教師資料查詢 | 類別: 期刊論文 | 教師: 高惠春 KAO, HUEY-CHUEN (瀏覽個人網頁)

標題:Electrical properties of the (Gd2−xLix)Ti2O7−x co-existence with the LiO0.5 self-flux
學年103
學期2
出版(發表)日期2015/05/01
作品名稱Electrical properties of the (Gd2−xLix)Ti2O7−x co-existence with the LiO0.5 self-flux
作品名稱(其他語言)
著者Wen, Liang-Chang; Tsai, Yun-I; Hsu, Tzu-Huan; Wang, Ching-Hsien; Wu, Mong-Shin; Kao, Huey-Chuen I.; Lee, Maw-Chwain
單位
出版者
著錄名稱、卷期、頁數Journal of the ceramic society of Japan 123(5), pp.367-373
摘要A series of (Gd2-xLix)Ti2O71x with x = 0.050-0.150, abbreviated as GLT-2L were prepared by the addition of 2x mole of LiO0.5 self-flux in the parent compound. Preparation temperatures were between 1450 and 1500°C depending on the amount of the self-flux addition. Relative densities of all GLT-2L samples were larger than 97.9(3)%. However, the parent compound, Gd2Ti2O7 has no LiO0.5 co-existence, it has a relative density of 92.8(4)% only, although it was prepared at a higher temperature, 1650°C. Among the GLT-2L samples, the one with x = 0.110 has the highest total electrical conductivity, 6.17(6) x 10-5 S•cm-1 at 700°C and the lowest activation energy, 0.95(3) eV. Doping Li+ ions into the Gd-site of Gd2Ti2O7, preparation temperature was lowered and samples become denser. Meanwhile, vacancies were created and electrical conductivity was increased. At 500°C, average ionic transference numbers (ti) found for all samples are fully ionic. Increasing temperature, ti decreases slightly due to the increase of the fractional electronic conductivity of the (Gd2-xLix)Ti2O7-x, which is a mixed conductor at high temperature. Ti atoms are in the mixed valence states.
關鍵字Pyrochlore;Titanate;Flux;Electrical property;Oxide-ion conductor
語言英文(美國)
ISSN
期刊性質國外
收錄於SCI;
產學合作國內;
通訊作者Liang-Chang Wen
審稿制度
國別日本
公開徵稿
出版型式,電子版
相關連結
Google+ 推薦功能,讓全世界都能看到您的推薦!