Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29253
Title: Effect of alkali elements content on the structure and electrical properties of (K0.48Na0.48Li0.04)(Nb 0.90Ta0.04Sb0.06)O3 lead-free piezoelectric ceramics
Authors: Lin, D
Kwok, KW 
Chan, HLW 
Issue Date: 2009
Publisher: Wiley-Blackwell
Source: Journal of the American Ceramic Society, 2009, v. 92, no. 11, p. 2765-2767 How to cite?
Journal: Journal of the American Ceramic Society 
Abstract: In this communication, we report on the effects of alkaline elements (K, Na, and Li) content on the electrical properties of (K0.48Na 0.48Li0.04)(Nb0.90Sb0.06Ta 0.04)O3 ceramics. Because of the high volatility, the alkaline elements evaporate during the high-temperature sintering process, generating vacancy defects in the ceramics. As a result, the ferroelectric and piezoelectric properties of the ceramics become weakened. Our results reveal that the volatilization loss can be effectively compensated by a 1 mol% excess of alkaline elements. The remanent polarization Pr, piezoelectric coefficient d33, and electromechanical coupling coefficient k p of the compensated ceramics are improved by 15%, 16%, and 20%, respectively, having a value of 30 μC/cm2, 310 pC/N, and 0.6.
URI: http://hdl.handle.net/10397/29253
ISSN: 0002-7820
EISSN: 1551-2916
DOI: 10.1111/j.1551-2916.2009.03239.x
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