Polymorphic phase transition and enhanced piezoelectric properties in (Ba0.9Ca0.1)(Ti1xSnx)O3 lead-free ceramics
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Lead-free (Ba0.9Ca0.1)(Ti1-xSn x)O3 (BCTS) (x=0.02-0.1) ceramics were fabricated using conventional solid state reaction method. The effects of Sn substitution on structure and electrical properties of the BCTS ceramics were researched. At room temperature, a polymorphic phase transition (PPT) from tetragonal phase to rhombohedral phase is identified from XRD patterns with increasing Sn content. High piezoelectric coefficient of d33=405 pC/N and planar mode electromechanical coupling factor of kp=43.2% are obtained for the sample at x=0.06. The ceramic for x=0.06 also shows uniform microstructure that contributes to the excellent electrical properties. These results indicate that this BCTS system with optimal composition is a promising lead-free piezoelectric material. 2012 Elsevier B.V.
author list (cited authors)
Chen, M., Xu, Z., Chu, R., Liu, Y., Shao, L., Li, W., Gong, S., & Li, G.
complete list of authors
Chen, Mingli||Xu, Zhijun||Chu, Ruiqing||Liu, Yong||Shao, Lin||Li, Wei||Gong, Shuwen||Li, Guorong