Glass‐forming region and high refractive index of TiO₂‐based glasses prepared by containerless processing

TiO 2 ‐based high‐refractive‐index glasses without any network former oxides were fabricated by containerless processing in an aerodynamic levitation furnace. The glass‐forming region of a BaO‐LaO 3/2 ‐TiO 2 ternary system was determined. Moreover, the glass transition and crystallization temperatures of a (La 1− x Ba x ) 4 Ti 9 O 24 glass system and a LaO 3/2 ‐TiO 2 ‐ M O x ternary system ( M = Ga, Y, Gd, Hf, W, Zn Ge, Nb, Ta, Bi, and Ba) were obtained. Finally, the refractive index dispersion of LaO 3/2 ‐TiO 2 ‐ M O x ( M = Ga, W, and Gd) was also investigated. The results indicate that these glasses are promising materials for future optical applications in the visible region. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)