抄録
Flame spray pyrolysis technology makes use of the high chemical activity of a flame. A metal salt aqueous solution or slurry is used as the starting material and is atomized into a flame or furnace. The solvent in the sprayed minute liquid droplets evaporates, pyrolysis occurs, and then solid particles are sintered. We focused on the spray pyrolysis method for preparation of LSM/ScSZ composite powder for use as the SOFC cathodes. We utilized a gas combustion system as the heat source that is characterized by the fact that its operation costs can be much less than that of conventional electric heating systems. On the other hand, in-flame treatment technology uses the high-temperature environment within a flame. The starting material is used fine ceramic powders, and is introduced directly into an oxygen flame to be melted. The technology related to in-flame melting of ceramic powder, which has already been established, is a typical example of this type of technology, which is based on the principle that a material is melted within a flame and spheroidized as a result of its surface tension.
