Structures and optical properties of tellurite glasses and glass ceramics

作者: Robert Theodore Hart Jr

DOI:

关键词:

摘要: The structures and optical properties of (K 2 O) 15 (Nb 2 O 5) 15 (TeO 2) 70 glass and glass ceramic have been studied in order to understand the second harmonic generation observed from the glass ceramic. We have used 93 Nb NMR, Raman spectroscopy, differential scanning calorimetry, small angle x-ray scattering, transmission electron microscopy, and powder x-ray and neutron scattering. We find that there is a microstructure consistent with binodal phase separation leading to spherical inclusions∼ 20 nm in size. Upon heat treatment, these domains become nanocrystals of K 2 Te 4 O 9. A theory of optical heterogeneity is used to describe the observed second harmonic generation which is∼ 95 times more intense that quartz. The χ (2) value for this material is 3.0× 10− 9 esu.

参考文章(0)