Alkali borosilicate glass by fly ash from a coal-fired power plant

Jong Soo Park, Shoji Taniguchi, Young Jun Park

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


The possibility of using coal fly ash as a silica source for alkali borosilicate glass was investigated. Alkali borosilicate glasses were prepared from the coal fly ash mixed with 30 wt.% reagents composed of Na2O and B2O3 by susceptor-induction heating. Their densities ranged from 2.24 to 2.55 g cm-3 and decreased as the amount of B2O3 addition increased. However, the Vickers microhardness showed a different tendency with the density since the glass network connectivity improved by boron anomaly, which was identified by a nuclear magnetic resonance analysis. The Vickers microhardness of the glass product, with the addition of 15 wt.% B2O3 and 15 wt.% Na2O, was about 4030 MPa. Furthermore, the changes in microstructure were consistent with those in the chemical stability by the toxicity characteristic leaching procedure (TCLP).

Original languageEnglish
Pages (from-to)320-324
Number of pages5
Issue number2
Publication statusPublished - 2009 Jan
Externally publishedYes


  • Alkali borosilicate glass
  • Boron anomaly
  • Coal fly ash
  • Induction-melting vitrification
  • MAS NMR spectroscopy

ASJC Scopus subject areas

  • Environmental Engineering
  • Chemistry(all)
  • Environmental Chemistry
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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