Assignment of Infra-red Reflection Spectra Resulted from Phase Separation of Silicate Glass

Abstract

The assignment of infra-red reflection spectra resulted from phase separation of silicate glass and borosilicate glass were studied.
The results obtained were as follows:
1) The main peak due to Si-O-Si bond shifted to higher wavenumber by the change of glass state from homogeneous phase to a separated state phase in indentical composition of silicate glass. Another peak of about 1200cm^-1 wavenumber due to Si-O-Si bond also shifted to higher wavenumber and its peak sharpened.
2) The shoulder height at lower wavenumber side of the main peak increased with phase separation in the particular glass composition. Its shoulder peak considered was due to Si-O-Si bond in one of the two phase separated glasses. It was considered that, that glass phase had higher network modifier cation content than that of the other glass phase.
3) The peaks of about 1150cm^-1 and 1220cm^-1 wavenumber resulted from phase separation of borosilicate glasses. These peaks were assigned to _??_B-O-^|Si_| bond, and _??_B-O-B_??_ bond, respectively.