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:Qualitative study on the reaction of Bi1.8Pb0.4Ca2Sr2Cu3Oy superconductor with water
學年82
學期1
出版(發表)日期1993/09/01
作品名稱Qualitative study on the reaction of Bi1.8Pb0.4Ca2Sr2Cu3Oy superconductor with water
作品名稱(其他語言)
著者王啟銘; Wang, C. M.; Wei, T. P.; 高惠春; Kao, H. C. I.
單位淡江大學化學學系
出版者Amsterdam: Elsevier BV * North-Holland
著錄名稱、卷期、頁數Physica C: superconductivity 214(1-2), pp.179-181
摘要When Bi1.8Pb0.4Ca2Sr2Cu3Oy powders were immersed into deionized water, a large quantity of Ca2+ and Sr2+ ions was detected in the aqueous solution, indicating the decomposition of the Bi1.8Pb0.4Ca2Sr2Cu3Oy superconductors in water. The pH of the solution was initially increased rapidly to 11.1 due to the formation of OH- ions. However, after 30 min, in the open system, the Ca2+ and Sr2+ ions would further react with CO2 in the atmosphere to form sparingly soluble carbonates and the pH of the solution was slowly decreased to 9.81 over 20 h. Only a small amount of Bi3+, Pb2+ and Cu2+ ions was detected in the aqueous solution. Non-soluble products, such as Bi2CuO4, CuO and Cu6PbO8, were observed in the reaction residue which might act as a barrier to prevent deterioration of the superconductor with water in the bulk sample. The chemical equation was given as Bi1.8PbxCa2Sr2Cu3Oy(s)+4H2O→2Ca2+(aq)+2Sr2+(aq) +8OH-(aq)+0.9Bi2CuO4(s)+xCu6PbO8(s)+(3−0.9−6x)CuO(s).
關鍵字
語言英文
ISSN0921-4534
期刊性質國外
收錄於SCI
產學合作
通訊作者
審稿制度
國別荷蘭
公開徵稿
出版型式紙本
相關連結
Google+ 推薦功能,讓全世界都能看到您的推薦!