Structure and Crystallization Study of Iron Phosphate Glasses
Phosphate glasses have been studied extensively for their potential applications as disposal of nuclear waste. Addition of iron oxide to phosphate glasses has a significant effect on the structure and properties of these glasses. Differential thermal analysis, x-ray diffraction analysis and Raman spectroscopy have been used in the investigation of structural changes in the phosphate network and crystalline products of xFe2O3(100-x)P2O5 (15 < x < 50) glasses. The addition of Fe2O3 in the phosphate glass results in the systematic changes from chain-like phosphate structure present in metaphosphate to the orthophosphate structure. With increasing iron content, there is a corresponding increase in the concentration of iron(III) ions in the glass and a decrease of the number of P-O-P bonds since these bonds are replaced by an increasing number of Fe-O-P bonds. The results of the crystallization process suggest that the glassy and its crystalline compositions both have the same basic phosphate structure.
A. Mogus-Milankovic et al., "Structure and Crystallization Study of Iron Phosphate Glasses," Key Engineering Materials, vol. 132-136, no. 136 PART 3, pp. 2212-2215, Trans Tech Publications, Jun 1997.
The definitive version is available at http://dx.doi.org/10.4028/www.scientific.net/KEM.132-136.2212
5th conference and exhibition of the European Ceramics Society (1997: Jun. 22-26, Versailles)
Materials Science and Engineering
Keywords and Phrases
Crystallization; Phosphate glasses; Raman spectroscopy; Structure; XRD; Chemical bonds; Crystallization; Differential thermal analysis; Ions; Iron compounds; Phase transitions
International Standard Serial Number (ISSN)
Article - Conference proceedings
© 1997 Trans Tech Publications, All rights reserved.