Utilization of coal-ash minerals for technological ceramics

B. Cumpston, Farhang Shadman, S. Risbud

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Glasses synthesized from Utah bituminous coal-ash melts were crystallized to form glass ceramics to determine the feasibility of coal-ash utilization. The use of additives to promote glass formation and catalysts to serve as nucleation sites for crystallization was studied. The microstructure of the crystalline phase was investigated using X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. The bulk glasses and glass-ceramics were evaluated by Knoop microhardness and density measurements. The crystalline phase formed has been identified as anorthite, CaAl2Si2O8. Crystallization of the ash was possible up to a maximum of approximately 40%. The use of TiO2 as a nucleation catalyst did little to improve the degree of crystallinity; however, the crystal phase became better defined when this catalyst was used, even in small amounts.

Original languageEnglish (US)
Pages (from-to)1781-1784
Number of pages4
JournalJournal of Materials Science
Volume27
Issue number7
DOIs
StatePublished - Apr 1992

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Coal Ash
ashes
coal
Coal ash
Minerals
minerals
Glass ceramics
ceramics
Crystallization
Ashes
Glass
Catalysts
glass
Nucleation
Crystalline materials
catalysts
Coal
Bituminous coal
Microhardness
nucleation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)

Cite this

Utilization of coal-ash minerals for technological ceramics. / Cumpston, B.; Shadman, Farhang; Risbud, S.

In: Journal of Materials Science, Vol. 27, No. 7, 04.1992, p. 1781-1784.

Research output: Contribution to journalArticle

Cumpston, B. ; Shadman, Farhang ; Risbud, S. / Utilization of coal-ash minerals for technological ceramics. In: Journal of Materials Science. 1992 ; Vol. 27, No. 7. pp. 1781-1784.
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