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Measurements of the thermal, dielectric, piezoelectric, pyroelectric and elastic properties of porous PZT samples

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Abstract

The introduction of porosity into ferroelectric ceramics has been of great interest in recent years. In particular, studies of porous lead-zirconate-titanate ceramic (PZT) have been made. In the research reported, samples of Ferroperm Pz27 with porosities of 20, 25 and 30% were studied. Very complete measurements were made of all of the physical properties relevant for ferroelectric applications including thermal conductivity and diffusivity, heat capacity, dielectric, pyroelectric, piezoelectric and elastic properties. Scanning electron micrographs indicated a change from 3-0 to 3-3 connectivity with increasing porosity. Although most of the physical properties are degraded by the presence of porosity, both piezoelectric and pyroelectric figures-of-merit are improved because of the markedly reduced relative permittivity. Porous ferroelectric ceramics are very promising materials for a number of applications.

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Acknowledgements

The authors thank J.C. Lashley (Los Alamos Scientific Laboratory) and Y.W. Wong (Hong Kong Polytechnic University) for making the heat capacity measurements.

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Authors and Affiliations

  1. Department of Chemical Engineering, Ben-Gurion University of the Negev, 84105, Beer Sheva, Israel

    Sidney B. Lang

  2. Meggitt Sensing Systems, Hejreskovvej 18A, 3490, Kvistgård, Denmark

    Erling Ringgaard

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  1. Sidney B. Lang
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  2. Erling Ringgaard
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Correspondence to Sidney B. Lang.

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Lang, S.B., Ringgaard, E. Measurements of the thermal, dielectric, piezoelectric, pyroelectric and elastic properties of porous PZT samples. Appl. Phys. A 107, 631–638 (2012). https://doi.org/10.1007/s00339-012-6846-1

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  • DOI: https://doi.org/10.1007/s00339-012-6846-1

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