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Dielectric and piezoelectric properties of Bi0·5(Na0·82K0·18)0·5 TiO3-LiSbO3 lead-free piezoelectric ceramics

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Abstract

The (1−x)Bi0·5(Na0·82K0·18)0·5TiO3−x LiSbO3 (x = 0−0·03) lead-free piezoelectric ceramics were fabricated by a conventional solid-state reaction method and the effect of LiSbO3 addition on microstructure and electrical properties of the ceramics was investigated. The results of XRD measurement show that Li+ and Sb5+ diffuse into the Bi0·5(Na0·82K0·18)0·5TiO3 lattices to form a solid solution with a pure perovskite structure. The LiSbO3 addition has no remarkable effect on the crystal structure. However, a significant change in grain size took place. Simultaneously, with increasing amount of LiSbO3, the temperature for a antiferroelectric to paraelectric phase transition clearly increases. The piezoelectric constant d 33 and the electromechanical coupling factor k p show an obvious improvement by adding small amount of LiSbO3, which shows optimum values of d 33 = 175 pC/N and k p = 0·36 at x = 0·01.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, Hunan, 410083, P.R. China

    Chong-Rong Zhou & Li-Yuan Chai

  2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, P.R. China

    Chong-Rong Zhou

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  1. Chong-Rong Zhou
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  2. Li-Yuan Chai
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Correspondence to Chong-Rong Zhou.

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Zhou, CR., Chai, LY. Dielectric and piezoelectric properties of Bi0·5(Na0·82K0·18)0·5 TiO3-LiSbO3 lead-free piezoelectric ceramics. Bull Mater Sci 34, 933 (2011). https://doi.org/10.1007/s12034-011-0217-y

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  • DOI: https://doi.org/10.1007/s12034-011-0217-y

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