Abstract
New lead-free ceramics (1-x)NaNbO3-xBi0.5K0.5TiO3have been fabricated by the conventional ceramic sintering technique, and their ferroelectric and piezoelectric properties have been studied. The results of X-ray diffraction reveal that Bi0.5K0.5TiO3diffuses into the NaNbO3lattices to form a new perovskite-type solid solution with orthorhombic symmetry. The addition of a small amount of Bi0.5K0.5TiO3(x ≥ 0.025) transforms the ceramics from antiferroelectric to ferroelectric. The ceramic with x = 0.10 possesses the largest remanent polarization Prand thus exhibits the optimum piezoelectric properties, giving d33= 71 pC/N, kp= 16.6% and kt= 39.7%. The ceramics with low doping level of Bi0.5K0.5TiO3are normal ferroelectrics and the ferroelectric-paraelectric phase transition becomes diffusive gradually with the doping level x of Bi0.5K0.5TiO3increasing. Our results show the (1-x)NaNbO3-xBi0.5K0.5TiO3ceramics is one of the good candidates for lead-free piezoelectric and ferroelectric materials.
Original language | English |
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Pages (from-to) | 1060-1065 |
Number of pages | 6 |
Journal | Journal of Materials Science: Materials in Electronics |
Volume | 21 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1 Oct 2010 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering