Journal of Materials Science

, Volume 12, Issue 5, pp 909–914 | Cite as

Observation of CaO corrosion by K2O melts

  • M. Cassou
  • A. Mocellin
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Abstract

A qualitative investigation of CaO single crystal and hot-pressed polycrystal behaviour in high K2O melts is presented. Under carefully controlled anhydrous conditions, no intermediate crystalline compound was detected at temperatures up to 800° C. Calcium oxide dissolves preferentially along grain boundaries and/or along 〈1 0 0〉 directions on {1 0 0} faces. The melt viscosity gradually increases with its CaO content. The single crystal corrosion rate, therefore, decreases with time and a protective glassy layer may eventually develop on its surface.

Keywords

Oxide Polymer Calcium Viscosity Corrosion Rate 

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References

  1. 1.
    M. Cassou, Gaz de France, upublished results.Google Scholar
  2. 2.
    R. W. Rice, J. Amer. Ceram. Soc. 52 (1969) 420; Proc. Brit. Ceram. Soc. 12 (1968) 99.Google Scholar
  3. 3.
    M. W. Benecke, N. E. Olson and J. A. Pask, J. Amer. Ceram. Soc. 50 (1967) 365.Google Scholar
  4. 4.
    E. Rengade, Ann. Chim. Phys. 11 (1907) 425.Google Scholar
  5. 5.
    J. C. Bardin, M. Avallet. and M. Cassou, Compt. Rend. Acad. Sci. Paris C278 (1974) 709.Google Scholar
  6. 6.
    M. G. Barker and A. P. Dawson, J. Less Common Metals 45 (1976) 323.Google Scholar
  7. 7.
    Y. Oishi, A. R. Cooper and W. D. Kingery, J. Amer. Ceram. Soc. 48 (1965) 88.Google Scholar
  8. 8.
    S. Chatterji and J. W. Jeffery, Nature 209 (1966) 1233.Google Scholar
  9. 9.
    F. Natola and Ph. Touzain, Canad. J. Chem. 48 (1970) 1955.Google Scholar

Copyright information

© Chapman and Hall Ltd. 1977

Authors and Affiliations

  • M. Cassou
    • 1
  • A. Mocellin
    • 2
  1. 1.Service de Physique Appliquée/D.E.T.N. Gaz de FranceLa Plaine St DenisFrance
  2. 2.Centre des MatériauxEcole des Mines de ParisEvry CedexFrance

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