Thermal analysis of reactions in soda-lime silicate glass batches containing melting accelerants: II, multicomponent systems

Journal Article · Sun Feb 28 23:00:00 EST 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb03648.x· OSTI ID:6266298

Hong, Kug Sun; Lee, Sang Won; Speyer, R F ^[1]

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1. New York State College of Ceramics at Alfred Univ., NY (United States)

The glass melting reactions in a multicomponent system (sand-soda ash-calcite-dolomite-feldspar) were studied using data from DTA, TGA, and XRD interactively. The first-formed liquid phase occurred at 700C from eutectic melting among CaCO[sub 3], Na[sub 2]CO[sub 3], and MgO. Further liquid phase formed at the CaCO[sub 3]-Na[sub 2]CO[sub 3] eutectic at 785C and a fusion reaction among SiO[sub 2], CaO, and the molten phase at 812C. Reactions between molten soda ash and silica grains to form a sodium disilicate coating also occurred in this temperature range. The effects of reaction accelerant additions (Na[sub 2], SO[sub 4], NaNO[sub 3], NaCl) on batch fusion were analyzed. Sodium chloride was found to be the most effective melting accelerant due to the formation of a NaCl-Na[sub 2]CO[sub 3] eutectic liquid phase at [approximately]636C, which effectively attacked the silica relic. CO[sub 2] gas release terminated [approximately]80C earlier with 1 wt% NaCl additions to the base glass.

• OSTI ID: 6266298
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:3; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALKALI METAL COMPOUNDS
CALCITE
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
DOLOMITE
EUTECTICS
FELDSPARS
GLASS
GRAVIMETRIC ANALYSIS
HALIDES
HALOGEN COMPOUNDS
MELTING
MINERALS
NITRATES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
QUANTITATIVE CHEMICAL ANALYSIS
SAND
SCATTERING
SILICATE MINERALS
SODIUM CARBONATES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM NITRATES
SODIUM SULFATES
SULFATES
SULFUR COMPOUNDS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION