doiSerbia

Liquid phase sintering of dense and porous glass-ceramics from coal fly-ash and waste glass

Bossert J. (Friedrich Schiller University, Institute of Materials Science and Technology, Jena, Germany)
Fidancevska E. (Faculty of Technology and Metallurgy, University ²St Cyril and Methodius², Skopje, Republic of Macedonia)
Mangutova B. (Faculty of Technology and Metallurgy, University ²St Cyril and Methodius², Skopje, Republic of Macedonia)
Panova B. (Faculty of Technology and Metallurgy, University ²St Cyril and Methodius², Skopje, Republic of Macedonia)
Milosevski D. (Faculty of Technology and Metallurgy, University ²St Cyril and Methodius², Skopje, Republic of Macedonia)
Milosevski M. (Faculty of Technology and Metallurgy, University ²St Cyril and Methodius², Skopje, Republic of Macedonia)

Glass-ceramics were produced utilizing fly-ash from coal power stations and waste glass of TV monitors, windows and flask glass. The powder technology route was employed. The mixture of 50% fly ash and 50% waste TV glass increases the bending strength from 12±1 to 56±4 MPa and E-modulus from 6±1 to 26±3 GPa. Using polyurethane foam and C-fibers as pore creators porosity of 70±4 and 55±5 %, respectively, can be obtained-modulus and bending strength of the porous systems obtained by polyurethane foam and C-fibers was 2.7±0.5 GPa and 4.5±1 MPa and 7.1±1 GPa and 9.3±2 MPa respectively.

Keywords: waste, fly ash, glass-ceramic, sintering, porosity