Structure and Properties of Mo-Fe-Phosphate Glasses

Abstract

The incorporation of MoO3 affects the structure and properties of iron phosphate glasses. Three series of Mo-Fe-phosphate glasses were prepared with MoO3 replacing Fe2O3 while retaining nominal O/P ratios of 3·1, 3·25 and 3·4. Raman spectroscopy and high pressure liquid chromatography provide information about the molybdate and phosphate anions that constitute glass structures. Decreases in molar volume and increases in glass transition temperature with increasing Mo/(Mo+Fe) ratio are attributed to an increased structural crosslink density through the formation of Mo-O-P bonds between MoO6 octahedra and phosphate anions. The Mo-O-P bonds appear to be more readily hydrolysed in water than Fe-O-P bonds, since the glass dissolution rate increases with increasing Mo/(Mo+Fe) ratio.

Department(s)

Materials Science and Engineering

Second Department

Nuclear Engineering and Radiation Science

Keywords and Phrases

Glass Transition; Hematite; High Pressure Liquid Chromatography; Molar Ratio; Molybdenum Oxide; Negative Ions, Cross-Link Densities; Glass Dissolution; Glass Structure; Iron Phosphate Glass; Phosphate Anions; Phosphate Glass; Structure and Properties, Glass

International Standard Serial Number (ISSN)

1753-3562

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Society of Glass Technology, All rights reserved.

Publication Date

01 Apr 2019

Link to Full Text

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