Influence of Fe/P Mole Ratio on Structure and Chemical Durability of Iron-Phosphate GlassCeramics With ZrO2

Abstract

In order to study the changes of the structure and chemical durability with Fe/P mole ratio(r(Fe/P)), a series of P2O5-Fe2O3-Al2O3-Na2O-ZrO2 glass-ceramic samples with different Fe/P mole ratios were prepared by the melting-quenching method. X-ray diffraction was used for phase analysis, and Raman spectroscopy, X-ray photoelectron spectroscopy and M-ssbauer spectroscopy were used for structural analysis. n(Fe3+)/(n(Fe2+)+n(Fe3+)) mole ratios increase with the increase of Fe/P mole ratio when the Fe/P mole ratio is less than 0.18. When the Fe/P mole ratio is between 0.18 and 0.32, n(Fe3+)/(n(Fe2+)+n(Fe3+)) fluctuates around 60%. The samples with Fe/P mole ratio between 0.2 and 0.3 have the best chemical durability and relatively low crystal fraction.

Keywords

• zro2
• iron-phosphate glass-ceramics
• structure analysis
• chemical durability