無容器法により作製した BaTi2O5 ガラスの構造および物性

抄録

BaTi2O5 spherical glasses were prepared using a containerless processing with an aerodynamic levitation furnace. The BaTi2O5 glasses were found to demonstrate some attractive physical properties e.g., giant dielectric response accompanied with crystallizations of two metastable phases, high transparency in visible and mid-infrared region, high refractive index with low abbe number, and high solubility of rare earth ions. We attribute these properties to the unusual local structure of the BaTi2O5 glass consisted of edge- or corner- shared distorted TiO5 polyhedra. In this paper, we report recent research progress on the BaTi2O5 glasses.