MINERALIZING SPINEL FORMATION WITH B_2O_3

摘要

B_2O_3 is known to encourage low temperature reaction between MgO and Al_2O_3 to form in situ magnesium aluminate spinel in refractories matrix systems. XRD indicates that B_2O_3 mineralizes spinel formation at 1100°C. However, the spinel content does not increase with increased B_2O_3 content. ~(11)B MAS-NMR and XRD indicate that the mineralizing mechanism involves a boron containing glassy phase. This paper discusses the effect of different levels of B_2O_3 addition on spinel formation.