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(1 − x)(Bi,Na)TiO3−x (Ba,Sr)TiO3 lead-free piezoelectric ceramics for piezoelectric energy harvesting

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Abstract

Lead-free piezoelectric (1 − x)(Bi0.5Na0.5)TiO3−x (Ba0.5Sr0.5)TiO3 (x = 0, 0.03, 0.06, 0.08, 0.12) ceramics were fabricated by using a conventional ceramic sintering method. The piezoelectric properties of (1 − x)(Bi0.5Na0.5)TiO3−x (Ba0.5Sr0.5)TiO3 lead-free ceramics were investigated. The crystallinity and the microstructure of (1 − x)(Bi0.5Na0.5)TiO3−x (Ba0.5Sr0.5)TiO3 ceramics were observed employing X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The morphotropic phase boundary (MPB) of the rhombohedral and the tetragonal phases was detected at x = 0.08 by using the XRD patterns. In addition, the piezoelectric and the dielectric properties of (1 − x)(Bi0.5Na0.5)TiO3−x (Ba0.5Sr0.5)TiO3 were characterized. A piezoelectric coefficient d33 of 118 pC/N, an electromechanical coupling factor k p of 35.17%, a generated output power of 17.15 nW, and a figure of merit of 2.85 pm2/N were obtained.

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Authors and Affiliations

  1. School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, 156-756, Korea

    Young-Hoon Kwon, Dong-Jin Shin & Jung-Hyuk Koh

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  1. Young-Hoon Kwon
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  2. Dong-Jin Shin
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  3. Jung-Hyuk Koh
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Correspondence to Jung-Hyuk Koh.

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Kwon, YH., Shin, DJ. & Koh, JH. (1 − x)(Bi,Na)TiO3−x (Ba,Sr)TiO3 lead-free piezoelectric ceramics for piezoelectric energy harvesting. Journal of the Korean Physical Society 66, 1067–1071 (2015). https://doi.org/10.3938/jkps.66.1067

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  • DOI: https://doi.org/10.3938/jkps.66.1067

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