Journal of Materials Science

, Volume 7, Issue 10, pp 1192–1196 | Cite as

Phase equilibria in the system BaTiO3-BaGeO3

  • J. P. Guha
  • D. Kolar


The system BaTiO3-BaGeO3 has been investigated by DTA, metallographic and X-ray diffraction methods. A number of selected samples were also analysed on the electron probe micro-analyser. The system was found to be of the simple binary-eutectic type with partial solid solubility at both ends. The eutectic composition was established as 68±0.5 mol% BaGeO3 and its melting temperature as 1120±5° C. The solid solubility of BaGeO3 in BaTiO3 at 1120°C was found to be 1.8 mol % and that of BaTiO3 in BaGeO3 2.2 mol %. Additions of BaGeO3 to BaTiO3 did not appear to cause any change in the temperature of the cubic to hexagonal inversion of BaTiO3 but the temperature of the tetragonal to cubic inversion was raised slightly with such additions. The transformation temperature of 1180° C for the low- to high-temperature form of BaGe03 was not affected by additions of BaTiO3


Polymer Hexagonal Melting Temperature Phase Equilibrium BaTiO3 
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Copyright information

© Chapman and Hall Ltd 1972

Authors and Affiliations

  • J. P. Guha
    • 1
  • D. Kolar
    • 1
  1. 1.Institute Jožef StefanUniversity of LjubljanaLjubljanaYugoslavia

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