The effect of grain size on the low-temperature electrical conductivity of doped CeO2

被引：31
作者：
Kang, Young Jin
Park, Hee Jung
Choi, Gyeong Man [1 ]
机构：
[1] Pohang Univ Sci & Technol, Fuel Cell Res Ctr, Pohang 790784, South Korea
来源：
SOLID STATE IONICS | 2008年 / 179卷 / 27-32期
关键词：
doped ceria; alumina; electrical conductivity; grain size; migration enthalpy;
D O I：
10.1016/j.ssi.2008.01.069
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Alumina was added to doped ceria and its effect on the grain conductivity was studied. The electrical conductivities of Gd, Sm, or Y-doped ceria (CeO2) with or without alumina addition were measured as a function of temperature (250-700 degrees C) in air. Impedance measurement enabled the separation of the grain conductivity and the grain boundary conductivity. With alumina addition of 1, 2, and 5 mol%, the grain conductivity of alumina-added samples below 400 degrees C increased with the accompanied grain size increase and the migration enthalpy decrease. A model was proposed to explain the observation that includes the low-conductivity region in the grain of doped ceria. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1602 / 1605
页数：4
相关论文
共 50 条
  • [41] Impact of the surface/interface on the ionic conductivity of thin film Gd-doped CeO2
    Swanson, Matthew
    Sunder, Madhana
    Tangtrakarn, Natee
    Krishna, Lakshmi
    Moran, P. D.
    [J]. SOLID STATE IONICS, 2011, 189 (01) : 45 - 49
  • [42] Interfacial stability and ionic conductivity enhanced by dopant segregation in eutectic ceramics: the role of Gd segregation in doped CeO2/CoO and CeO2/NiO interfaces
    Orera, Alodia
    Wang, Funing
    Ferreiro-Vila, Elias
    Serrano-Zabaleta, Sonia
    Larranaga, Aitor
    Laguna-Bercero, Miguel A.
    Dickey, Elizabeth C.
    Rivadulla, Francisco
    Munoz, M. Carmen
    Larrea, Angel
    [J]. JOURNAL OF MATERIALS CHEMISTRY A, 2020, 8 (05) : 2591 - 2601
  • [43] Low-Temperature Spark Plasma Sintering of Yttria Ceramics with Ultrafine Grain Size
    Yoshida, Hidehiro
    Morita, Koji
    Kim, Byung-Nam
    Hiraga, Keijiro
    Yamanaka, Kohei
    Soga, Kohei
    Yamamoto, Takahisa
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2011, 94 (10) : 3301 - 3307
  • [44] Processing of Samarium Doped Ceria for IT-SOFC. Grain Boundary Effect on the Electrical Conductivity
    Sanchez-Bautista, C.
    Dos Santos-Garcia, A. J.
    Pena-Martinez, J.
    Canales-Vazquez, J.
    [J]. BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO, 2010, 49 (01): : 7 - 14
  • [45] Grain size dependence of electrical properties of Gd-doped ceria
    Hara, Akihiro
    Hirata, Yoshihiro
    Sameshima, Soichiro
    Matsunaga, Naoki
    Horita, Teruhisa
    [J]. JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2008, 116 (1350) : 291 - 297
  • [46] Effect of grain size on phase stability of monoclinic U-Nb alloy during low-temperature aging
    Zhang, Yanzhi
    Zhang, Xinjian
    Chen, Xianglin
    Guan Weijun
    Wang, Xiaolin
    [J]. JOURNAL OF NUCLEAR MATERIALS, 2015, 465 : 167 - 169
  • [47] Effect of grain size and grain boundary defects on electrical and magnetic properties of Cr doped ZnO nanoparticles
    Aljawfi, Rezq Naji
    Rahman, F.
    Batoo, Khalid M.
    [J]. JOURNAL OF MOLECULAR STRUCTURE, 2014, 1065 : 199 - 204
  • [48] Fabrication and electrical properties of nanocrystalline Dy3+-doped CeO2 for intermediate-temperature solid oxide fuel cells
    Park, K.
    Hwang, H. K.
    [J]. ENERGY, 2013, 55 : 304 - 309
  • [49] Low-temperature densification and grain growth of Bi2O3-doped-ceria gadolinia ceramics
    Gil, Vanesa
    Moure, Carlos
    Duran, Pedro
    Tartaj, Jesus
    [J]. SOLID STATE IONICS, 2007, 178 (5-6) : 359 - 365
  • [50] Grain size dependence of electrical conductivity in polycrystalline cerium oxide
    Tschöpe, A
    Birringer, R
    [J]. JOURNAL OF ELECTROCERAMICS, 2001, 7 (03) : 169 - 177
12345