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| 題名: | Kinetics and stability of R(Ba1.5Sr0.5)Cu3Oy (R=La, Nd, Sm, Eu, Gd, Dy, Ho) superconductors in water |
| 作者: | Lin, C. H.;高惠春;Kao, H. C. I.;王啟銘;Wang, C. M. |
| 貢獻者: | 淡江大學化學學系 |
| 關鍵詞: | Superconductors;Solid state synthesis;Corrosion;Oxygen stoichiometry |
| 日期: | 2003-11-15 |
| 上傳時間: | 2009-12-01 |
| 出版者: | Elsevier |
| 摘要: | 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. |
| 關聯: | Materials Chemistry and Physics 82(2), Pp.435-439 |
| DOI: | 10.1016/S0254-0584(03)00321-3 |
| 顯示於類別: | [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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