Synthesis of La0.85Sr0.15Ga0.85Mg0.15O2.85 materials for SOFC applications by acrylamide polymerization

The La0.85Sr0.15Ga0.85Mg0.15O2.85 (LSGM) powders are synthesized using a novel method based on acrylamide polymerization technique. The phase evolution was determined by using XRD analysis. The sintering property was studied by using dilatability analysis. The electrical conductivity was also measured. XRD pattern indicates that the perovskite phase is formed at 1000 °C, and the impurity phase, LaSrGa3O7 still exists in the sintered sample. The shrinkage curve shows that the fast sintering temperature is 1432 °C. The sinterability was investigated as a function of sintering time and temperature. The results show that the densification rate of the sample was fast at first 5 h. The electrical conductivity was 0.093 S/cm at 800 °C. And a transitional temperature in the Arrhenius plot is 700 °C.