Synthesis and properties of flux-cast refractories in the Al2O3-MgO-B2O3 system |
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Authors: | V. A. Sokolov T. Ya. Malysheva M. D. Gasparyan |
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Affiliation: | (1) Moscow State Steel and Alloys Institute, and Bakor Scientific Company, Moscow, Russia |
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Abstract: | Details are given of the synthesis and testing of flux-cast refractory materials in the alumina-rich region of the Al2O3-MgO-B2O3 system; XRD and petrography indicate that the main structure-forming phases are corundum and magnesian spinel. In subordinate amounts there are the boroaluminate 9Al2O3·2B2O3 and the previously unknown compound 4Al2O3·MgO·2B2O3, whose composition has been established by microprobe analysis. Corrosion tests showed that three-component systems containing magnesium and boron oxides at levels of 5–10% do not increase the corrosion resistance of refractories in molten sodium-calcium-silicate glass and electrovacuum borosilicate glass. __________ Translated from Novye Ogneupory, No. 3, pp. 161–163, March, 2008. |
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