(1 − x)Bi0.5Na0.5TiO3–xBaTiO3 lead-free piezoelectric ceramics for energy-harvesting applications. Issue 7 (July 2015)

• Record Type: Journal Article
• Authors: Kang, Woo-Seok; Koh, Jung-Hyuk
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 7(2015:Jul.)
• Page Start: 2057
• Page End: 2064
• Publication Date: 2015-07
• Subjects: Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2014.12.036
• Languages: English
• ISSNs: 0955-2219

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <p id="spar0005">Lead-free (1−<italic>x</italic>)Bi_0.5Na_0.5TiO₃–<italic>x</italic>BaTiO₃ piezoelectric ceramics were investigated for energy-harvesting applications. In order to enhance the piezoelectric properties, the BaTiO₃ content was varied at 0 ≤ <italic>x</italic> ≤ 0.1. Furthermore, the sintering temperature was optimized to enhance the piezoelectric properties and output energies. The piezoelectric charge coefficient was enhanced from 70 to 164 pC/N by introducing BaTiO₃ and optimizing the sintering temperature to 1175 °C. The (1 − <italic>x</italic>)Bi_0.5Na_0.5TiO₃–<italic>x</italic>BaTiO₃ lead-free piezoelectric ceramics exhibited a piezoelectric voltage coefficient of 47.03 × 10⁻³ V m/N at <italic>x</italic> = 0.04, which is slightly higher than the piezoelectric voltage coefficient of lead-based piezoelectric ceramics. The generated output voltage and output power were 8.95 V and 18 nW, respectively, for 0.94Bi_0.5Na_0.5TiO₃–0.06BaTiO₃ ceramics sintered at 1175 °C. The results suggest that lead-free (1 − <italic>x</italic>)Bi_0.5Na_0.5TiO₃–<italic>x</italic>BaTiO₃ piezoelectric ceramics are good candidates for energy-harvesting applications.</p> </sec> </abstract>