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Enhanced piezoelectric properties of off-stoichiometric strontium bismuth tantalate Sr0.8Bi2.2Ta2O9 ceramics

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Abstract

The piezoelectric properties of strontium bismuth tantalate SrBi2Ta2O9 (SBT) ceramics were enhanced by introducing off-stoichiometry into the starting materials. Sr-deficient and Bi-excess SBT, Sr0.8Bi2.2Ta2O9 (S0.8B2.2T), ceramic samples were prepared by a conventional ceramic technique. The optimum poling conditions (temperature Tp, time tp, and electric field Ep) were investigated for the piezoelectric measurement. All the obtained independent electromechanical coupling factors of the S0.8B2.2T dense ceramics were as follows: kp=10.6, k31=6.8, k33=14.0, k15=7.8, and kt=16.2%. The physical constants of the S0.8B2.2T ceramics were also determined. The piezoelectric constants were d33=13.0, d31=6.0, and d15=10.2 pC/N.

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Authors and Affiliations

  1. Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma City, Nara, 630-0192, Japan

    H. Takeda, C. Fujioka, R. Aoyagi, S. Okamura & T. Shiosaki

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  1. H. Takeda
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  2. C. Fujioka
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  3. R. Aoyagi
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  4. S. Okamura
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  5. T. Shiosaki
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Correspondence to H. Takeda.

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PACS

77.84.Dy; 61.66.Fn; 77.65.-j

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Takeda, H., Fujioka, C., Aoyagi, R. et al. Enhanced piezoelectric properties of off-stoichiometric strontium bismuth tantalate Sr0.8Bi2.2Ta2O9 ceramics. Appl. Phys. A 81, 131–135 (2005). https://doi.org/10.1007/s00339-004-3073-4

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  • DOI: https://doi.org/10.1007/s00339-004-3073-4

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