Several kinds of wastes have been converted into glasses, successively powdered and sintered with simultaneous crystallisation. The employed “sinter-crystallisation” process was useful to obtain glass-ceramics with particular crystal phases (sometimes un-accessible from traditional nucleation/crystal growth treatments, like feldspar crystals). Conventional pressing of fine glass powders led to monoliths, after sintering, with remarkable mechanical properties (for example bending strength exceeding 100 MPa), useful for tile applications; replication processes, by employing sacrificial polymeric materials, after the same thermal treatment employed for the monoliths, led to open-celled glass-ceramic foams, useful for filtering applications. The enhanced specific surface due to porosity was found to have a positive effect on crystallisation.

Monolithic and cellular sintered glass-ceramics from wastes

BERNARDO, ENRICO;SCARINCI, GIOVANNI;
2006

Abstract

Several kinds of wastes have been converted into glasses, successively powdered and sintered with simultaneous crystallisation. The employed “sinter-crystallisation” process was useful to obtain glass-ceramics with particular crystal phases (sometimes un-accessible from traditional nucleation/crystal growth treatments, like feldspar crystals). Conventional pressing of fine glass powders led to monoliths, after sintering, with remarkable mechanical properties (for example bending strength exceeding 100 MPa), useful for tile applications; replication processes, by employing sacrificial polymeric materials, after the same thermal treatment employed for the monoliths, led to open-celled glass-ceramic foams, useful for filtering applications. The enhanced specific surface due to porosity was found to have a positive effect on crystallisation.
2006
Advances in Science and Technology Vol. 45
CIMTEC 2006 - 11th International Ceramic Congress & 4th Forum on New Materials
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/1555354
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