Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SCANDIA-STABILIZED ZIRCONIA POWDER FOR SOLID OXIDE FUEL CELLS, METHOD FOR PRODUCING SAME, SCANDIA-STABILIZED ZIRCONIA SINTERED BODY FOR SOLID OXIDE FUEL CELLS, METHOD FOR PRODUCING SAID SCANDIA-STABILIZED ZIRCONIA SINTERED BODY FOR SOLID OXIDE FUEL CELLS, AND SOLID OXIDE FUEL CELL
The present invention provides a scandia-stabilized zirconia powder for solid oxide fuel cells or a scandia-stabilized zirconia sintered body for solid oxide fuel cells, each having high crystal structure stability, low grain-boundary resistivity, and high ionic conductivity; and the production methods of these. The scandia-stabilized zirconia powder for solid oxide fuel cells comprises a compound represented by formula (1): (ZrO2)1-x-a(Sc2O3)x(Al2O3)a. In formula (1), 0.09≤x≤0.11 and 0.002≤a<0.01 are satisfied. The scandia-stabilized zirconia powder has a rhombohedral phase crystal structure. The sintered body of the scandia-stabilized zirconia powder has a cubic phase crystal structure. The sintered body of the scandia-stabilized zirconia powder has a grain-boundary resistivity of 12 Ω·cm or less at 550° C.
SCANDIA-STABILIZED ZIRCONIA POWDER FOR SOLID OXIDE FUEL CELLS, METHOD FOR PRODUCING SAME, SCANDIA-STABILIZED ZIRCONIA SINTERED BODY FOR SOLID OXIDE FUEL CELLS, METHOD FOR PRODUCING SAID SCANDIA-STABILIZED ZIRCONIA SINTERED BODY FOR SOLID OXIDE FUEL CELLS, AND SOLID OXIDE FUEL CELL
The present invention provides a scandia-stabilized zirconia powder for solid oxide fuel cells or a scandia-stabilized zirconia sintered body for solid oxide fuel cells, each having high crystal structure stability, low grain-boundary resistivity, and high ionic conductivity; and the production methods of these. The scandia-stabilized zirconia powder for solid oxide fuel cells comprises a compound represented by formula (1): (ZrO2)1-x-a(Sc2O3)x(Al2O3)a. In formula (1), 0.09≤x≤0.11 and 0.002≤a<0.01 are satisfied. The scandia-stabilized zirconia powder has a rhombohedral phase crystal structure. The sintered body of the scandia-stabilized zirconia powder has a cubic phase crystal structure. The sintered body of the scandia-stabilized zirconia powder has a grain-boundary resistivity of 12 Ω·cm or less at 550° C.
SCANDIA-STABILIZED ZIRCONIA POWDER FOR SOLID OXIDE FUEL CELLS, METHOD FOR PRODUCING SAME, SCANDIA-STABILIZED ZIRCONIA SINTERED BODY FOR SOLID OXIDE FUEL CELLS, METHOD FOR PRODUCING SAID SCANDIA-STABILIZED ZIRCONIA SINTERED BODY FOR SOLID OXIDE FUEL CELLS, AND SOLID OXIDE FUEL CELL
TAMAZAKI FUMINORI (Autor:in)
14.05.2020
Patent
Elektronische Ressource
Englisch
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