Preparation and Characterization of Lead-Free Piezoelectric Ceramics
(K, Na)NbO3, Perovskite, Piezoelectric Properties, Sintering
Digital Object Identifier (DOI)
(K,Na)NbO3-based piezoelectric ceramics are promising candidates for practical applications of lead-free piezoelectric materials due to their excellent piezoelectric properties. In this paper, lead-free piezoelectric ceramics (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3 (KNL-NTS) were successfully fabricated by traditional ceramics processing. The effects of sintering temperature on the structure, density and electrical properties of KNL-NTS ceramics were investigated. Crystal phases of both calcined powders and KNL-NTS ceramics have orthorhombic structure similar to that of KNbO3 ceramics. The piezoelectric coefficient first increases and then decreases with sintering temperature in the 1100-1180 °C range. KNL-NTS ceramics sintered at 1160 °C shows the maximum piezoelectric coefficient of about 199 pC·N-1 and the maximum remnant polarization of 18.75 μC·cm-2, with the corresponding 10.95 kV·cm-1 coercive field and 4.74 g/cm3 density.
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Citation / Publisher Attribution
Key Engineering Materials, v. 492, p. 189-193
Scholar Commons Citation
Chen, Qiang; Li, Jin Xu; Zhang, Li Hui; Bai, Yang; Su, Yan Jing; Qiao, Li Jie; and Volinsky, Alex A., "Preparation and Characterization of Lead-Free Piezoelectric Ceramics" (2011). Mechanical Engineering Faculty Publications. 274.