The Effect of Fe^<3+> Ions on the Anionic Structure of Iron-bearing Sodium Silicate Melts

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概要

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• 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.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.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.

• 社団法人 日本鉄鋼協会の論文
• 2000-12-15

著者

• SASAKI Yasushi

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

• Ishii Kuniyoshi

  Division Of Materials Science And Engineering Graduate School Of Engineering

• MOHRI Michiya

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

• SUYAMA Kentaro

  Formerly at Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido

• Mohri M

  Hokkaido Univ. Sapporo Jpn

• Suyama Kentaro

  Formerly At Division Of Materials Science And Engineering Graduate School Of Engineering Hokkaido Un

• Sasaki Yasushi

  Division Of Materials Science And Engineering Graduate School Of Engineering

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• The Effect of the Liquid Fe-C Phase on the Kinetics in the Carburization of Iron by CO at 1523K
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• A Method for Measuring Particle Size in Overlapped Particle Images
• The Interfacial Reaction of CO with Liquid Iron by ^C^O-^C^O Isotope Exchange Reaction
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• Factors on the Measurement of Effective Thermal Diffusivity of Molten Slag Using Double Hot Thermocouple Technique
• Transformation Characteristics of Ce-TZP during Shape Memory Cycles
• The Effect of Fe^ Ions on the Anionic Structure of Iron-bearing Sodium Silicate Melts
• Rupture Phenomena of Molten Na_2O・2SiO_2 Thin Films
• The Decarburization of Liquid Iron in Low Carbon Content by CO_2-CO Gas Mixtures
• Rate of Peritectic Reaction in Iron-Carbon System Measured by Solid/Liquid Diffusion Couple Method.

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