Scholarly record
SINTERED GLASS-CERAMIC AND COMPOSITES FROM MSW BOTTOM ASH
Abstract
The sintering and phase formation of glass press-powders, obtained after melting and re-melting of MSW bottom ash, were investigated by non-isothermal dilatometry and differential thermal analysis. Additionally, a series of composite materials, containing 20 vol \% corundum powders with different fraction size, were prepared and studied. The crystalline phases, formed at different temperatures, were evaluated by X-ray diffraction and the structure of glasses and final materials were observed by scanning electron microscopy. The parent MSW bottom ash glass has been characterized with formation of immiscible Fe-P-S phase, resulting in a low sinterability. After re-melting, however, the glass structure became homogeneous, the densification rate increased and sintered glassceramics with bending strength of 80±5 MPa and Young Modules of 74±3 GPa were obtained after 1 h holding at 900 °C. It was also demonstrated, that because of decreasing of the sintering rate and the degree of densification, the added reinforcement doesn’t improve the mechanical properties of the composites.
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