Electrical properties of the (Y2-xLix)Ti2O7-x samples with LiO0.5 self-flux

doi:10.1016/j.ssi.2013.09.034

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/104527

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/104527

题名:	Electrical properties of the (Y2-xLix)Ti2O7-x samples with LiO0.5 self-flux
作者:	Wen, L.C.;Tsai, Y.I.;Lin, H.K.;Chang, S.C.;Lin, M.Y.;Chang, H.S.;Kao, H.-C.I.;Jang, L.Y.;Lee, M.C.;Lee, Y.S.
关键词:	Pyrochlore;Titanate;Flux;Electrical property;Oxide ion conductor
日期:	2013-12-15
上传时间:	2016-01-06 11:01:13 (UTC+8)
摘要:	A series of (Y2 − xLix)Ti2O7 − x samples abbreviated as YLT-2L were prepared by the addition of 2x moles of LiO0.5 self-flux into the parent compound, where x = 0.040 to 0.110. Preparation temperatures were either 1300 or 1350 °C, depending on the amount of flux addition. However, the Y2Ti2O7 had no LiO0.5 co-existence; it was prepared at the highest temperature, 1600 °C. Relative densities of all the YLT-2L samples were larger than 97%, but for the Y2Ti2O7, it was 94.3(2)% only. By the addition of flux, preparation temperature reduced for more than 250 °C. Among all the YLT-2L samples, the one with x = 0.070 had the highest total electrical conductivity (2.90(2) × 10− 4 S·cm− 1 at 700 °C) and the lowest total activation energy (0.99(1) eV). By doping Li ion into the Y-site, oxygen vacancies were created, although YLT-2L samples had flux co-existence, electrical conductivity was still comparable to the parent compound reported by Yamaguchi et al. (1998) and Kobayashi et al. (2002). At 500, 600 and 700 °C, the ionic transference numbers (ti) found for the YLT-2L samples were 1.00(2), 0.96(2) and 0.90(3), respectively, and did not vary with the amount of substitution and the flux addition. Contribution of the electronic conductivity was due to the presence of a small amount of the Ti3 + ions in the samples investigated by the Ti K-edge XANES spectra.
關聯:	Solid State Ionics, 253 (1), pp.227-233
DOI:	10.1016/j.ssi.2013.09.034
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	211	检视/开启

在機構典藏中所有的数据项都受到原著作权保护.

TAIR相关文章

数据加载中.....