Relationship Between Oxide-Ion Conductivity and Ordering of Oxygen Vacancy in the Ln2Zr2O7 (Ln = La, Nd, Eu) System Using High Temperature XRD

被引：18

作者：

Hagiwara, Takeshi ^{[1
]}

Yamamura, Hiroshi ^{[2
]}

Nishino, Hanako ^{[2
]}

机构：

[1] Kanagawa Univ, Inst Engn Res, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan

[2] Kanagawa Univ, Dept Mat & Life Chem, Fac Engn, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan

来源：

JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY | 2011年 / 8卷 / 05期

关键词：

solid oxide fuel cells; zirconia; oxygen; SOLID ELECTROLYTES; PYROCHLORE; FLUORITE; SELECTION;

D O I：

10.1115/1.4003785

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The pyrochlore-type Ln(2)Zr(2)O(7) (Ln = La, Nd, Eu) systems were refined by Rietveld analyses of XRD data combined with the MEM-based pattern fitting at RT, 873, 1073, and 1273 K. All the samples kept a single cubic phase of the pyrochlore-type structure in the temperature range up to 1273 K. The oxide-ion conductivities of the present systems were discussed on a basis of ordering of oxygen vacancy in the pyrochlore-type structure. The-oxide-ion conduction of Eu2Zr2O7 was ascribed to diffusion of oxygen along the < 100 > direction, while the hole conduction of La2Zr2O7 occurred along the < 110 > direction, according to the charge density map estimated by the MEM analysis. [DOI: 10.1115/1.4003785]

引用

页数：5

共 19 条

[1]

Bhattacharya AK, 1996, EUR J SOL STATE INOR, V33, P441

[2] STRUCTURE AND CONDUCTIVITY OF PYROCHLORE AND FLUORITE TYPE SOLID-SOLUTIONS [J].

BURGGRAAF, AJ ;

VANDIJK, T ;

VERKERK, MJ .

SOLID STATE IONICS, 1981, 5 (OCT) :519-522

[3] ON THE SYSTEMATIC SELECTION OF PEROVSKITE SOLID ELECTROLYTES FOR INTERMEDIATE TEMPERATURE FUEL-CELLS [J].

COOK, RL ;

SAMMELLS, AF .

SOLID STATE IONICS, 1991, 45 (3-4) :311-321

[4]

Hagiwara T., 2010, J SOC INORG MAT JPN, V17, P359

[5] Thermal expansion of Sr- and Mg-doped LaGaO3 [J].

Hayashi, H ;

Suzuki, M ;

Inaba, H .

SOLID STATE IONICS, 2000, 128 (1-4) :131-139

[6]

Izumi F., 2002, Recent Research Developments in Physics, Part II, P699

[7] Three-dimensional visualization in powder diffraction [J].

Izumi, Fujio ;

Momma, Koichi .

APPLIED CRYSTALLOGRAPHY XX, 2007, 130 :15-20

[8] Fast oxygen transport in acceptor doped oxides [J].

Kilner, JA .

SOLID STATE IONICS, 2000, 129 (1-4) :13-23

[9] Order-disorder transition in the Nd2-yYyZr2O7 system: Probed by X-ray diffraction and Raman spectroscopy [J].

Mandal, B. P. ;

Krishna, P. S. R. ;

Tyagi, A. K. .

JOURNAL OF SOLID STATE CHEMISTRY, 2010, 183 (01) :41-45

[10] Disorder in pyrochlore oxides [J].

Minervini, L ;

Grimes, RW ;

Sickafus, KE .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2000, 83 (08) :1873-1878

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