Abstract
The structure of three ZnO–Fe2O3–P2O5 glass series was investigated by Raman and IR spectroscopy. Raman and IR spectral changes with increasing O/P ratio from 2.8 to 3.7 were summarized. Band assignments were carried out according to previous investigations and spectral changes. Spectral changes mainly include relative amplitudes decrease of Raman bands at ~1344, ~1205 and ~705cm−1, relative amplitudes increase of Raman bands at ~947 and ~1080cm−1, intensification of the overlaps of IR absorption bands in the region of 900–1400cm−1, obvious decrease in relative amplitudes of IR bands at ~1351, ~1251, ~780 and ~480cm−1 and the shift of the band at ~480cm−1 to higher wavenumber. These spectral changes have shown a gradual depolymerization of phosphate network and the variation of dominant structural units from Q2 to Q1 species with increasing O/P ratio from 2.8 to 3.7. A small quantity of Q1, Q0 and Q2 species were also detected in our glasses with O/P ratios in the range of 2.8–3.0, 3.0–3.5 and 3.5–3.7, respectively. Our investigations will provide guidance to know the structure of other phosphate glass systems.
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