to be ∼88% and ∼65%, respectively. The piezoelectric coefficient d 33 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)