Synthesis and Sintering of La0.8Sr0.2CrO3 for the Separator of SOFC
The ultrasonic spray pyrolysis method and proper heat treatments were applied in order to synthesize La0.8Sr0.2CrO3 (LSC) which is one of promising materials for separator in soild oxide fuel cell in this study. LSC powders that were sprayed at 800oC, heat-treated at 900oC for 5 hrs, ball-milled and finally heat-treated again at 1200oC for 20 hrs showed the average diameter of 0.3 *m and narrow size distribution to find particles above 0.5 *m hardly. In addition, the synthesizing temperature of LSC powders in ultrasonic spray pyrolysis method was 100 lower than conventional ball milling and drying method. Therefore the proper combination of heat treatment and milling process after spray pyrolysis was found to be very critical in synthesizing fine and uniform LSC powders. Finally, the sintering properties of these LSC powders were analyzed and compared with those of conventional ones.
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
S. I. Hwang et al., "Synthesis and Sintering of La0.8Sr0.2CrO3 for the Separator of SOFC", Materials Science Forum, Vols. 544-545, pp. 1069-1072, 2007