Structure-Property Relations in Barium Borate Glasses from Raman Scattering Data

Abstract

Glasses in the x BaO-(100x )B 2 O 3 system ( x = 16-50 mol %) are investigated by Raman spectroscopy. The spectral forms of stoichiometric groupings are separated from the experimental Raman spectra. The diagram of the content of these groupings in glasses is constructed. The diagram obtained makes it possible to calculate the densities, refractive indices, temperature coefficients of linear expansion, and fractions of fourfold-coordinated boron atoms with the use of the experimentally determined partial properties of the groupings. It is revealed that the dependences of the boson peak intensity, the boson peak frequency, and the glass transition temperature on the composition of glasses in the barium borate system correlate with each other.

Coordination state of aluminum and boron in barium aluminoborate glass

“…According to our data, the concentration of the BO 4 tetrahedrons is 44 ± 4% in the binary barium diborate glass. This value is in good compliance with the data of other authors obtained by IR [13] and Raman spec troscopy [14]. The addition of aluminum oxide is accompanied by a decrease in the fraction of borate tetrahedrons of up to 13 ± 5% for the glass with the highest Al 2 O 3 content (sample 50ABB).…”

Structural investigations on 20MO-xBi2O3-(80-x)B2O3 (M=Ca, Sr and Ba; x=15 and 55) glasses

“…Markova et al reported [49] that in BaO-B 2 O 3 glasses boson peak frequency and intensity increases with rise in T g . But in the present study, peak intensity increases and T g decreases with increase in Bi 2 O 3 mol%.…”

Application of the constant stoichiometry grouping concept to the Raman spectra of Pb(PO3)2-TeO2 glasses

“…2-5, 7, and 9 these intensities were multiplied by Vn 2 because variation of molar volume (in dependence on glass composition) will result in changing of quantity of scattering centers in the laser beam and, on the other hand, refractive index will vary the aperture of collection of scattered radiation. Details of the measurement procedure are described elsewhere [38,39]. Powders of glasses were crystallized in an electrical furnace using appropriate temperature-time conditions.…”