TITLE:
IR and Raman Spectra Properties of Bi2O3-ZnO-B2O3-BaO Quaternary Glass System
AUTHORS:
Feng He, Zijun He, Junlin Xie, Yuhui Li
KEYWORDS:
IR and Raman Spectra, Bi2O3-ZnO-B2O3-BaO Quaternary Glass System, Structure
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.5 No.16,
November
25,
2014
ABSTRACT: Among
new low-melting-point glasses, bismuth ate glass is deemed to have the most
potential as an environmentally friendly replacement for polluting
Pb-containing glasses. Current studies of boro-bismuthate glasses focus on the
structural influence of the additional oxide in the context of low-melting-point
electronic sealing applications. In this study, the structure of quaternary Bi2O3-
ZnO-B2O3-BaO glasses was investigated spectroscopic ally,
with Fourier-transform-infrared (FT-IR) and Raman spectra recorded for glasses
with different main oxide contents. Signals in the FT-IR are mainly observed
around 500 cm﹣1,
720 cm﹣1, 840 cm﹣1, 980 - 1080 cm﹣1, and 1200 - 1500 cm﹣1, while the Raman
scattering peaks are located at 130 cm﹣1,
390 cm﹣1, 575 cm﹣1, 920 cm﹣1, and 1250 cm﹣1. The glasses are mainly
structured around [BO3] units and the numbers of [BiO6]
and [BiO3] units increase with the Bi2O3 content increasing. Concurrently, the FT-IR absorption peaks associated with
[BO4] units shift to lower wave numbers, indicating a loosening of
the glass structure. However, as the B2O3 content is increased,
the numbers of [BO3] and [BO4] units increase, while
those of [BiO3] and [BiO6] units decrease, highlighting a
densification of the glass structure. ZnO acts as a network modifier in these
glasses.