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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/25028

    Title: Kinetics and stability of R(Ba1.5Sr0.5)Cu3Oy (R=La, Nd, Sm, Eu, Gd, Dy, Ho) superconductors in water
    Authors: Lin, C. H.;高惠春;Kao, H. C. I.;王啟銘;Wang, C. M.
    Contributors: 淡江大學化學學系
    Keywords: Superconductors;Solid state synthesis;Corrosion;Oxygen stoichiometry
    Date: 2003-11-15
    Issue Date: 2009-12-01
    Publisher: Elsevier
    Abstract: The reaction of R(Ba1.5Sr0.5)Cu3Oy (RS123, R=La, Nd, Sm, Eu, Gd, Dy, Ho) powder with water is studied quantitatively. The initial reaction rate law is R0=k[S]0a[H3O+]0b, where [S]0 is the initial surface area of the RS123 superconducting powder. For the entire RS123 series, a is close to 1, indicating that the reaction rate is linearly dependent on the surface area of the powder. However, b is variable for the whole series. For R=La, Nd, Sm, Eu, Gd, Dy, and Ho, b equals to 0.75, 0.70, 0.62, 0.56, 0.51, 0.56, and 0.60, respectively. It is found that the stability of RS123 in water is correlated with the oxygen stoichiometry of RS123. The stability decreases with increasing the oxygen stoichiometry.
    Relation: Materials Chemistry and Physics 82(2), Pp.435-439
    DOI: 10.1016/S0254-0584(03)00321-3
    Appears in Collections:[化學學系暨研究所] 期刊論文
    [化學工程與材料工程學系暨研究所] 期刊論文

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