Compact Li-doped Gd2Ti2O7 prepared with LiO0.5 self-flux
學年 102
學期 2
出版(發表)日期 2014-02-13
作品名稱 Compact Li-doped Gd2Ti2O7 prepared with LiO0.5 self-flux
著者 L.C. Wen; H.Y. Hsieh; S.C. Chang; M.Y. Lin; Y.H. Lee; W.P. Su; H.-C.I. Kao*; H.S. Sheu; L.Y. Jang; M.C. Lee; Y.S. Lee
著錄名稱、卷期、頁數 Materials Research Bulletin 50(2), pp.297-302
摘要 A series of (Gd2−xLix)Ti2O7−x with x = 0.040–0.110 was first reported. Parent compound with 2x moles of LiO0.5 self-flux was prepared at 1250 °C and abbreviated as GLT-2L. Relative density of all the samples is higher than 92%. By the addition of flux and Li ions substitution, preparation temperature is lowered for more than 300 °C. Comparing the unit cell a-axis, GLT with a formula as (Gd2−xLix)Ti2O7−x without flux addition has exactly the same as the GLT-2L with the same x. By the addition of flux, materials become more compact and grains grow bigger for the GLT-2L than the corresponding GLT samples. Electrical conductivity of a GLT-2L with x = 0.110 at 700 °C is 3 times larger than the measurements done by other research groups in the Gd2Ti2O7. In order to demonstrate the successful substitution of the Li ion into the Gd site, a series of GT samples was prepared with a formula of Gd2−xTi2O7−1.5x. With the same amount of x, every GLT samples have a longer unit cell a-axis than that of the GT. The difference is caused by the substitution of the Li ion into the Gd site. Valence of the Ti atoms of the GLT-2L samples is slightly less than 4 studied by the XANES spectroscopy.
關鍵字 A. Oxides;C. Electron microscopy;C. XANES;C. X-ray diffraction;D. Electrical properties
語言 en
ISSN 0025-5408 1873-4227
期刊性質 國外
收錄於 SCI
產學合作 國內
通訊作者 高惠春
國別 GBR
出版型式 ,電子版,紙本

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