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- Title
Phase transitional behavior and enhanced electrical properties of Bi(ScIn)O-PbTiO by small content Pb(MgNb)O modification.
- Authors
Zhao, Tian-Long; Wang, Chun-Ming; Chen, Jianguo; Wang, Chun-Lei; Dong, Shuxiang
- Abstract
(0.98 − x)Bi(ScIn)O- xPbTiO-0.02Pb(MgNb)O (BSI- xPT-PMN, x = 0.56-0.60) ternary solid solutions near the morphotropic phase boundary (MPB) have been designed and prepared using the two-step columbite precursor method. Microstructural morphology, phase transition, and electrical properties of the BSI- xPT-PMN ceramics were investigated in detail. X-ray powder diffraction analysis indicated that the BSI- xPT-PMN ceramics were of pure perovskite phase, and the MPB between the rhombohedral and tetragonal phases located at x = 0.58, which are also confirmed by their compositional dependence piezoelectric and electromechanical properties. The piezoelectric properties were enhanced significantly by the introduction of a small amount of PMN, and the piezoelectric constant d is doubled that of the binary Bi(ScIn)O-PbTiO system. The optimal piezoelectric properties were obtained for the MPB composition 0.40BSI-0.58PT-0.02PMN, which exhibits a piezoelectric constant d of 403 pC/N, planar electromechanical coupling factor k of 47.2 %, remnant polarization P of 36.4 µC/cm, and Curie temperature T of 421 °C. Additionally, the BSI- xPT-PMN systems reduce the content of ScO in comparison with the BS-PT systems. The enhanced piezoelectric performance, together with the good thermal stabilities, makes the BSI- xPT-PMN ceramics promising candidates for high temperature piezoelectric applications.
- Subjects
PHASE transitions; X-ray powder diffraction; PEROVSKITE; HEMATITE; PIEZOELECTRIC devices; THERMAL stability; CURIE temperature
- Publication
Journal of Materials Science: Materials in Electronics, 2016, Vol 27, Issue 1, p606
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-3795-4