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The kinetics of hot-pressing for undoped and donor-doped BaTiO3 ceramics

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Abstract

The kinetics of hot-pressing for undoped and donor-doped BaTiO3 of high purity have been studied at 1050‡ C and at 2.3 to 27.6 MPa in an oxidizing atmosphere. The stress exponent and grain size exponent of the densification rate are indicative of control of densification by a grain boundary diffusion mechanism. The activation enthalpy (∼400 kJ mol−1) for the densification process has been measured over the range of 1050 to 1 200‡ C. No significant influence of the donor is observed on the densification of BaTiO3 until the late stages of sintering.

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Author notes

  1. L. A. Xue

    Present address: Department of Materials Science and Engineering, University of Michigan, 48109, Ann Arbor, Michigan, USA

  2. R. J. Brook

    Present address: Max Planck Institut für Metallforschung, 7000, Stuttgart 80, West Germany

Authors and Affiliations

  1. Department of Ceramics, The University of Leeds, LS2 9JT, Leeds, UK

    L. A. Xue, E. Gilbart & R. J. Brook

  2. Department of Civil Engineering, The University of Leeds, LS2 9JT, Leeds, UK

    Y. Chen

Authors
  1. L. A. Xue
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  2. Y. Chen
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  3. E. Gilbart
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  4. R. J. Brook
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Xue, L.A., Chen, Y., Gilbart, E. et al. The kinetics of hot-pressing for undoped and donor-doped BaTiO3 ceramics. J Mater Sci 25, 1423–1428 (1990). https://doi.org/10.1007/BF00585460

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  • DOI: https://doi.org/10.1007/BF00585460

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