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Journal of Materials Science

, Volume 26, Issue 4, pp 1061–1068 | Cite as

Preparation and properties of some alumina-chrome refractories

  • T. J. Davies
  • H. G. Emblem
  • C. S. Nwobodo
  • A. A. Ogwu
  • V. Tsantzalou
Papers

Abstract

Preparative procedures, grain growth, densification and change in corundum lattice dimensions in sintered compacts made from chromium (III) oxide/aluminium (III) oxide mixtures were evaluated in a study of some alumina-chrome refractories. High-energy milling using “A17 reactive” alumina gave densification at low temperature and rapid grain growth, also a low variability in modulus of rupture. X-ray diffraction studies confirmed solid solution formation, the corundum lattice dimensions decreasing with 7 wt% chromium (III) oxide, other compositions giving lattice expansion. The modulus of rupture at 1150 °C for a series of ethyl silicate-bonded alumina-chrome refractories containing 5 to 12 wt% chromium (III) oxide was also minimal at 7 wt% chromium (III) oxide. The composition of this series is typical of ethyl silicate-bonded alumina-chrome refractories used in the steel industry.

Keywords

Oxide Polymer Alumina Ethyl Chromium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • T. J. Davies
    • 1
  • H. G. Emblem
    • 1
  • C. S. Nwobodo
    • 1
  • A. A. Ogwu
    • 1
  • V. Tsantzalou
    • 1
  1. 1.Manchester Materials Science CentreUniversity of Manchester and UMISTManchesterUK

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