Excess Electrochemical Vaporization of SiO from Na_2O-SiO_2 Molten Slag by Transfer Thermal Plasma of Ar

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Transfer thermal plasma of argon (Ar) was applied onto the surface of 25 mol% Na<SUB>2</SUB>O-SiO<SUB>2</SUB> molten slag using a hybrid plasma furnace composed of non-transfer and transfer thermal plasma. A tungsten rod was used as an electrode. The flame from the transfer plasma spread over the surface of the slag. The direct current of the transfer plasma was a maximum just after ignition and then decreased. When the transfer plasma was applied with a voltage less than 80 V, the iron dissolved and diffused into the molten slag as Fe<SUP>2+</SUP> at the iron plate anode electrode according to Faraday's law. For voltages over 90 V, oxygen gas bubbles evolved at the anode in addition to iron dissolution. SiO gas vaporized more than sodium (Na) gas from the slag surface, although the opposite phenomena should take place thermodynamically and kinetically. Furthermore, the quantity of SiO gas was 10 to 100 times more than that expected from Faraday's law.

収録刊行物

  • Materials transactions  

    Materials transactions 49(6), 1327-1332, 2008-06-01 

    The Japan Institute of Metals and Materials

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各種コード

  • NII論文ID(NAID)
    10021147531
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    9519219
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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