| 초록 |
Solid oxide fuel cells (SOFCs) convert chemical energy of H2 and O2 to electrical energy. Tape casting fabricates green tapes by casting the slurry mixture of ceramic powder, binder, plasticizer, dispersant and solvent. The fabricated green tapes are heat-treated to form final unit cells so the slurry mixture is the most significant. High solid loading and binder concentration are required but changes rheological behavior and high viscosity as they increase network strength of particles in green tapes, leading to higher electrochemical performance of SOFC. In this study, to fabricate green tapes with high particle network by increasing solid loading and binder concentration, a method to control slurry and tape characteristics by changing solvent ratio in tape cast slurry is proposed. As a result, uniform green tapes with good flexure strength and packing density are fabricated with well-controlled slurry composition and rheological characteristics. |
