TY - JOUR
T1 - Alkali borosilicate glass by fly ash from a coal-fired power plant
AU - Park, Jong Soo
AU - Taniguchi, Shoji
AU - Park, Young Jun
N1 - Funding Information:
This work was financially supported by the following funds: (NEDO-06001439-0), Hokuriku Electric Power Company & New Energy and Industrial Technology Development Organization in Japan; (KRF-2005-215-D00177), Korea Research Foundation Grant funded by the Korea government; “Construction of the World Center on Electromagnetic Processing of Materials”, JSPS Asian Core Programs.
PY - 2009/1
Y1 - 2009/1
N2 - 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).
AB - 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).
KW - Alkali borosilicate glass
KW - Boron anomaly
KW - Coal fly ash
KW - Induction-melting vitrification
KW - MAS NMR spectroscopy
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U2 - 10.1016/j.chemosphere.2008.08.044
DO - 10.1016/j.chemosphere.2008.08.044
M3 - Article
C2 - 18951607
AN - SCOPUS:56549130209
VL - 74
SP - 320
EP - 324
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
IS - 2
ER -