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- W2105202541 abstract "A graphite chamber was used for the reaction between samples of 45 or 55 wt% alumina and a mixture of metallurgical coke and potassium carbonate. Thermal treatments were conducted at 1000°C. The results suggest that the potassium attack in silica-alumina bricks is controlled by the following reactions: K2O + SiO2→ K2O → SiO2 in the glassy matrix; 3(K2O · 2SiO2) + 3Al2O3→ 2SiO2· 3(K2O · Al2O3· 2SiO2) + 2SiO2 for short times; and K2O → Al2O3· 2SiO2+ 2SiO2· K2O · Al2O3· 4SiO2 for long times. In 55 wt% alumina bricks containing corundum and tridymite, potassium also attacks those phases forming a glassy phase. The formation of kaliophilite at the matrix/mullite grain interface causes a volumetric expansion of 55.5%, resulting in cracks in the matrix. Because the kaliophilite phase is not in equilibrion with mullite, the former will react with free silica to form leucite that is more thermodynamically stable." @default.
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- W2105202541 date "1990-05-01" @default.
- W2105202541 modified "2023-10-15" @default.
- W2105202541 title "Potassium Vapor Attack in Refractories of the Alumina-Silica System" @default.
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- W2105202541 doi "https://doi.org/10.1111/j.1151-2916.1990.tb05214.x" @default.
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