Structure and Crystallization Study of Iron Phosphate Glasses

Abstract

Phosphate glasses have been studied extensively for their potential applications as disposal of nuclear waste. Addition of iron oxide to phosphate glasses has a significant effect on the structure and properties of these glasses. Differential thermal analysis, x-ray diffraction analysis and Raman spectroscopy have been used in the investigation of structural changes in the phosphate network and crystalline products of xFe2O3(100-x)P2O5 (15 < x < 50) glasses. The addition of Fe2O3 in the phosphate glass results in the systematic changes from chain-like phosphate structure present in metaphosphate to the orthophosphate structure. With increasing iron content, there is a corresponding increase in the concentration of iron(III) ions in the glass and a decrease of the number of P-O-P bonds since these bonds are replaced by an increasing number of Fe-O-P bonds. The results of the crystallization process suggest that the glassy and its crystalline compositions both have the same basic phosphate structure.

Meeting Name

5th conference and exhibition of the European Ceramics Society (1997: Jun. 22-26, Versailles)

Department(s)

Materials Science and Engineering

Keywords and Phrases

Crystallization; Phosphate glasses; Raman spectroscopy; Structure; XRD; Chemical bonds; Crystallization; Differential thermal analysis; Ions; Iron compounds; Phase transitions

International Standard Serial Number (ISSN)

1013-9826; 1662-9795

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1997 Trans Tech Publications, All rights reserved.

Publication Date

01 Jun 1997

Link to Full Text

Share

 
COinS