Kinetics and stability of R(Ba1.5Sr0.5)Cu3Oy (R=La, Nd, Sm, Eu, Gd, Dy, Ho) superconductors in water

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题名:	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.
贡献者:	淡江大學化學學系
关键词:	Superconductors;Solid state synthesis;Corrosion;Oxygen stoichiometry
日期:	2003-11-15
上传时间:	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
显示于类别:	[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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