The Effect of Fe3+ Ions on the Anionic Structure of Iron-bearing Sodium Silicate Melts.

• Sasaki Yasushi

  Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University

• Mohri Michiya

  Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University

• Suyama Kentaro

  Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University

• Ishii Kuniyoshi

  Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University

Abstract

The effects of the coordination of iron ions on the anionic structure of molten iron bearing sodium silicate slags at 1 273 K have been investigated by Raman spectroscopy. The Raman spectra of Na₂O–SiO₂–FeO–Fe₂O₃ system equilibrated with various oxygen pressures (pO₂) have been measured. The effect of the concentration of iron oxide on the Raman spectra of these systems has also been studied.<br>Under low pO₂conditions (CO₂/CO < 10), the Raman spectra of Na₂O·2SiO₂–FeO–Fe₂O₃ are essentially the same as that of Na₂O· 2SiO₂. However, under high pO₂ conditions (CO₂/CO > 54), a new Raman band of around 900 cm^-1 1appears and its intensity increases with increase of pO₂ and iron oxide content. The scattering intensity at low frequency region ( < 550 cm^-1) also becomes intense with increase of the iron oxide content.<br>It is confirmed that the near 900 cm^-1 band can be attributable to the network structure involving Fe³⁺ ions. Fe³⁺ ions in the metasilicate melts is found to conjugate the chain units and produce the sheet and monomer units. In the disilicate melts, it will conjugate the sheet units and produce the chain and three-dimensional network units.

Journal

• ISIJ International

  ISIJ International 40 (12), 1181-1187, 2000

  The Iron and Steel Institute of Japan

Keywords

• Raman spectroscopy
• molten sodium silicate
• network
• structure
• tetrahedral coordination
• three-dimensional network

Details

• CRID: 1390282681430747008
• NII Article ID: 10004837785
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.40.1181
• COI: 1:CAS:528:DC%2BD3MXoslWisg%3D%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/40/12/40_12_1181/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed