Bulk nucleated fine grained mono-mineral glass-ceramics from low-silica fly ash

Bulk nucleated fine grained mono-mineral glass-ceramics from low-silica fly ash

Cr 2O 3-nucleated fine grained mono-mineral glass-ceramics of augite were produced from low-silica fly ash and additives of SiO 2, Al 2O 3 and MgCO 3, via two steps of heat treatment for nucleation and crystal growth. The starting glass approached the composition of CaMg 0.75Al 0.4Fe 0.1Si 1.75O 6,...

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Veröffentlicht in:Ceramics international 2009-03, Vol.35 (2), p.555-558
Hauptverfasser: Vasilopoulos, K.C., Tulyaganov, D.U., Agathopoulos, S., Karakassides, M.A., Ferreira, J.M.F., Tsipas, D.
Format: Artikel
Sprache:eng
Schlagworte:
A. Grain growth
B. Grain size
D. Glass
D. Glass-ceramics
Fly ash
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Beschreibung
Zusammenfassung:Cr 2O 3-nucleated fine grained mono-mineral glass-ceramics of augite were produced from low-silica fly ash and additives of SiO 2, Al 2O 3 and MgCO 3, via two steps of heat treatment for nucleation and crystal growth. The starting glass approached the composition of CaMg 0.75Al 0.4Fe 0.1Si 1.75O 6, derived from CaMg 0.75Al 0.5Si 1.75O 6, which belongs to diopside – Ca-Tschermak solid solutions. The influence of Cr 2O 3 (up to 0.75 wt.%) on the development of crystalline phases, the properties and the microstructure of the resultant glass-ceramics crystallized at different temperatures was investigated.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2008.01.002