Preparation and Characterization of Lead-Free Piezoelectric Ceramics

Abstract:

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(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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Periodical:

Edited by:

Yiwang Bao, Danyu Jiang, Li Tian and Jianghong Gong

Pages:

189-193

DOI:

10.4028/www.scientific.net/KEM.492.189

Citation:

Q. Chen et al., "Preparation and Characterization of Lead-Free Piezoelectric Ceramics", Key Engineering Materials, Vol. 492, pp. 189-193, 2012

Online since:

September 2011

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$35.00

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