Analysis of Ni Ions in Vitreous Silicate by means of ESCA

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  • ESCAによる珪酸塩中のNiの状態分析
  • ESCA ニヨル ケイサンエンチュウ ノ Ni ノ ジョウタイ ブンセキ

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In order to consider the redox equilibrium of Ni3+\ ightleftarrowsNi2+ in silicate melts, the ESCA spectra of Ni2p3/2 level for the glasses of Na2O-SiO2-NiO and CaO-SiO2-NiO systems have been measured.<BR>The ESCA spectra of Ni2p3/2 level for these glasses shift from Ni3+ to Ni2+ side with increasing NiO content and (Na2O or CaO)/SiO2 molar ratio. The redox equilibrium of Ni3+\ ightleftarrowsNi2+ in silicate melts seemed to be represented by a R type equation in which lower valency ion increases with increasing O2− (basicity). The behavior of Ni ions in silicate melts was discussed by referring to the results about the physical properties and farinfrared spectra reported in the previous papers.

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