Title

Preparation and Characterization of Lead-Free Piezoelectric Ceramics

Document Type

Article

Publication Date

2011

Keywords

(K, Na)NbO3, Perovskite, Piezoelectric Properties, Sintering

Digital Object Identifier (DOI)

https://doi.org/10.4028/www.scientific.net/KEM.492.189

Abstract

Abstract:

(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

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