Optical properties and glass-forming region of the K2O-Sm2O3-TeO2 glass system

摘要

The optical properties and the glass-forming region of the K2O-Sm2O3-TeO2 glass system are studied. In the K2O-Sm2O3-TeO2 system, only the 5K(2)O-5Sm(2)O(3)-90TeO(2) composition gives a transparent glass. The refractive index, n, and the optical band-gap energy, E (g) , of the 5K(2)O-5Sm(2)O(3)-90TeO(2) glass are n = 2.04 +/- 0.003 and E (g) = 3.2 eV, respectively. A single Sm2Te6O15 phase is found to be formed by a two-step thermal treatment process at 370 A degrees C for 5 h and 390 A degrees C for 5 h. This is the first report on the crystallization and the preparation of the K2O-Sm2O3-TeO2 glass system.