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THREE-LAYER CO-FIRING FABRICATION OF LaCrO3-BASED CERAMIC INTERCONNECT, COMPOSITE ANODE SUPPORT AND YSZ ELECTROLYTE |
WANG Songlin 1,2, FENG Yi2, WANG Dongsheng1, WANG Jingwen1 |
1. Department of Mechanical Engineering, Tongling University, Tongling 244061
2. Department of Materials Science and Engineering, Hefei University of Technology, Hefei 230009 |
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Cite this article:
WANG Songlin, FENG Yi, WANG Dongsheng, WANG Jingwen. THREE-LAYER CO-FIRING FABRICATION OF LaCrO3-BASED CERAMIC INTERCONNECT, COMPOSITE ANODE SUPPORT AND YSZ ELECTROLYTE. Acta Metall Sin, 2012, 48(5): 587-592.
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Abstract Developing cost-effective methods to prepare dense ceramic interconnect membrane for solid oxide fuel cell (SOFC) stacks is currently considered as a major technical obstacle. In order to improve the co-firing compatibility of LaCrO3-based interconnects with the traditional YSZ-based SOFC anode support NiO/YSZ, interconnect material of La0.7Ca0.3Cr0.97O3-δ(LCC) was introduced to NiO/YSZ anode. Triple-phase composite NiO/YSZ/LCC was prepared, and then examined as novel anode support. Sintering character, microstructure, electrical conductivity, and thermal expansion coefficient of the composite anode were investigated in detail as a function of LCC addition, respectively. Results indicated that the NiO/YSZ/LCC composite anode had excellent overall performance. Furthermore, by using a simple drop-coating process, LCC and YSZ wet membranes were prepared on the opposite surfaces of NiO/YSZ/LCC support, respectively. Followed by three-layer co-firing at 1400℃ in air for 4 h, dense La0.7Ca0.3Cr0.97O3-δ interconnect and YSZ electrolyte thin membranes were both successfully prepared on the porous NiO/YSZ/LCC anode support. This work presents a simple drop-coating/three-layer co-firing technical route for developing dense interconnect and electrolyte membranes for YSZ-based SOFC stacks.
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Received: 24 February 2012
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Fund: National Natural Science Foundation of China |
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