2012 年 1 巻 4 号 p. 178-181
Dendritic electrodes composed of yttria stabilized zirconia (YSZ) and nickel oxide (NiO) were successfully fabricated by using micro stereolithography for solid oxide fuel cells. The dendritic structures constructed from micrometer order ceramic rods with coordination numbers of 4, 6, 8, and 12 were designed in computer graphic application. Range of aspect ratios determined by rod diameters and lengths was varied from 0.75 to 3.00. Gaseous fluid permeabilities in the dendritic lattices were simulated and visualized by using finite volume methods. The dendritic lattice with 12 coordination number was verified to exhibit the largest surface area and smooth fluid transparent characteristics. The optimized dendritic structure of 100 μm in lattice constant was fabricated by using micro stereolithography. Composite precursors of acrylic resin and nanometer sized YSZ and Ni particles were dewaxed at 600 °C for 2 hs and sintered at 1350-1450 °C for 2 hs. Microstructures were observed by using optical and scanning electron microscope.