Self-Diffusion of ^<22>Na and ^<137>Cs in Simulated Nuclear Waste Glass

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The knowledge of self-diffusion of various elements is important for understanding and elucidating the long-term dissolution of the nuclear waste glass. The self-diffusion coefficients of Na and Cs in P0798 simulated nuclear waste glass have been measured by an ion beam sputter-sectioning technique using the radioactive isotopes <SUP>22</SUP>Na and <SUP>137</SUP>Cs. The temperature dependence of the diffusion coefficients in each temperature range in P0798 glass below the glass transition temperature <I>T</I><SUB>g</SUB> can be expressed by the following equations: (428–574 K):D_Na-belowT_g&=2.7×10^-6exp(-113 ± 4 kJ·mol^-1/RT)m^2·s^-1<BR>(713–758 K):D_Cs-belowT_g&=7.1×10^-5exp(-241 ± 10 kJ·mol^-1/RT)m^2·s^-1The diffusion coefficient of <SUP>22</SUP>Na was about ten orders of magnitude larger than that of <SUP>137</SUP>Cs at 573 K. The large difference in the diffusion coefficients is explained in terms of the ion size effect, the mixed-alkali effect and lower concentration of Cs compared with Na in P0798 glass.

収録刊行物

  • Materials transactions

    Materials transactions 43(4), 654-659, 2002-04-01

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10012322257
  • 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
    6262951
  • 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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