Effect of Co-Substitution of Na0.5bi0.5tio3 and Catio3 on the Structure and Properties of Bifeo3 Ceramics
BiFeO 3 is the most essential single-phase multiferroic material at room temperature. In this work, the crystal structure, dielectric, ferroelectric and magnetic properties of CaTiO 3 and Na 0.5 Bi 0.5 TiO 3 co-substituted BiFeO 3 ceramics prepared by standard solid-state reaction method were investigated. All ceramics exhibit rhombohedral R3c phase with dense microstructure. The DSC and dielectric analysis confirmed that the Curie temperature T C increased linearly with increasing Na 0.5 Bi 0.5 TiO 3 content. The dielectric loss tanδ reduced by introducing Na + and high valence Ti 4+ ion. Meanwhile, the leakage current of the ceramics samples with Na + ion is three orders of magnitude lower than that of the sample without Na + ion. The improvement of breakdown field strength and piezoelectric properties was attributed to the decrease in leakage current. In addition, the magnetic properties of Na 0.5 Bi 0.5 TiO 3 -substituted ceramics have been improved to a certain extent, and the maximum remnant magnetization M r was obtained at x = 0.08, where M r = 62.4 emu/mol, which indicated that the magnetic properties are affected by the substitution content of the A and B sites
Year of publication: |
[2022]
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Authors: | Xiang, Lilin ; Liu, Juan ; Xie, Ruyan ; Guo, Xiangtai ; Wang, Lejiang ; Xu, Dong |
Publisher: |
[S.l.] : SSRN |
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