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Enhanced piezoelectric properties of 〈001〉 textured lead‐free (K x Na 1 − x ) 0.946 Li 0.054 NbO 3 ceramics with large strain
Author(s) -
Hao Jigong,
Ye Chenggen,
Shen Bo,
Zhai Jiwei
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.201127747
Subject(s) - natural bond orbital , materials science , texture (cosmology) , piezoelectricity , ceramic , hysteresis , thermal hysteresis , mineralogy , analytical chemistry (journal) , phase transition , composite material , condensed matter physics , chemistry , physics , density functional theory , computational chemistry , artificial intelligence , computer science , image (mathematics) , chromatography
Dense 〈001〉‐oriented (K x Na 1 − x ) 0.946 Li 0.054 NbO 3 (K x NLN) ceramics with high texture quality (Lotgering factor F 001 > 80%) and excellent piezoelectric properties were produced by templated grain growth using plate‐like NaNbO 3 particles as templates. Compared with randomly oriented K x NLN ceramics, textured samples show greatly enhanced properties. The room‐temperature strain hysteresis S , the piezoelectric coefficient $d_{{\rm 33}}^{{\rm *}} $ and d 33 reach up to 0.15–0.21%, 333–471 pm/V, and 231–254 pC/N, respectively, which are all about 1.6–1.8 times larger than those of nontextured ceramics with the same composition. The temperature‐dependent strain characteristic is shown in both textured and nontextured ceramics around the polymorphic phase transition (PPT) temperature, confirming that this behavior is determined by the PPT temperature, which is unaffected by texturing. Moreover, good resistance to thermal depoling was obtained in K x NLN ceramics, indicating this system is a very promising piezoelectric material for high‐temperature applications.