Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10155537 | Journal of Non-Crystalline Solids | 2018 | 9 Pages |
Abstract
Glasses with nominal molar composition 20B2O3â¯-â¯(80âx)Bi2O3â¯-â¯xFe2O3 (where xâ¯=â¯0-40) were successfully prepared by melt-quenching. These glasses were characterised by multiple techniques including density, X-ray diffraction (XRD), X-Ray fluorescence (XRF), Raman, FT-IR and Mössbauer spectroscopies, dilatometry and differential thermal analysis (DTA). Partial replacement of Bi2O3 by Fe2O3 leads to decreasing density and molar volume and a substantial increase in thermal stability, as measured by several parameters, with maximum improvements achieved when xâ¯=â¯10-20. These improvements are accompanied by modest increases in dilatometric softening point. FT-IR and Raman spectra confirm the presence of BO3 and BiO6 structural units in all glasses, with glass structure apparently little affected by Fe2O3. Mössbauer spectroscopy confirms that iron is present partly as 4-fold coordinated Fe3+ in all glasses, with some 5- and/or 6- coordinated Fe3+ sites also present.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
N. Mary, M. Rebours, E. Castel, S. Vaishnav, W. Deng, A.M.T. Bell, F. Clegg, B.L. Allsopp, A. Scrimshire, P.A. Bingham,