Journal ArticleDOI
Water and its relation to broken bond defects in fused silica
R. H. Stolen,G. E. Walrafen +1 more
TLDR
In this paper, the effects of water and defects on the Raman spectrum of fused silica have been studied and it has been shown that water in the melt is preferentially trapped at the defect sites.Abstract:
We have studied the effects of water and defects on the Raman spectrum of fused silica Intensities of defect lines at 604 and 490 cm−1 were found to increase with fictive temperature and to decrease with increasing OH content The results suggest that water in the melt is preferentially trapped at the defect sites The increased sensitivity obtained by using an optical fiber as the sample enabled us to see for the first time the Si– (OH) stretching vibration at 970 cm−1 The Si–(OH) intensity agrees with that of the 1100 cm−1 dangling oxygen line in a silica fiber weakly doped with K2O A comparison with other spectral features shows that the Raman cross section for the Si–O stretch is extremely weak This weak cross section contributes to the weak Raman intensity of the 1100 cm−1 lines in both fused and crystalline SiO2 and also explains why the dangling oxygen stretching vibration is not observed by Raman scattering in neutron damaged silica Measurements of the much stronger 3690 cm−1 OH stretching viread more
Citations
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Journal Article
Structural studies of silicate glasses and melts—applications and limitations of Raman spectroscopy
TL;DR: Raman spectroscopy studies of alkali and alkaline earth silicate glasses and melts are reviewed, and the major Raman bands observed are summarized in this article, where a number of vibrational calculations have been carried out to address this problem.
Journal ArticleDOI
Sol-gel transition in simple silicates II☆
TL;DR: In this article, a range of conditions in which the rate of hydrolysis was varied from fast to slow with respect to condensation were discussed, and it was shown that higher temperatures were sufficient to densify fine gels by a process which was postulated to consist of polymer relaxation followed by condensation and pore collapse.
Journal ArticleDOI
Raman and infrared spectra on silica gel evolving toward glass
TL;DR: In this article, the infrared and Raman spectra of gels obtained from specially prepared solutions of Si(OC2H5)4 (TEOS) which have been thermally treated in the 40-800°C temperature range, are reported and discussed with reference to the spectrum of fused quartz, showing that the gel to glass transformation is an hydrolytic polycondensation process, which takes plase gradually and is practically completed in the samples treated at 800°C.
Journal ArticleDOI
Temperature dependence of the low‐ and high‐frequency Raman scattering from liquid water
TL;DR: In this article, Raman intensity data were obtained from liquid water between 3.5 and 89.3°C using holographic grating double and triple monochromators.
Journal ArticleDOI
Aluminum or phosphorus co-doping effects on the fluorescence and structural properties of neodymium-doped silica glass
TL;DR: In this paper, the effect of co-dopant oxide on the properties of SiO2 glass for a glass laser host was studied. And the effects of the Al dopant on the density and Raman spectra were also studied to obtain structural information.
References
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Book
The properties of glass
TL;DR: Morey as discussed by the authors argued that the soundest foundation for a strong industry is the understanding of its fundamental scientific principles, and the glass industry both in England and in the United States is to-day going ahead fast.