Conversion of blast furnace slag into new glass-ceramic material

The devitrification behavior of different sizes of slag-derived glass was investigated using differential thermal analysis, X-ray diffraction and scanning electron microscopy to determine the possibility of preparing glass-ceramic materials. The crystalline phases were identified as gehlenite, diops...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2004-08, Vol.24 (9), p.2819-2824
Main Author: Francis, A.A.
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
Cross-disciplinary physics: materials science
rheology
Devitrification
Exact sciences and technology
Glass ceramics
Glass-based composites, vitroceramics
Glasses
Materials science
Other industrial wastes. Sewage sludge
Other materials
Physics
Pollution
Slag
Specific materials
Waste material
Wastes
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Summary:The devitrification behavior of different sizes of slag-derived glass was investigated using differential thermal analysis, X-ray diffraction and scanning electron microscopy to determine the possibility of preparing glass-ceramic materials. The crystalline phases were identified as gehlenite, diopside pyroxene and barium aluminium silicate. The degree of crystallization was determined by evaluation the changes of density at different temperatures where a maximum density was achieved at 900 °C. A remarkable difference in the glass-ceramic texture was observed by treating the sample at different crystallization temperatures. Both acicular and dendritic morphology have been identified in the sample heat-treated at 1050 °C. A slight variation in peak crystallization temperature with particle size indicated a bulk crystallization mechanism.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2003.08.019