Ceramics-Silikáty 43 (4) 169-174 (1999)

A STUDY OF THE STRUCTURE OF BINARY MAGNESIUM ULTRAPHOSPHATE GLASSES BY VIBRATIONAL SPECTROSCOPY

K. Meyer, A. Barz, D. Stachel

The infrared spectra of a series of binary magnesium ultraphosphate glasses x MgO.(1-x) P₂O₅ with 0.0 < x < 0.5 were measured and evaluated by means of principal component analysis. The structure of the magnesium ultraphosphate glasses is analyzed in comparison to the binary calcium and zinc ultraphosphate glasses, respectively. As in the case of the ZnO-P₂O₅ glasses the structure of these MgO-P₂O₅ glasses is dominated by three structural elements, vitreous P₂O₅, MgP₄O₁₁, and Mg(PO₃)₂, which separate the ultraphosphate region into two regions with a binary distribution of the limiting structural elements. In the region with low MgO content (less than x = 0.3) the infrared spectra show certain similarities with the spectra of the CaO-P₂O₅ glasses.

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