Valoxy, an alumina-rich waste, was mixed with borosilicate glass (BSG) powder in 10, 20, and 30 wt% concentrations. Sintering was carried out at 850 and 950 degrees C for 30min. Glass-ceramics (GC) were characterized by X-ray diffraction analysis and scanning electron microscopy. Diametral compression strength (DCS) tests were performed on sintered samples before and after thermal shock. GC samples containing calcined Valoxy showed superior properties in all compositions and processing temperatures compared with samples containing as-received Valoxy. Maximum density of 2.2g/cm(3), water absorption below 1wt% and DCS of 24MPa were measured for 10wt% calcined Valoxy+BSG GC composites sintered at 850 degrees C.
Glass-ceramic composites from borosilicate glass and alumina-rich residues
BERNARDO, ENRICO;
2015
Abstract
Valoxy, an alumina-rich waste, was mixed with borosilicate glass (BSG) powder in 10, 20, and 30 wt% concentrations. Sintering was carried out at 850 and 950 degrees C for 30min. Glass-ceramics (GC) were characterized by X-ray diffraction analysis and scanning electron microscopy. Diametral compression strength (DCS) tests were performed on sintered samples before and after thermal shock. GC samples containing calcined Valoxy showed superior properties in all compositions and processing temperatures compared with samples containing as-received Valoxy. Maximum density of 2.2g/cm(3), water absorption below 1wt% and DCS of 24MPa were measured for 10wt% calcined Valoxy+BSG GC composites sintered at 850 degrees C.
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