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(K, Na, Li)(Nb, Ta)O 3 :Mn Lead‐Free Single Crystal with High Piezoelectric Properties
Author(s) -
Huo Xiaoqing,
Zhang Rui,
Zheng Limei,
Zhang Shujun,
Wang Rui,
Wang Junjun,
Sang Shijing,
Yang Bin,
Cao Wenwu
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13540
Subject(s) - piezoelectricity , materials science , single crystal , dielectric , crystal (programming language) , piezoelectric coefficient , domain wall (magnetism) , electromechanical coupling coefficient , coupling (piping) , resonance (particle physics) , condensed matter physics , nuclear magnetic resonance , analytical chemistry (journal) , composite material , physics , chemistry , magnetic field , optoelectronics , atomic physics , magnetization , chromatography , computer science , programming language , quantum mechanics
Lead‐free single crystal, (K, Na, Li)(Nb, Ta)O 3 :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 d 33 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 ( d 33 ∗ = 630 pC/N) and strain–field curve ( d 33∗ ∗ = 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 ( k 33 ~95%) and high ultrasound velocity, which make it promising for high‐frequency medical transducer applications.