Kinetics and stability of R(Ba1.5Sr0.5)Cu3Oy (R=La, Nd, Sm, Eu, Gd, Dy, Ho) superconductors in water
學年 92
學期 1
出版(發表)日期 2003-11-15
作品名稱 Kinetics and stability of R(Ba1.5Sr0.5)Cu3Oy (R=La, Nd, Sm, Eu, Gd, Dy, Ho) superconductors in water
作品名稱(其他語言)
著者 Lin, C. H.; 高惠春; Kao, H. C. I.; 王啟銘; Wang, C. M.
單位 淡江大學化學學系
出版者 Elsevier
著錄名稱、卷期、頁數 Materials Chemistry and Physics 82(2), Pp.435-439
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.
關鍵字 Superconductors;Solid state synthesis;Corrosion;Oxygen stoichiometry
語言 en
ISSN 0254-0584
期刊性質 國外
收錄於
產學合作
通訊作者
審稿制度
國別 CHE
公開徵稿
出版型式 ,紙本
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