Chemical Expansion and Frozen-in Oxygen Vacancies in Pr-doped Ceria

被引：5

作者：

Kuru, Y. ^{[1
,2
]}

Bishop, S. R. ^{[1
]}

Kim, J. J. ^{[1
]}

Yildiz, B. ^{[2
]}

Tuller, H. L. ^{[1
]}

机构：

[1] MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[2] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA

来源：

SOLID OXIDE FUEL CELLS 12 (SOFC XII) | 2011年 / 35卷 / 01期

关键词：

CE0.8GD0.2O1.9;

D O I：

10.1149/1.3570094

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Doped CeO2 is a promising candidate for solid oxide fuel cell electrolyte and electrode applications because of its high ionic conductivity and reduction/oxidation behavior at intermediate temperatures. Its electronic and ionic properties and microstructural stability are of particular interest. The present study demonstrates that the large number of oxygen vacancies created in PrxCe1-xO2-delta (PCO) at elevated temperatures can be accommodated at room temperature if cooling is performed in relatively low oxygen partial pressures (i.e. P(O-2) similar to 10(-3) mbar). We use the temperature dependence of the chemical expansion in reduced PCO as a metric to explore this phenomenon.

引用

页码：1131 / 1136

页数：6

共 15 条

[1] [Anonymous], 2007, ELECTROCHEM SOLID ST
[2] Chemically-induced stresses in gadolinium-doped ceria solid oxide fuel cell electrolytes
Atkinson, A
[J]. SOLID STATE IONICS, 1997, 95 (3-4) : 249 - 258
[3] Bishop S. R., ECS T IN PRESS
[4] Bishop S. R., IN PRESS
[5] Bruce P.G., 1995, Solid state electrochemistry, V1st
[6] Chiang Y.M., 1997, Physical ceramics - Principles for ceramic science and engineering MIT Series in Material Science and Engineering
[7] Cullity B. D., ELEMENTS XRAY DIFFRA
[8] Synthesis and characteristics of complex multicomponent oxides prepared by polymer complex method
Kakihana, M
Yoshimura, M
[J]. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1999, 72 (07) : 1427 - 1443
[9] On the origin of the lattice constant anomaly in nanocrystalline ceria
Kossoy, A
Feldman, Y
Wachtel, E
Gartsman, K
Lubomirsky, I
Fleig, J
Maier, J
[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2006, 8 (09) : 1111 - 1115
[10] Elasticity of solids with a large concentration of point defects II.: The chemical strain effect in Ce0.8Gd0.2O1.9
Kossoy, Anna
Feldman, Yishay
Wachtel, Ellen
Lubomirsky, Igor
Maier, Joachim
[J]. ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (14) : 2393 - 2398

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