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The Ba0.94Ca0.06Ti0.90Sn0.10O3 lead-free piezoelectric ceramics co-doped with 0.03mol%CeO2 and Nd2O3 (BCTS-Ce-xNd2O3, x=0, 0.01, 0.02, 0.03, 0.04, 0.05) were prepared by solid-state sintering method at 1410°C. The effects of Nd2O3 on phase structure, microstructure and electrical properties were investigated. The X-ray diffraction (XRD) analysis indicates that single perovskite structures were obtained. The tetragonal and rhombohedral phases coexisted in the composition with x=0.02-0.05. SEM images reveal that the grain sizes of the samples decreased from 68.7 μm to 17.1 μm with x increasing. The optimized piezoelectric properties were obtained at x=0.03 with piezoelectric coefficient of 578 pC/N and planar electromechanical coupling factor of 49.0%. Diffuse phase transition behavior of the samples was weakened by the addition of Nd2O3.

Effect of Nd2O3 and CeO2 co-doping on the Dielectric Properties of Ba0.94Ca0.06Ti0.90Sn0.10O3 Lead-Free Ceramics