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Large electromechanical strain at high temperatures of novel < 001 > textured BiFeGaO3-BaTiO3 based ceramics
Peng, JGL; Liu, WB; Zeng, JT; Zheng, LY; Li, GR; Rousseau, A; Gibaud, A; Kassiba, A
2020-07-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Pages92
SubtypeArticle
AbstractBiFeGaO3-BaTiO3 (BFG-BT) based ceramics with a large piezoelectric coefficient are potential high performance lead-free piezoelectric compounds. In this work, textured and random BFG-BT ceramics were realized by the solid state reaction method with and without BaTiO3 (BT) templates. Textured ceramics were obtained by a reactive templated grain growth (RTGG) method leading to a high-temperature electromechanical strain of S = 0.27% at 40 kV/cm and to an effective piezoelectric coefficient (d(33) *) up to 685 pm/V at 180 degrees C. The easy movement of oriented domains enhanced the electromechanical strain under an applied electric field in textured sample (Lotgering factor f = 66.3%). Structural investigations reveal that the proportion and degree of distortion of BFG-BT rhombohedral phase (R3c) reached its maximum in textured ceramics, resulting in large ferrodistortive displacements under electric fields. In addition, the dense nanodomains with low domain wall energies, inferred from the high-resolution transmission electron microscope (HR-TEM) observations, contribute to the extra displacement of the textured sample under an applied electric field. In textured ceramics, the remnant polarization was stable (about 17 mu C/cm(2)) from room temperature to 180 degrees C, contributing to the stable ferroelectric property at high temperatures. Through the introduction of BT templates, high-density nanodomains were formed and the Burns temperature was enhanced in textured ceramics. The electromechanical strain, polarization and dielectric behavior were correlated to the textured or random forms of the BFG-BT based ceramics. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science Technology.
DOI10.1016/j.jmst.2019.12.033
WOS KeywordLEAD-FREE PIEZOCERAMICS ; TEMPLATED GRAIN-GROWTH ; HIGH CURIE-TEMPERATURE ; ELECTRICAL-PROPERTIES ; PIEZOELECTRIC PROPERTIES ; FABRICATION ; BEHAVIOR ; LASER
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
PublisherJOURNAL MATER SCI TECHNOL
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27943
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Peng, JGL,Liu, WB,Zeng, JT,et al. Large electromechanical strain at high temperatures of novel < 001 > textured BiFeGaO3-BaTiO3 based ceramics[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020:92.
APA Peng, JGL.,Liu, WB.,Zeng, JT.,Zheng, LY.,Li, GR.,...&Kassiba, A.(2020).Large electromechanical strain at high temperatures of novel < 001 > textured BiFeGaO3-BaTiO3 based ceramics.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,92.
MLA Peng, JGL,et al."Large electromechanical strain at high temperatures of novel < 001 > textured BiFeGaO3-BaTiO3 based ceramics".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2020):92.
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