THE DE-VITRIFICATION OF ALUMINO-SILICATE CERAMIC FIBRE MATERIALS-THE KINETICS OF THE FORMATION OF DIFFERENT CRYSTALLINE PHASES

摘要

The steel industry makes extensive use of alumino-silicate fibre products, particularly as linings in high temperature furnaces, where their outstanding heat insulation properties confer substantial energy conservation benefits. These products can have a range of compositions, and the fibre may be initially in a crystalline and/or amorphous material. De-vitrification may occur during the normal service life of the product and the crystalline phases formed may create health hazards during furnace relining operaticns. There is therefore a need both to characterise these fibres in terms of their rate of de-vitrification and the component phases that are formed.