Abstract
The preparation of La0.8Sr0.2Ga0.8Mg0.2O3 (LSGM) powders by the mixed oxide route requires significantly longer annealing times of about 60 h compared to the combustion synthesis and Pechini method which requires less than 6 h. In comparison to the mixed oxide route the soft chemical synthesis methods produce significantly smaller grain sizes after solid-state reactive sintering, which is due to the significantly shorter annealing times in order to achieve well crystallized ceramics. It is emphasized that at 1400°C in air single phase LSGM samples with the composition La0.8Sr0.2Ga0.8Mg0.2O3 could be prepared neither by the mixed oxide route nor the combustion synthesis or the Pechini method, but only at higher temperatures, for example 1500°C. Taking the results of the dilatometric studies for processing of LSGM ceramics into account, it is obviously that sinter temperatures of above 1300°C in air are required in order to prepare dense LSGM ceramics.
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Majewski, P., Rozumek, M., Tas, C.A. et al. Processing of (La,Sr)(Ga,Mg)O3 Solid Electrolyte. Journal of Electroceramics 8, 65–73 (2002). https://doi.org/10.1023/A:1015507520661
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DOI: https://doi.org/10.1023/A:1015507520661