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Large electrostrictive effect in K 0.99 Li 0.01 Ta 1− x Nb x O 3 lead‐free single crystals
Author(s) -
Tian Hao,
Jia Jieshu,
Zhou Zhongxiang,
Chen Deying
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127677
Subject(s) - electrostriction , materials science , dielectric , curie temperature , analytical chemistry (journal) , single crystal , niobium , crystallography , condensed matter physics , piezoelectricity , chemistry , metallurgy , optoelectronics , physics , composite material , chromatography , ferromagnetism
Paraelectric K 0.99 Li 0.01 Ta 1− x Nb x O 3 ( x = 0.38, 0.39, 0.40) lead‐free single crystals have been grown by the top‐seeded solution growth method. All the crystals have Curie temperature ( T c ) close to room temperature (RT), and possess large relative dielectric constants near T c . A scanning Michelson interferometer was used to investigate the electrostrictive (ES) behavior of the crystals. The crystals show pure ES characteristics and large electrosrictive coefficients. The ES coefficient Q 11 of K 0.99 Li 0.01 Ta 0.60 Nb 0.40 O 3 reaches as high as 0.12 m 4 /C 2 , about six times of the value of Pb(Mg 1/3 Nb 2/3 )O 3 ceramics.