Li, Y., Jiang, N., Lam, K. H. , Guo, Y., Zheng, Q., Li, Q., Zhou, W., Wan, Y. and Lin, D. (2014) Structure, ferroelectric, piezoelectric, and ferromagnetic properties of BiFeO3-BaTiO3-Bi0.5Na0.5TiO3 lead-free multiferroic ceramics. Journal of the American Ceramic Society, 97(11), pp. 3602-3608. (doi: 10.1111/jace.13169)
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Abstract
Lead-free multiferroic ceramics of BiFeO3-BaTiO3-Bi0.5Na0.5TiO3 have been prepared by a conventional ceramic technique. The microstructure, multiferroic, and piezoelectric properties of the ceramics have been studied. The ceramics sintered at 1000°C for 2 h possess a pure perovskite structure and a morphotropic phase boundary of rhombohedral and tetragonal phases is formed at x = 0.02. After the addition of Bi0.5Na0.5TiO3, two dielectric anomalies are observed at high temperatures (Tm ~ 510°C–570°C and T2 ~ 720°C). The phase transition around Tm becomes wider gradually with increasing x. The ferroelectricity, piezoelectricity, and ferromagnetism of the ceramics are significantly improved after the addition of Bi0.5Na0.5TiO3. High resistivity (~1.3 × 109 Ω·cm), strong ferroelectricity (Pr = 27.4 μC/cm2), good piezoelectricity (d33 =140 pC/N, kp = 31.4%), and weak magnetic properties (Mr =0.19 emu/g) are observed.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lam, Dr Koko |
| Authors: | Li, Y., Jiang, N., Lam, K. H., Guo, Y., Zheng, Q., Li, Q., Zhou, W., Wan, Y., and Lin, D. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Journal of the American Ceramic Society |
| Publisher: | Wiley |
| ISSN: | 0002-7820 |
| ISSN (Online): | 1551-2916 |
| Published Online: | 04 August 2014 |
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