Thermal analysis of reactions in soda-lime silicate glass batches containing melting accelerants: I, one- and two-component systems
- New York College of Ceramics at Alfred Univ., NY (United States)
To identify each glass melting reaction in a multicomponent system, one-component and two-component reaction processes were studied using DTA, TGA, and XRD. Two-component mixtures were prepared by choosing pairs in the same ratio as in a commercial container glass batch composition (sand-soda ash-calcite-dolomite-feldspar). The presence of silica in the silicia-calcite system decreased the termination temperature of the decomposition of calcite, but did not alter the onset of decomposition. Similar behavior was found in the dolomite-silica system. A double carbonate (Na[sub 2]Ca(CO[sub 3])[sub 2]) formed via solid-state reaction in the calcite-soda ash system, and metasilicate/disilicate phases were detected during the fusion process in the soda ash-silica system. The effects of reaction accelerant additions in the soda ash-silica system were investigated using 1 wt% additions of sodium sulfate, sodium nitrate, and sodium chloride. Sodium chloride was the most effective melting accelerant, lowering the termination temperature of CO[sub 2] release by [approximately]80C compared with the soda ash-silica system with no additives. NaCl additions caused complete reaction and/or fusion of Na[sub 2]CO[sub 3] prior to its melting temperature. Sodium sulfate additions acted to suppress metasilicate/disilicate formation by coating quartz grains and shifted consequent CO[sub 2] release to higher temperature.
- OSTI ID:
- 6049728
- 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
Similar Records
Study of cesium volatility from sodium carbonate based melts
Use of commercial limestone and other commercially available raw materials in the lime-soda sinter process for the extraction of alumina from a sub-bituminous western coal fly ash
Related Subjects
360601* -- Other Materials-- Preparation & Manufacture
ALKALI METAL COMPOUNDS
CALCITE
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COHERENT SCATTERING
DECOMPOSITION
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
DOLOMITE
FELDSPARS
GLASS
GRAVIMETRIC ANALYSIS
HEAT TREATMENTS
MELTING
MINERALS
NITRATES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
QUALITY ASSURANCE
QUANTITATIVE CHEMICAL ANALYSIS
SAND
SCATTERING
SILICATE MINERALS
SILICON COMPOUNDS
SILICON OXIDES
SODIUM CARBONATES
SODIUM COMPOUNDS
SODIUM NITRATES
SODIUM SULFATES
SULFATES
SULFUR COMPOUNDS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION