Glass and Glass-Ceramics Produced from Fly Ash and Boron Waste

E. Ercenka, U. Sena, G. Bayrakb and S. Yilmaza aSakarya University, Engineering Faculty, Department of Metallurgical and Materials Engineering, Esentepe Campus, 54187 Sakarya, Turkey bSakarya University, Vocational School of Arifiye, Machinery and Metal Technology Department, 54580 Sakarya, Turkey

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In the current study, the effect of boron waste addition on some properties of fly ash based glass and glass-ceramics were investigated. The powder compositions including 10, 30, and 50 wt% boron waste was prepared. All the investigated compositions were melted at 1500°C by using electrical furnaces. Melting structures were cast into the graphite mold. Thus, fly ash-boron waste based glass materials were produced. To transform: the glass-ceramic, crystallization process was performed. Crystallization and glass-transition temperatures were determined by differential thermal analysis. Highly dense and crystalline materials, predominantly composed of diopside and augite together with tincalconite and residual glassy phase, were detected by X-ray diffraction analysis after heat treatment at 800, 900, and 1000°C for 1 h. For the glass and glass-ceramic samples, mechanical tests such as hardness and fracture toughness were realized. A boron waste addition has a positive effect on the hardness of the specimens unlike the fracture toughness results. Furthermore, produced glass-ceramic materials were characterized via scanning electron microscopy.

DOI: 10.12693/APhysPolA.125.626 PACS numbers: 61.43.Fs, 64.70.P-, 61.05.cp, 81.70.Pg, 62.20.Qp