Double-layer waste-derived glass-ceramics prepared by low temperature sintering/sinter-crystallisation. (2nd October 2016)

• Record Type: Journal Article
• Authors: Marangoni, M.; Ponsot, I.; Cicek, B.; Bernardo, E.
• Is Part Of: Advances in applied ceramics. Volume 115:Number 7(2016)
• Page Start: 427
• Page End: 434
• Publication Date: 2016-10-02
• Subjects: Glass-ceramic -- Waste -- Viscous flow sintering -- Sinter-crystallisation; Ceramics -- Periodicals; 620.1405
• DOI: 10.1080/17436753.2016.1173792
• Languages: English
• ISSNs: 1743-6753

Abstract

Abstract : Lightweight glass-ceramics with a dense surface layer were produced by a novel sintering approach. The surface porosity of a glass-ceramic body from the direct sintering of an engineered mixture of fly ash from thermal power plants, recycled soda-lime glass and boron waste (residues of the mining and purification of valuable boron containing minerals) was sealed by a glaze, deriving from the sinter-crystallisation of glass powders produced from the same mixture. The use of boron waste, providing B2 O3, allowed a substantial viscous flow, for the substrate, even at the relatively low temperature (850–950°C) adopted for a single firing treatment (simultaneous sintering of substrate and sinter-crystallisation of glaze). The dense sinter-crystallised layer, besides imparting improvements in the mechanical properties, was found to feature an enhanced chemical stability.