Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 6, Pages 8697-8706Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.11.103
Keywords
Furnace bottom ash; Glass; Porous ceramic; Ceramic foams; Direct foaming; Biofilters
Categories
Funding
- EPSRC [EP/R010161/1]
- UKCRIC Coordination Node, EPSRC [EP/R017727/1]
- EPSRC [EP/R017727/1, EP/R010161/1] Funding Source: UKRI
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This research produced foamed glass-ceramics from coal fired power station furnace bottom ash and soda-lime-silica glass, exploring the effects of different additives on the fabrication process and properties, and discussing a range of potential applications for the materials.
This research has produced foamed glass-ceramics from coal fired power station furnace bottom ash (FBA) and soda-lime-silica glass. The as-received FBA was wet milled with different additions of glass. The resultant slurry was dried and formed into a powder. The powder was pressed and sintered at a range of temperatures with additions of a fluxing agent (sodium tetraborate decahydrate), a bubble stabilising additive (trTsodium phosphate) and a bloating agent (calcium carbonate) and this produced foamed FBA-glass-ceramics. The effect of glass content and sintering temperature on the properties of the sintered ceramic foams are reported. A range of potential applications including thermal insulation and biological filters for water and wastewater treatment are discussed. The research demonstrates that it is possible to engineer the properties of FBA derived glass-ceramic foams by careful control of the composition and processing conditions in order to transform a problematic waste into commercially interesting materials.
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