English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 49521/84657 (58%)
造访人次 : 7592817      在线人数 : 81
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/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.html0KbHTML89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

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈