JOURNAL OF THE KOREAN CERAMIC SOCIETY, v.40, no.11, pp.7 - 1084
Abstract
In order to develop a new type of nonlinear optical materials or photocatlaysts, Na2O-Nb2O5-TeO2 glasses were prepared using conventional melt quenching method, and the crystallization behaviors and optical properties of these glasses was investigated. The optical and physical properties for Na2O-Nb2O5-TeO2 glasses are: refractive index, n=2.04±0.04; density, ρ(g/cm3)=4.87±0.58; optical energy band of the transmission cut-off wavelength, E0(eV)=3.14±0.04. The transparent glass ceramics consisting of the nano-crysatls were obtained when the Na2O-Nb2O5-TeO2 glass was first heat-treated at 350℃ for 1h and than at 400℃ for 1h. A cubic crystalline phase consisting of the nano-crysatls transforms into a stable phase at temperature above 470℃ for 1h