Mechanical Activation of BaCO3-Al2O3-SiO2

  • S. Bošković
  • Ð. Kosanović
  • Ð. Bahloul-Hourlier
  • P. Thomas
  • Š. Kiš

Abstract

A BaCO3-Al2O3-SiO2 mixture was mechanically activated for 2 and 4 hours. Chemical composition of the mixture corresponded to BaAl2Si2O8. Reaction course was followed in the temperature range 750°–1200°C as a function of activation time. Reaction of celsian formation was followed using thermogravimetry as well as conventional and high-temperature X-ray diffractions. The obtained data show that reaction rate increases with prolonged activation time, under the same conditions of thermal treatment. Formation of hexacelsian was favoured with increasing activation time. Formation of monoclinic celsian was retarded, with longer activation.

Keywords

Crystallization Silicate Milling Thermogravimetry Orthosilicate 

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Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • S. Bošković
    • 1
  • Ð. Kosanović
    • 2
  • Ð. Bahloul-Hourlier
    • 3
  • P. Thomas
    • 3
  • Š. Kiš
    • 1
  1. 1.Institute of Nuclear Sciences-VinćaMat.Sci.Lab.BelgradeYugoslavia
  2. 2.Refractory Institute Magnohrom-KraljevoYugoslavia
  3. 3.Laboratory for Ceramic Materials and SurfaceTreatment of the Limoges UniversityFrance

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