Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5461206 | Journal of Alloys and Compounds | 2017 | 36 Pages |
Abstract
In this study, an improved method was developed for the preparation of lead-free (Ba1âxCax)(Ti0.91Sn0.09)O3 (BCTS) (0.02 â¤Â x â¤Â 0.07) ceramics by combining the conventional solid-state reaction with a gel precursor mixing method. The effects of Ca content on the microstructural, dielectric, impedance, piezoelectric and ferroelectric properties of the ceramics were systematically investigated. Dense ceramics with a uniform distribution of grain size and sharp grain boundaries were developed. Extremely high electrical properties of d33 â¼620 pC/N, kp â¼46% and ε â¼14500 were obtained at x = 0.03. A dielectric loss peak was observed, correlating to the oxygen vacancy relaxation at elevated temperature. Moreover, the dielectric properties vs. DC bias electric field and the temperature dependences of electrical properties were studied as well. Lastly, BCTS-based monolithic multilayer piezoelectric actuators were successfully fabricated showing large displacements under low driven voltages. These results would be valuable for understanding the electric properties of BCTS ceramics that would in turn extend their applications in multilayer piezoelectric devices.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Peiqing Long, Xitao Liu, Xia Long, Zhiguo Yi,