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Alumina-Carbon Refractory Castables Containing Calcium-Aluminate Coatings on Graphite

The densification behaviour of graphite-free and graphite-containing castable matrices has been characterized too by their thermal and thermomechanical characteristics up to 1500 °C. The role of coated graphite on improved performance of the refractory ceramics was explored by thermogravimetry, X-ray diffraction, microstructure and thermal
shock resistance studies. It is suggested that the hydrophilic thin film containing calcium aluminate phases encouraged graphite retention in castable matrix.


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