• Lucian Paunescu Cosfel Actual SRL Bucharest
  • Sorin Mircea Axinte Daily Sourcing & Research SRL Bucharest
Keywords: coal fly ash, compression resistance, expanded glass, residual glass, microwave warming, silicon carbide


Glass-ceramic foam was produced from residual glass (87.6-87.9 %), coal fly ash (8.5-10 %), silicon carbide (2-3 %), and kaolin (0.4-0.6 %) by sintering at 950-975 ºC. The heating technique was original, being used the preponderantly direct warming procedure using electromagnetic waves. The glass-ceramic foam had the following characteristics: apparent specific gravity between 0.22-0.28 g/cm3, porousness between 86.7-89.5 %, thermal conductance in the range 0.055-0.065 W/m·K, compression resistance between 1.8-2.5 MPa, water absorption below 1.2 vol. %, and pore dimension under 1 mm. The specific electricity consumption had very low values (between 0.75-0.83 kWh/kg). The application field of the product includes thermal insulation materials for construction, architectural components and other applications that do not require resistance to high mechanical stress.


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How to Cite
Paunescu, L., & Axinte, S. (2022). EXPANDED GLASS BY A NONCONVENTIONAL MICROWAVE HEATING TECHNIQUE FROM RESIDUAL GLASS. Nonconventional Technologies Review, 26(3). Retrieved from http://revtn.ro/index.php/revtn/article/view/380

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