低融点リン酸塩ガラスの構造と性質に対するSiO_2の影響

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The effects of SiO_2 substitution for P_2O_5 on the structure and properties of phosphate glass with the base composition 60P_2O_5・10PbO・20ZnO ・ 10Li_2O were investigated. Glass was formed when there was less than 25.0%. SiO_2 substitution for PO_<5/2>. From measurements of Fourier,・transform infrared spectroscopy and X-ray fluorescence of Si^<4+>Ka, it was found that 6-fold Si^<4+> ions exist in the glass and their number decreases with increasing SiO_2 concentration. The stability of glass ill water was dependent on not only the number of 6 fold Si^<4+> ions but also the compactness of glass, whereas the physical properties were dependent only on the number of 6 fold Si^<4+> ions in glass.
1994-03-01