An infrared study of crystallization in sodium-disilicate glasses containing iron oxides

J. W. Park*, Haydn Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The infrared absorption spectra of sodium-disilicate glasses containing various amounts of Fe2O3 ([Na2O · 2 SiO2]1-x [Fe2O3]x, where x = 0.05, 0.1 and 0.2) were investigated in the wavenumber range from 200-2000 cm-1. The addition of Fe2O3 to the sodium-disilicate glass does not seem to introduce any new absorption band as compared with the spectrum of a pure sodium-disilicate glass; nevertheless, a general shift of the existing absorption bands toward lower wavenumbers is observed. The amount of shift is, in fact, proportional to the content of Fe2O3 in the glass. This observation is consistent with the recently proposed structural model for the bonding of Fe3+ ions in the iron-sodium-silicate glass system. Annealing of 20 mol% iron oxide glasses at 550 and 580°C produced an extra sharp infrared absorption peak at about 610 cm-1 wavenumber. This new peak is believed to be related to the crystallized particles of the glass as concluded from both a scanning electron micrograph and an electron diffraction pattern.

Original languageEnglish
Pages (from-to)515-525
Number of pages11
JournalJournal of Non-Crystalline Solids
Volume40
Issue number1-3
DOIs
StatePublished - 1 Jan 1980

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