Glass Formation in LaO 3/2 – TiO 2 Binary System by Containerless Processing

Using containerless processing with an aerodynamic levitation furnace, LaO 3/2 – TiO 2 binary glasses were synthesized in bulk form. Glass‐forming region was found in the vicinity of eutectic point, which is approximately 29.5% LaO 3/2 and 70.5% TiO 2 in molar ratio. The glass transition temperature T g and the crystallization onset temperature T x of the obtained glasses were determined by differential scanning calorimetry. The thermal stability was evaluated by Δ T (= T x − T g ). Our experimental results were compared with phase diagram of the LaO 3/2 – TiO 2 binary system. Glass compositions with highest Δ T corresponded to single‐phase compound of La 4 Ti 9 O 24 and the eutectic point.