Effects of (LiCe) co-substitution on the structural and electrical properties of CaBi2Nb2O9 ceramics |
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| Authors: | Tian Xiao-Xi Qu Shao-Bo Du Hong-Liang Li Ye and Xu Zhuo |
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| Institution: | College of Science, Air Force Engineering University, Xián 710051, China;College of Science, Air Force Engineering University, Xián 710051, China;Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xián Jiaotong University, Xián 710049, China;College of Science, Air Force Engineering University, Xián 710051, China;College of Science, Air Force Engineering University, Xián 710051, China;Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xián Jiaotong University, Xián 710049, China |
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| Abstract: | The piezoelectric, dielectric, and ferroelectric properties of the (LiCe) co-substituted calcium bismuth niobate (CaBi2Nb2O9, CBNO) are investigated. The piezoelectric properties of CBNO ceramics are significantly enhanced and the dielectric loss tanδ decreased. This makes poling using (LiCe) co-substitution easier. The ceramics (where □ represents A-site Ca2+ vacancies, possess a pure layered structure phase and no other phases can be found. The Ca0.88(LiCe)0.04□0.04Bi2Nb2O9 ceramics possess optimal piezoelectric properties, with piezoelectric coefficient (d33) and Curie temperature (TC) found to be 13.3 pC/N and 960 ℃, respectively. The dielectric and piezoelectric properties of the (LiCe) co-substituted CBNO ceramics exhibit very stable temperature behaviours. This demonstrates that the CBNO ceramics are a promising candidate for ultrahigh temperature applications. |
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| Keywords: | co-substitution structural properties electrical properties CaBi2Nb2O9 |
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