Journal of Fundamental and Applied Sciences (Jul 2015)

STUDY OF POLYMORPHISM OF BOROVANADATE GLASS OF SODIUM BY RAMAN SPECTROSCOPY LOW FREQUENCIES

  • M. K. Rabia,
  • M. Mayoufi,
  • L. Grosvalet,
  • B. Champagnon

DOI
https://doi.org/10.4314/jfas.v4i1.15
Journal volume & issue
Vol. 4, no. 1
pp. 101 – 107

Abstract

Read online

Sodium tetraborate (100 – x)(Na2B4O7.10H2O)­­ ­­­­­– xV2O5, (x = 0 to 20 mole %) has been elaborated by splat cooling technique. Raman Measurements on the doped and non polish samples reveal the presence of the of α-NaVO3 crystal on the superficial layer. After polishing, Raman spectra characteristic of glasses are obtained with two main bands located at 555 and 1097 cm-1 in the undoped glass and four bands at 241, 381, 776 and 938 cm-1 for the vanadium oxyde doped glasses. The volume devitrification of these glasses occurs at 750° C and the β-NaVO3 crystalline phase is identified by Raman scattering.

Keywords