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Nucleation and Crystallization of New Glasses from Fly Ash Originating from Thermal Power Plants

AuthorsBarbieri, L.; Lancellotti, I.; Manfredini T.; Pellacani G.C.; Rincón López, Jesús María; Romero, Maximina
Issue DateAug-2001
PublisherJohn Wiley & Sons
CitationJournal of the American Ceramic Society, 84: 1851-1858 (2001)
AbstractThe nucleation and crystallization kinetics of new glasses obtained by melting mixtures of a Spanish carbon fly ash with glass cullet and dolomite slag at 1500°C has been evaluated by a calculation method. These glasses, whose microstructure was examined by TEM carbon replica, were susceptible to controlled crystallization in the 800°–1100°C range. The resulting glassceramics developed acicular and branched wollastonite crystals or a network of dendritic pyroxene mixed with anorthite feldspar (SEM and EDX analysis). The time–temperature– transformation curves (processing of the XRD data) showed the crystallization kinetics and the critical cooling rate to be in the 12°–42°C/min range.
Publisher version (URL)http//dx.doi.org/10.1111/j.1151-2916.2001.tb00926.x
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