Anomalous crystallization behavior of strontium titanate aluminosilicate glass-ceramics

Abstract The crystallization of glasses with a nominal composition consisting of 65 wt% SrTiO 3 , 29 wt% SiO 2 , and 6 wt% Al 2 O 3 , were investigated. Two glass batches of this composition, prepared from different chemicals and similar processing conditions, resulted in glass-ceramics with very different crystalline phases. One glass batch resulted in glass-ceramics with perovskite SrTiO 3 as the primary crystalline phase, while the second glass batch resulted in glass-ceramics with fresnoite Sr 2 TiSi 2 O 8 as the primary crystalline phase. The different crystallization sequences of glass-ceramics of the two glass batches were traced to differences between the first phases to crystalline from each glass. The crystallization behavior of these glass-ceramics was further complicated by the presence of several unidentified phases.