Статья

Vitrification of low silica fly ash: suitability of resulting glass ceramics for architectural or electrical insulator applications

Konstantinos C. VasilopoulosLaboratory of Physical Metallurgy, Department of Mechanical Engineering, Aristotle University of Thessaloniki, GR – 541 24 Thessaloniki, GreeceDilshat U. TulyaganovDepartment of Ceramics and Glass Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portuga; Scientific Research Institute of Space Engineering, 700128, Tashkent, UzbekistanSimeon AgathopoulosDepartment of Materials Science and Engineering, University of Ioannina, Greece, GR – 451 10 Ioannina, GreeceMichael A. KarakassidesDepartment of Materials Science and Engineering, University of Ioannina, Greece, GR – 451 10 Ioannina, GreeceM.J. RibeiroUIDM, ESTG, Polytechnic Institute of Viana do Castelo, 4900 Viana do Castelo, PortugalJ.M.F. FerreiraDepartment of Ceramics and Glass Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, PortugaΔ. ΤσιπάςLaboratory of Physical Metallurgy, Department of Mechanical Engineering, Aristotle University of Thessaloniki, GR – 541 24 Thessaloniki, Greece

2008en

ABI

Аннотация

The study concerns the recycling of the fly ash (FA) derived from the thermal power stations of Ptolemaida (Greece) and its potential use of this FA as precursor in production of bulk nucleated GCs. The first attempt was addressed to produce a glass from the fine powder of as received FA without any additives. To overcome some drawbacks such as spontaneous crystallisation upon cooling of FA based glass and to improve its working properties, production of pyroxene based glasses from FA was undertaken. The parent glass approached the composition of CaMg0⋅75Al0⋅4Fe0⋅1Si1⋅75O6, derived from CaMg0⋅75Al0⋅5Si1⋅75O6, which belongs to diopside–Ca-Tschermak solid solutions. Cr2O3 nucleated fine grained mono mineral glass ceramics of augite were produced from the glasses comprising FA and additives of SiO2, Al2O3 and MgCO3. The influence of Cr2O3 content on the development of crystalline phases, the properties and the microstructure of the resultant glass ceramics crystallised at different temperatures was investigated.

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Идентификаторы

DOI: 10.1179/174367509x344980

Цитирования и источники

Цитирований: 2Использованных источников: 0

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