title: Sintered glass ceramic composites from vitrified municipal solid waste bottom ashes.
abstract: A glass ceramic composite was obtained by sinter-crystallisation of vitrified municipal solid waste bottom ashes with the addition of various percentages of alumina waste. The sintering was investigated by differential dilatometry and the crystallisation of the glass particles by differential thermal analysis. The crystalline phases produced by the thermal treatment were identified by X-ray diffraction analysis. The sintering process was found to be affected by the alumina addition and inhibited by the beginning of the crystal-phase precipitation. Scanning electron microscopy was performed on the fractured sintered samples to observe the effect of the sintering. Young's modulus and the mechanical strength of the sintered glass ceramic and composites were determined at different heating rates. The application of high heating rate and the addition of alumina powder improved the mechanical properties. Compared to the sintered glass ceramic without additives, the bending strength and the Young's modulus obtained at 20 degrees C/min, increased by about 20% and 30%, respectively.
authors.affiliation: Department of Chemistry, Chemical Engineering and Materials, University of L'Aquila, Monteluco di Roio 67040, Italy.
authors.forename: Mirko
authors.initials: M
authors.lastname: Aloisi
authors.forename: Alexander
authors.initials: A
authors.lastname: Karamanov
authors.forename: Giuliana
authors.initials: G
authors.lastname: Taglieri
authors.forename: Fabiola
authors.initials: F
authors.lastname: Ferrante
authors.forename: Mario
authors.initials: M
authors.lastname: Pelino
mesh_terms: D000537:Aluminum Oxide; D002516:Ceramics; D005898:Glass; D015386:Hazardous Substances; D007220:Industrial Waste; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D015386:Hazardous Substances; D007220:Industrial Waste; D000537:Aluminum Oxide