Structure and Raman spectra of glasses containing several glass-forming oxides and no glass-modifying oxide

Abstract

Binary glasses containing no modifying oxides, such as SiO 2GeO 2, SiO 2B 2O 3, SiO 2P 2O 5, GeO 2B 2O 3, Al 2O 3P 2O 5 and ternary glasses SiO 2GeO 2P 2O 5, Al 2O 3B 2O 3P 2O 5, B 2O 3SiO 2P 2O 5, Al 2O 3ZrO 2P 2O 5 have been prepared by melting and CVD methods. The Raman spectra have also been measured. Structural characteristics of SiO 2, GeO 2, B 2O 3, P 2O 5 in different glass systems are analysed. There exist coordination number changes in B 2O 3- and GeO 2-containing glasses and linkage changes between tetrahedra (SiO 4) and (PO 4) in SiO 2 and P 2O 5 containing glasses. The structure of Al 2O 3 containing glasses is homogeneous and the structure of B 2O 3 containing glasses is inhomogeneous. These experimental results are in coincidence with the X-ray small angle scattering analysis.