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Improvement in the sintering process of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics by the replacement of Zr by Hf

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Abstract

We investigate the effects of replacing Zr4+ ions by Hf4+ on the sintering and electrical properties of Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) lead-free piezoceramics. For that purpose, Ba0.85Ca0.15Hf0.1Ti0.9O3 ceramics were sintered at different temperatures and their properties were compared to those of BCZT fabricated under the same conditions. We show that Hf as B-site dopant facilitates the formation of the perovskite phase during the calcination process and improves the electrical properties of the ceramics due to the development of a denser microstructure with greater grain size and lower porosity.

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Acknowledgments

We thank Miriam Castro and Rodrigo Parra for their cooperation in the Raman measurements. We thank Pablo Risso for the SEM measurements. This work was sponsored by Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET) and Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) de la República Argentina. MGS thanks support from Consejo de Investigaciones de la Universidad Nacional de Rosario (CIUNR).

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Authors and Affiliations

  1. Instituto de Física Rosario, Universidad Nacional de Rosario-CONICET, 27 de Febrero 210 Bis, 2000, Rosario, Argentina

    A. Di Loreto, R. Machado, A. Frattini & M. G. Stachiotti

  2. Área Física, Dpto. de Química Física, FCByF, Universidad Nacional de Rosario, 2000, Rosario, Argentina

    A. Di Loreto & A. Frattini

Authors
  1. A. Di Loreto
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  2. R. Machado
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  3. A. Frattini
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  4. M. G. Stachiotti
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Correspondence to M. G. Stachiotti.

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Di Loreto, A., Machado, R., Frattini, A. et al. Improvement in the sintering process of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics by the replacement of Zr by Hf. J Mater Sci: Mater Electron 28, 588–594 (2017). https://doi.org/10.1007/s10854-016-5562-6

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  • DOI: https://doi.org/10.1007/s10854-016-5562-6

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