Glass property calculations and prediction of new compounds on the basis of raman spectroscopy of borate glasses
Authors: Markova, Tatiana S.; Yanush, Oleg V.; Polyakova, Irina G.; Pevzner, Boris Z.
Source: Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B, Volume 47, Number 4, August 2006 , pp. 476-483(8)
Publisher: Society of Glass Technology
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Abstract:
Structural studies of B2O3-BaO-Al2O3 glasses and crystals have been carried out by Raman spectroscopy to investigate interaction of initial oxides resulted in so-called constant stoichiometry groupings (CSG) formation. The Raman spectra of glasses are interpreted as the superposition of relatively small numbers of unchangeable spectral forms belonging to CSG. The composition dependences of CSG mole fractions afford an opportunity to explain, calculate and predict dependences of refractive index, density, structural thermal expansion coefficient, the fraction of four coordinated borons and other properties of barium aluminoborate, Na2O-B2O3, and Sb2O5-B2O3 glasses in agreement with experimental data. The Raman spectra analysis developed enabled us to predict the existence of unknown compounds Na2O.8B2O3, Na2O.4SiO2 and others, which have been discovered now. Based on the measured Raman spectra we have proposed an explanation, which is able to predict the Boson peak frequency and its intensity correlations with the glass transition temperature. This prediction gives excellent agreement with the experimentally obtained data in B2O3-BaO, Na2O-B2O3, and PbO-GeO2 glasses.Document Type: Research article
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