Journal of Materials Science

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

Observation of CaO corrosion by K2O melts

  • M. Cassou
  • A. Mocellin


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.


Oxide Polymer Calcium Viscosity Corrosion Rate 
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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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