Year: 2020
Type: article
Abstract: A new series of quaternary glasses with chemical composition xBi 2 O 3 -(80-x)TeO 2 -10B 2 O 3 -10GeO 2 where 40 ≤ x ≤ 65 have been prepared by melt quenching technique. X- ray diffraction measurements have been achieved to check the amorphous nature of the glasses. The effect of Bi 2 O 3 content on the physical, thermal and optical properties of the prepared glasses was studied. It is observed that oxygen packing density decreased with the increase of molar volume with increasing Bi 2 O 3 content implying the formation of non-bridging oxygen's and expands the glass. The glass transition temperature (T g ) increased whereas the glass stability decreased with Bi 2 O 3 . In addition to that, indirect optical band gap and Urbach energy values of the titled glasses have been calculated from Tauc plots using absorption spectra. The indirect optical band gap (E opt ) decreased with the increase of Bi 2 O 3 concentration in the present glass system. The Raman spectroscopy at room temperature was employed to study the influence of bismuth oxide on the boron-oxygen network structure. The analysis of Raman spectra shows the presence of fundamental vibrations of TeO 3 , GeO 6 , BO 3 , BO 4 , BiO 6 structural units.
Source: Materials Research Express
Institutions: Osmania University, University College for Women
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,000
Funder: University of Hyderabad
OpenAlex ID: W3000715477