Effects of Na2O on Borosilicate Glasses Prepared from Coal Fired Ash

W. Rachniyom; Yotsakit Ruangtaweep; J. Kaewkhao; S. Ruengsri; K. Phachana

doi:10.4028/www.scientific.net/AMR.979.271

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 979Effects of Na2O on Borosilicate Glasses Prepared...

Effects of Na₂O on Borosilicate Glasses Prepared from Coal Fired Ash

Abstract:

In this work, subbitumious fly ash in Thailand was sintered at different temperatures and analyzed for their compositions and crystal structures. Glasses were prepared from B₂O₃ mixed with subbitumious fly ash and additive Na₂O in various concentrations. The results have shown that SiO₂, Al₂O₃ and Fe₂O₃ are the major compositions of the fly ash. The crystal structures of fly ash at sintering temperature below to 800 0C are mullite and quartz with the occurrence of hematite phase at 1,000 0C. The density, reflective index and hardness values were found to increase with the increasing of Na₂O concentration. The absorption spectra corresponded to the color of the glass (yellow to brown). The higher the Na₂O concentration is, the lighter the color of the glasses. The results from this work demonstrated the possibility of glass production from subbitumious fly ash and utilization of industrial waste in Thailand.

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Periodical:

Advanced Materials Research (Volume 979)

Pages:

271-274

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.979.271

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Online since:

June 2014

Authors:

W. Rachniyom*, Yotsakit Ruangtaweep, J. Kaewkhao, S. Ruengsri, K. Phachana

Keywords:

Alkali Borosilicate Glass, Coal Fly Ash, Recycling

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