| 標題：Electrical properties of the (Gd2−xLix)Ti2O7−x co-existence with the LiO0.5 self-flux |
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| 學年 | 103 |
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| 學期 | 2 |
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| 出版（發表）日期 | 2015/05/01 |
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| 作品名稱 | Electrical properties of the (Gd2−xLix)Ti2O7−x co-existence with the LiO0.5 self-flux |
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| 作品名稱（其他語言） | |
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| 著者 | Wen, Liang-Chang; Tsai, Yun-I; Hsu, Tzu-Huan; Wang, Ching-Hsien; Wu, Mong-Shin; Kao, Huey-Chuen I.; Lee, Maw-Chwain |
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| 單位 | |
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| 出版者 | |
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| 著錄名稱、卷期、頁數 | Journal of the ceramic society of Japan 123(5), pp.367-373 |
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| 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. |
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| 關鍵字 | Pyrochlore;Titanate;Flux;Electrical property;Oxide-ion conductor |
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| 語言 | 英文(美國) |
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| ISSN | |
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| 期刊性質 | 國外 |
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| 收錄於 | SCI; |
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| 產學合作 | 國內; |
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| 通訊作者 | Liang-Chang Wen |
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| 審稿制度 | 否 |
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| 國別 | 日本 |
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| 公開徵稿 | |
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| 出版型式 | ,電子版 |
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| 相關連結 | |
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