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

abstract

Cr(2)O(3)-nucleated fine grained mono-mineral glass-ceramics of augite were produced from low-silica fly ash and additives of SiO(2), Al(2)O(3) and MgCO(3), via two steps of heat treatment for nucleation and crystal growth. The starting glass approached the composition of CaMg(0.75)Al(0.4-)Fe(0.1)Si(1.75)O(6), derived from CaMg(0.75)Al(0.5)Si(1.75)O(6), which belongs to diopside - Ca-Tschermak solid solutions. The influence of Cr(2)O(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. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

keywords

BLAST-FURNACE SLAG; CRYSTALLIZATION BEHAVIOR; SYSTEM; CR2O3; WASTES

subject category

Materials Science

authors

Vasilopoulos, KC; Tulyaganov, DU; Agathopoulos, S; Karakassides, MA; Ferreira, JMF; Tsipas, D

our authors

acknowledgements

Konstantinos Vasilopoulos acknowledges the financial support of the Hellenic Ministry of National Education via the project

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