The nucleation and crystallization kinetics of new glasses obtained by melting mixtures of a Spanish carbon fly ash with glass cullet and dolomite stag at 1500 degreesC 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 degrees -1100 degreesC range. The resulting glass-ceramics 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 degrees -42 degreesC/min range.

Nucleation and crystallization of new glasses from fly ash originating from thermal power plants / Barbieri, Luisa; Lancellotti, Isabella; Manfredini, Tiziano; Pellacani, Gian Carlo; Jm, Rincon; M., Romero. - In: JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - ISSN 0002-7820. - STAMPA. - 84 [8](2001), pp. 1851-1858.

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