(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: BNT–BT -- Lead free -- Energy harvesting; 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: Lead-free (1− x )Bi0.5 Na0.5 TiO3 – x BaTiO3 piezoelectric ceramics were investigated for energy-harvesting applications. In order to enhance the piezoelectric properties, the BaTiO3 content was varied at 0 ≤ x ≤ 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 − x )Bi0.5 Na0.5 TiO3 – x BaTiO3 lead-free piezoelectric ceramics exhibited a piezoelectric voltage coefficient of 47.03 × 10 −3 V m/N at x = 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 0.94Bi0.5 Na0.5 TiO3 –0.06BaTiO3 ceramics sintered at 1175 °C. The results suggest that lead-free (1 − x )Bi0.5 Na0.5 TiO3 – x BaTiO3 piezoelectric ceramics are good candidates for energy-harvesting applications.