THREE-LAYER CO-FIRING FABRICATION OF LaCrO3-BASED CERAMIC INTERCONNECT, COMPOSITE ANODE SUPPORT AND YSZ ELECTROLYTE

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 * 21171131, 1208085QE84, 2012SQRL190ZD KJ2011B185 : 2012–02–24, : 2012–04–06 ! : , , 1973 , , DOI: 10.3724/SP.J.1037.2012.00097