Variation of Dielectric Constant and Spontaneous Strain With Density in Polycrystalline Barium Titanate

  • H. H. Stadelmaier
  • S. W. Derbyshire
Conference paper
Part of the Materials Science Research book series (MSR)


A simple model of a porous ferroelectric explains the change of the dielectric constant with density. This model agrees well with the experimental results. Certain barium titanate powders show a low spontaneous strain so that their structure at room temperature appears to be cubic rather than tetragonal. Compacts prepared from such a powder exhibit an increase in spontaneous strain with increasing density, and this is explained with a model that is based on Devonshire’s thermodynamic theory.


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Copyright information

© Springer Science+Business Media New York 1966

Authors and Affiliations

  • H. H. Stadelmaier
    • 1
  • S. W. Derbyshire
    • 1
  1. 1.North Carolina State UniversityRaleighUSA

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