2011/10/12 by Wei Li, Zhijun Xu, Ruiqing Chu +3 · 2 citations
Materials Science · Engineering · #Ferroelectric and Piezoelectric Materials #Microwave Dielectric Ceramics Synthesis #Acoustic Wave Resonator Technologies
paper · doi:10.1111/j.1551-2916.2011.04888.x
Lead‐free ( Ba 1− x Ca x )( Ti 0.96 Sn 0.04 ) O 3 ( BCST ) ( 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 d 33 = 510 pC/N and high planar electromechanical coupling factor of k p = 48% were obtained for the BCST ceramics at x = 0.02. These results indicate that the BCSTs are promising candidates for the widely used lead‐based piezoelectric materials.