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Lead-free (Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3-xwt %CuO ceramics with high piezoelectric coefficient by low-temperature sintering

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Abstract

Lead-free (Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3-xwt %CuO(BCZT-xCu) piezoelectric ceramics have been fabricated by the solid-state reaction process and the effects of CuO addition on the phase structure and piezoelectric properties of the ceramics have been studied. Our results reveal that the addition of CuO significantly improves the sinterability of BCZT ceramics which results in a reduction of sintering temperature from 1,540 to 1,350 °C without sacrificing the high piezoelectric properties. X-ray diffraction (XRD) data shows that CuO diffuses into the lattice of BCZT-xCu ceramics and a pure perovskite phase forms in the ceramic. SEM images indicate that a small amount of CuO addition affects the microstructure, obviously. Main piezoelectric parameters of these ceramics are optimized around x = 0.04 wt % with a high piezoelectric coefficient (d 33 = 510 pC/N), a planar electromechanical coefficient k p of 45%, a high dielectric constant (ε r  = 3,762) and a low dissipation factor (tanδ = 1.05%) at 1 kHz. The results indicate that the BCZT-xCu ceramics are promising lead-free practical applications.

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Acknowledgments

The authors wish to acknowledge the financial support of the National Nature Science Foundations, grant No. 51102056, and Guangxi Nature Science Foundations, grant No.2010GX-NSFD013007, 2011GXNSFB018008.

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Authors and Affiliations

  1. Department of Information Material Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, People’s Republic of China

    Yerang Cui, Xinyu Liu, Minhong Jiang, Yaobin Hu, Qingshuang Su & Hua Wang

  2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Jinji Road No.1, Guilin, Guangxi Province, People’s Republic of China

    Yerang Cui

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  1. Yerang Cui
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  2. Xinyu Liu
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  3. Minhong Jiang
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  4. Yaobin Hu
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  5. Qingshuang Su
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  6. Hua Wang
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Correspondence to Yerang Cui.

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Cui, Y., Liu, X., Jiang, M. et al. Lead-free (Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3-xwt %CuO ceramics with high piezoelectric coefficient by low-temperature sintering. J Mater Sci: Mater Electron 23, 1342–1345 (2012). https://doi.org/10.1007/s10854-011-0596-2

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  • DOI: https://doi.org/10.1007/s10854-011-0596-2

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