Infrared Absorption Coefficients of Silica Glasses

The absorption coefficient values of several silicate glasses in the IR radiation range were determined. Four methods were employed in this study: (1) direct transmission by CO2 laser, (2) direct transmission through ultrathin sections using an IR spectrometer, (3) glass particle dispersions in KBr...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1992-01, Vol.75 (1), p.209-212
Main Authors: Sahba, Nazanin, Rockett, Thomas J.
Format: Article
Language:English
Subjects:
absorption
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
glass
infrared
Infrared and raman spectra and scattering
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Physics
silicates
transmission
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Summary:The absorption coefficient values of several silicate glasses in the IR radiation range were determined. Four methods were employed in this study: (1) direct transmission by CO2 laser, (2) direct transmission through ultrathin sections using an IR spectrometer, (3) glass particle dispersions in KBr pressed pellets, and (4) IR reflection spectral analysis. Wide variations in values were observed for some of these techniques. The reasons for the variations were explored, and evidence is presented to support the conclusion that the reflection measurements and the low‐power transmission technique yield accurate values. The pellet technique was found to possess too many experimental variables which could not be controlled and gave erroneous data. The damage produced by direct transmission of high‐power radiation was severe and introduced effects which gave spurious results.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1992.tb05468.x