AFD(Aerosol Flame Deposition)법에 의한 고체 연료전지용 YSZ 전해질 제조에 관한 연구

Abstract

The aerosol flame deposition technique using oxy-hydrogen flame was employed to prepare thin film of yttria-stabilized zirconia from the liquid sources.The spherical and dense yttria stabilized zirconia particles were synthesized in the submicron range and the particle size distribution was controlled by changing the concentration of the precursor solution and flame conditions. The crystallinity of the synthesized soot powder was reasonably good even in as-prepared state and an additional heat treatment improved the crystallinity to the comparable level of conventional solid state reaction. Mean diameter of particles were approximately 400 ~ 600 nmdepending on the precursor solution and the flame condition. The Transmission Electron Microscopy revealed that particles were polycrystalline composed of approximately 20 nm sized grains. It was demonstrated that the aerosol flame deposition technique is a promising approach to realize inexpensive continuous process technology fabricating micro solid oxide fuel cell devices since this technique realized a reasonable deposition rate with relativelysimple and inexpensive equipment operating under ambient conditions.