Fabrication of Nano-structured DyxCe1-xO2-x/2(x=0.15 and 0.2) Electrolytes Using Combined Process of Spark Plasma Sintering and Conventional Sintering

Author

Kobayashi, Tomoaki ; Mori, Toshiyuki ; Wang, Yarong ; Ou, Ding Rong ; Ye, Fei ; Kobayashi, Hidehiko ; Drennan, John

Author_Institution

Nat. Inst. for Mater. Sci.

fYear

2005

Firstpage

922

Lastpage

927

Abstract

Doped ceria (CeO₂) compounds are fluorite-type oxides that show oxide ionic conductivity higher than yttria-stabilized zirconia in oxidizing atmosphere. As a consequence of this, considerable interest has been shown in application of these materials for "low" (500deg-650degC) temperature operation of solid oxide fuel cells (SOFCs). To improve the conductivity in dysprosium (Dy) doped CeO₂, sinterability nanopowders were synthesized via carbonate coprecipitation method. The dense sintered bodies were fabricated using a combined method of spark plasma sintering (SPS) and conventional sintering (CS)

Keywords

cerium compounds; doping profiles; dysprosium compounds; electrolytes; ionic conductivity; nanotechnology; precipitation; sintering; solid oxide fuel cells; 500 to 650 C; Dy_xCe_1-xO_2-0.5x; carbonate coprecipitation method; conventional sintering; doped ceria compounds; doped dysprosium; fluorite-type oxides; nano-structured electrolyte fabrication; oxide ionic conductivity; solid oxide fuel cells; spark plasma sintering; yttria-stabilized zirconia; Atmosphere; Conducting materials; Conductivity; Fabrication; Fuel cells; Nanoparticles; Plasma applications; Plasma temperature; Solids; Sparks; SOFC; SPS; carbonate coprecipitation; doped CeO; oxide ionic conductivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Environmentally Conscious Design and Inverse Manufacturing, 2005. Eco Design 2005. Fourth International Symposium on

Conference_Location

Tokyo

Print_ISBN

1-4244-0081-3

Type

conf

DOI

10.1109/ECODIM.2005.1619380

Filename

1619380