教師資料查詢 | 類別: 期刊論文 | 教師: 王啟銘WANG, CHI-MING (瀏覽個人網頁)

標題: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
語言英文
ISSN0254-0584
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