Preparation and Electrical Properties of Interconnect Material Made by Substituting Mixed Rare Earth Oxides (Sm2O3, Gd2O3, Eu2O3 and CeO2) for La2O3 in La

Hong Hai Zhong; Ji Gui Cheng; Xing Qin Liu; Guang Yao Meng

doi:10.4028/www.scientific.net/KEM.336-338.448

Paper Titles

Fabrication of YSZ/Ni Composites by Gelcasting
p.434

Microstructure and Electrical Conductivity of Ni-YSZ Cermets Prepared by Combustion Synthesis Method
p.437

NiO-SDC Powder for Solid Oxide Fuel Cell Anode Applications by Buffer Solution Method
p.440

Preparation and Characterization of Sm_1-xSr_xCoO₃ Ceramics by the Gelcasting Process
p.444

Preparation and Electrical Properties of Interconnect Material Made by Substituting Mixed Rare Earth Oxides (Sm₂O₃, Gd₂O₃, Eu₂O₃ and CeO₂) for La₂O₃ in La
p.448

On the Sealing Materials for SOFC
p.452

Investigation on Structure and Electrochemical Properties of Li[Ni_1/3Co_1/3Mn_1/3]O₂ for Lithium Ion Batteries
p.455

Electrochemical Performance of Al₂O₃-Coated LiNi_1/3Co_1/3Mn_1/3O₂ Cathode Materials for Li-Ion Batteries
p.459

Synthesis and Electrochemical Properties of a LiNi_0.7Co_0.3O_1.9Cl_0.1 Cathode Material for Lithium-Ion Battery
p.463

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Preparation and Electrical Properties of Interconnect Material Made by Substituting Mixed Rare Earth Oxides (Sm₂O₃, Gd₂O₃, Eu₂O₃ and CeO₂) for La₂O₃ in La

Abstract:

La1-xCaxCrO3 (0.1≤ x ≤ 0.4) is usually used as interconnect material for solid oxide fuel cells (SOFCs). In this paper, composite material, the two-phase mixtures of face-centered cubic fluorite structure CayCe1-yO2-y (0 ≤ y≤ 0.2) and orthorhombic perovskite structure [Sm(Eu,Gd)]1-zCazCrO3 (0 < z < 0.3), was prepared by an auto-ignition process in which mixed rare earth oxides (Sm2O3, Gd2O3, Eu2O3 and CeO2) are substituted for La2O3 in La1-xCaxCrO3. The direct current (DC) four-probe technique measurement indicated that the electrical conductivities of specimens increased along with the increase of Ca2+ content (x), especially when x=0.3 and 0.4. The material (x=0.4, about 94% relative density) showed excellent electrical conductivities of 48 Scm-1 in air and 13 Scm-1 in H2 (purity 99.999%) at 700°C respectively, which is about 3 times as high as that of La0.7Ca0.3CrO3.

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Key Engineering Materials (Volumes 336-338)

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448-451

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https://doi.org/10.4028/www.scientific.net/KEM.336-338.448

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April 2007

Authors:

Hong Hai Zhong, Ji Gui Cheng, Xing Qin Liu, Guang Yao Meng

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Ceramic, Composite Material, Electrical Conductivity, Solid Oxide Fuel Cell (SOFC)

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