Large Piezoelectric Coefficient in (<fc><fr>Ba</fr></fc>1−x<fc><fr>Ca</fr></fc>x)(<fc><fr>Ti0.96Sn0.04</fr></fc>)<fc><fr>O3</fr></fc> Lead-Free Ceramics

Authors: Li, Wei; Xu, Zhijun; Chu, Ruiqing; Fu, Peng; Zang, Guozhong; Zhai, J.

Source: Journal of the American Ceramic Society, Volume 94, Number 12, 1 December 2011 , pp. 4131-4133(3)

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Abstract:

Lead-free (<fc><fr>Ba</fr></fc>_1−x<fc><fr>Ca</fr></fc>_x)(<fc><fr>Ti_0.96Sn_0.04</fr></fc>)<fc><fr>O₃</fr></fc> (<fc>BCST</fc>) (x = 0-0.04) ceramics were prepared using solid-state reaction technique. At room temperature, a polymorphic phase transition from orthorhombic phase to tetragonal phase was identified in the composition range of 0.01 ≤ x ≤ 0.03. Extremely high piezoelectric coefficient of d₃₃ = 510 pC/N and high planar electromechanical coupling factor of k_p = 48% were obtained for the <fc>BCST</fc> ceramics at x = 0.02. These results indicate that the <fc>BCSTs</fc> are promising candidates for the widely used lead-based piezoelectric materials.

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2011.04888.x

Publication date: 2011-12-01