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Giant Electrostrictive Responses and Temperature Insensitive Strain in Barium Titanate‐Based Ceramics
Author(s) -
Huang Yanli,
Zhao Chunlin,
Wu Jiagang
Publication year - 2018
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201800075
Subject(s) - electrostriction , materials science , ceramic , barium titanate , curie temperature , ferroelectricity , atmospheric temperature range , temperature coefficient , strain (injury) , composite material , ferroelectric ceramics , analytical chemistry (journal) , mineralogy , condensed matter physics , thermodynamics , piezoelectricity , optoelectronics , dielectric , chemistry , chromatography , medicine , physics , ferromagnetism
Here, a large electrostrictive response and temperature‐insensitive strain in BaTiO 3 ceramics are realized by introducing (M 0.5 N 0.5 )TiO 3 (M = K/Na/Li, N = rare earth elements). Temperature (25–130 °C) insensitivity of the giant electrostrictive coefficient ( Q 33 = 0.05–0.07 m 4 C −2 ) is observed in BT‐(Li, Ho/Y/Yb)T ceramics, which is almost twice larger than those of other classical ferroelectric ceramics. In addition, the overall variation of the strain value in 0.95BaTiO 3 –0.05(Li 0.5 Ho 0.5 )TiO 3 [BT‐(Li, Ho)T] ceramics is less than 5% in the temperature range of room temperature to 130 °C, which is obviously superior to the reported results. It is also found that the Curie temperature of this work can be increased up to 130–145 °C by optimizing the compositions. It is believed that the temperature‐insensitive strain and giant electrostrictive effect can promote the development of lead‐free BaTiO 3 ceramics.