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YBa3Fe3O10混合导体的缺陷及电性能研究
  • ISSN号：1005-023X
  • 期刊名称：《材料导报》
  • 时间：0
  • 分类：TQ174.758[化学工程—陶瓷工业;化学工程—硅酸盐工业] O484[理学—固体物理;理学—物理]
  • 作者机构：[1]南昌航空大学材料科学与工程学院,南昌330063
  • 相关基金：国家自然科学基金资助项目（50672100）;江西省教育厅资助项目（赣技字[2006]55;[2006]313）
作者： 张国光[1], 张静[1], 李琴[1], 崔明杰[1]
关键词： SEEBECK系数, 氧非化学计量, 电导率, 氧化学扩散系数, Seebeck coefficient, oxygen nonstoichiometry, conductivity, oxygen chemical diffusion coefficient
中文摘要：

采用柠檬酸盐法制备了纯相YBa3Fe3O10材料。采用碘滴定方法得到了YBa3Fe3O10在不同温度下的氧非化学计量值δ，δ值随温度的升高而增加。Seebeck系数测量和电导率测量结果表明，YBa3Fe3O10的栽流子类型为P型，根据缺陷反应方程（Oo^x2FeFeO^4＋=2FeFe4＋=2FeFe^x3＋＋Vo＋1/2O2↑，解释了电导率随温度和氧分压变化的规律。800℃时YBa3Fe3O10的氧化学扩散系数达3．0×10^-5cm2／s量级。

英文摘要：

Mixed oxide ion conductor YBa3Fe3O10 is synthesised by citric acid method. Iodine titration results show that the oxygen nonstoichiometry 8 of YBa3Fe3O10 increases with the increase of temperature. Seebeck coefficient and conductivity measurement results indicate YBa3Fe3O10 is a p-type conductor. The varation of conductivity of YBaa Fe3Ol0 with temperature and oxygen partial pressure is explained in terms of defect reaction Oo^x2FeFeO^4＋=2FeFe4＋=2FeFe^x3＋＋Vo＋1/2O2↑. At 800℃, oxygen chemical diffusion coefficient of YBaaFeaO10 is 3. 0× 10^-5cm2/s.

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期刊信息
  • 《材料导报：纳米与新材料专辑》
  • 主管单位:重庆西南信息有限公司(原科技部西南信息中心)
  • 主办单位:重庆西南信息有限公司(原科技部西南信息中心)
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  • 地址：重庆市渝北区洪湖西路18号
  • 邮编：401121
  • 邮箱：matreved@163.com
  • 电话：023-67398525
  • 国际标准刊号：ISSN：1005-023X
  • 国内统一刊号：ISSN：50-1078/TB
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  • 被引量:3397