水溶液中のMo錯体構造とMo合金めっき機構 The Structure of Poly-Molybate Ions and It's Relevance to the Electroplating of Molybdenum Alloy

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In order to understand codeposition in Mo-Ni alloy electroplating, we studied the environmental atomic scale structure around metallic cations in aqueous solutions for electroplating using anomalous X-ray scattering (AXS) and EXAFS. The size of complex ions in aqueous solutions was also estimated by applying small-angle X-ray scattering (SAXS), and the distribution of chemical species in solutions was obtained from multivariate analysis of visible absorption spectra. The results of AXS, EXAFS and SAXS indicate that a solution containing molybdate involves a isopoly-molybdate anion consisting of seven edge-shared MoO<sub>6</sub> octahedra and a solution added nickel sulfate quite likely involves a heteropoly-molybdate anion formed by six edge-shared MoO<sub>6</sub> octahedra surrounding a nickel. On the other hand, linkages of octahedra in the heteropoly anion are broken when citrate is added to the Mo-Ni solution. From the multivariate analysis of visible absorption spectra, we found that addod citric ions form new complexes with Mo as well as Ni in aqueous solutions. Thus, disconnection of relatively large complex appears to be essential for the codeposition process as Mo-Ni alloy, and citric ions also play an important role in this electroplating.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan

    表面技術 = The Journal of the Surface Finishing Society of Japan 49(10), 1115-1121, 1998-10-01

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002110875
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    4579098
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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