Firing characteristics of La0.8Sr0.2Ga0.8Mg0.2O3-δ electrolyte powders prepared by spray pyrolysis

Dae Soo Jung, Hye Young Koo, Hee Chan Jang, Jung Hyun Kim, Yoon Ho Cho, Jong Heun Lee, Yun Chan Kang

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10 Citations (Scopus)

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 languageEnglish
Pages (from-to)693-697
Number of pages5
JournalJournal of Alloys and Compounds
Volume487
Issue number1-2
DOIs
Publication statusPublished - 2009 Nov 13

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Keywords

  • Ceramics
  • Chemical synthesis
  • Fuel cells

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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