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Preparation of oxynitride glasses from woody biofuel ashes.
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Glass group)
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Glass group)
2010 (English)In: Journal of Non-Crystalline Solids, ISSN 0022-3093, E-ISSN 1873-4812, Vol. 356, no 50-51, 2774-2777 p.Article in journal (Refereed) Published
Abstract [en]

Oxynitride glasses have been prepared by melting woody biofuel ash from a power plant in south Sweden with addition of calcium metal as an extra modifier in a nitrogen atmosphere at 1350–1500 °C. The glasses were characterized by X-ray powder diffraction, differential thermal analysis and scanning electron microscopy. Cation and anion glass compositions were determined by energy dispersive X-ray analysis and combustion analysis, respectively. The glasses were found to be homogenous, translucent gray to black, and to contain up to 23 e/o of calcium and 5 e/o of nitrogen. The glass formation depends on the ratio of calcium metal introduction to the ash precursors. A strong exothermic reaction was observed at 650–850 °C, leading to the formation of amorphous and crystalline oxynitride phases that melt at high temperatures upon further heating. The glass densities vary between 2.76 g/cm3 and 2.92 g/cm3. The glass transition temperature was found to vary from 670 °C to 749 °C and increase linearly with the nitrogen content.

Place, publisher, year, edition, pages
2010. Vol. 356, no 50-51, 2774-2777 p.
National Category
Engineering and Technology
Research subject
Technology (byts ev till Engineering), Glass Technology
Identifiers
URN: urn:nbn:se:lnu:diva-10103DOI: 10.1016/j.jnoncrysol.2010.09.071OAI: oai:DiVA.org:lnu-10103DiVA: diva2:388490
Available from: 2011-01-17 Created: 2011-01-17 Last updated: 2015-08-31Bibliographically approved

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Citation style
  • apa
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  • vancouver
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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  • asciidoc
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