Abstract
La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) electrolyte powders suitable for use in solid-oxide fuel cells were prepared by spray pyrolysis. The powders were spherical in shape and exhibited non-aggregation characteristics. The mean particle size of the LSGM powders was 0.89 μm. The powders post-treated at temperatures of 1000 and 1300 °C had main crystal structure of LSGM. The powders post-treated at temperatures of 1000 and 1300 °C had impurity peaks of LaSrGa3O7 and LaSrGaO4 phases. Pellets sintered at 1300 and 1400 °C had relative densities of 82% and 95% and mean grain sizes of 2.3 and 3.1 μm, respectively. The pellet sintered at 1400 °C had a lower αgbapp value than that of the pellet sintered at 1300 °C. The total conductivities of the pellets sintered at 1300 and 1400 °C were 1.44 × 10-3 and 2.89 × 10-3 S/cm, respectively, at a low measuring temperature of 500 °C.
Original language | English |
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Pages (from-to) | 693-697 |
Number of pages | 5 |
Journal | Journal of Alloys and Compounds |
Volume | 487 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2009 Nov 13 |
Keywords
- Ceramics
- Chemical synthesis
- Fuel cells
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry