Structural Study of Iron Phosphate Glasses
The effect of iron content on the structure of xFe2O3(100-x)P2O5, (15≤x≤50), glasses was investigated by Raman spectroscopy and x-ray diffraction. The Raman spectra for these glasses indicate that the nature of the phosphate network changes from the chain like metaphosphate to the orthophosphate structure with increasing Fe2O3 content. As the Fe2O3 content increased from 15 to 38 wt% the average length of the polyphosphate chains became shorter as the iron ions were effective in bonding the ends of the chains to the surrounding glass structure. At higher Fe2O3 content, up to 50 wt%, the iron ions occupy tetrahedral sites as a result of iron substitution into phosphate chains and formation of FeO4 tetrahedra. The structure of the glass differs from that of the crystal but the local environment of the iron ions is retained in the glass and crystallised counterpart of these iron phosphate compositions.
A. Mogus-Milankovic et al., "Structural Study of Iron Phosphate Glasses," Physics and Chemistry of Glasses, vol. 38, no. 2, pp. 74-78, Society of Glass Technology, Apr 1997.
Materials Science and Engineering
International Standard Serial Number (ISSN)
Article - Journal
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