Abstract: NiO particles and YSZ particles are mixed with each other at a predetermined ratio. A binder is added, followed by being dispersed in a solvent to prepare granular particles by a spray drying method. The particles are used to obtain a compact by press forming. A YSZ paste is printed on one end surface of the compact, and the compact and the paste are sintered together to prepare an anode and a solid electrolyte. A paste of La0.6Sr0.4MnO3 is printed on one exposed end surface of the solid electrolyte, followed by being heated to calcine a cathode. Thus, an electrolyte-electrode joined assembly is obtained.

Abstract: A flattening layer is provided between an anode and a solid electrolyte. The flattening layer has a porosity which is set to be smaller than that of the anode. Large diameter pores, which are open at an end surface of the anode on a side facing the solid electrolyte, are filled with the flattening layer, and projections, which bulge out of the end surface, are buried therewith to flatten the projections. Therefore, when the solid electrolyte is formed on the flattening layer, the solid electrolyte is prevented from any depressions and bulges on which stress is concentrated.

Abstract: NiO particles and YSZ particles are mixed with each other at a predetermined ratio. A binder is added, followed by being dispersed in a solvent to prepare granular particles by a spray drying method. The particles are used to obtain a compact by press forming. A YSZ paste is printed on one end surface of the compact, and the compact and the paste are sintered together to prepare an anode and a solid electrolyte. A paste of La0.6Sr0.4MnO3 is printed on one exposed end surface of the solid electrolyte, followed by being heated to calcine a cathode. Thus, an electrolyte-electrode joined assembly is obtained.

Abstract: A flattening layer is provided between an anode and a solid electrolyte. The flattening layer has a porosity which is set to be smaller than that of the anode. Large diameter pores, which are open at an end surface of the anode on a side facing the solid electrolyte, are filled with the flattening layer, and projections, which bulge out of the end surface, are buried therewith to flatten the projections. Therefore, when the solid electrolyte is formed on the flattening layer, the solid electrolyte is prevented from any depressions and bulges on which stress is concentrated.

Abstract: A swash-plate hydraulic pressure device for use as a hydraulic pump or motor includes a cylinder block having an annular array of cylinder holes defined therein around an axis. A plurality of plungers of a ceramic material are reciprocally movably disposed in the cylinder holes, respectively, the plungers having respective partly spherical tip ends. A swash plate of metal is disposed around the cylinder block for rotation with respect to the cylinder block, the swash plate having a annular groove of a partly spherical cross section defined therein and, the partly spherical tip ends of the plungers engaging in the groove. The tip ends of the plungers preferably have a pore area percentage of at most 7.8% and a maximum surface roughness of at most 1.6 s. The partly spherical tip end of each of the plungers has a radius R.sub.0 of curvature, each of the plungers has a diameter D, the groove has a radius R.sub.1 of curvature and a depth E. The ratios R.sub.0 /D, R.sub.0 /R.sub.1, and E/R.sub.