抄録
During co-firing of multilayer ceramics related to Solid Oxide Fuel Cells, warpage is frequently observed due to the mismatch in the sintering shrinkage. The mismatch in sintering shrinkage and relative viscosity of each layer mainly influence warpage. However, if materials are fixed in multilayer co-firing system, the only factor that influences warpage is the thickness ratio of individual layers. The NiO/YSZ and LaSrMnO3/YSZ bilayers, prepared by screen printing on the YSZ tape, warped seriously during co-firing. When NiO or LaSrMnO3 electrodes were applied on dense YSZ instead of green tape, warpage was significantly reduced due to the high viscosity of YSZ. However, loading is still necessary to obtain warpage free co-fired ceramics, if the thickness of YSZ is to be reduced to enhance ionic conductivity. The loading schedule must be carefully selected after considering the viscosity change.
