Influence of yttria-stabilized zirconia on microstructure and electrical properties of doped lanthanum gallate
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2019
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Materials Research
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Lanthanum gallate with partial substitutions for strontium and magnesium shows higher ionic
conductivity than traditional ionic conductors such as yttria-stabilized zirconia (8YSZ), and has
been considered for application as solid electrolyte and electrode in Solid Oxide Fuel Cells operating
at intermediate temperatures (500-700ºC). Parallel to the development of new solid electrolytes,
improvement of the already known electrolytes has been one goal. In this work, the effects of adding
8YSZ to La0.9Sr0.1Ga0.8Mg0.2O3-δ (LSGM), on the microstructure and electrical performance were
investigated. Compound electrolytes consisting of up to 20 wt.% 8YSZ were prepared by solid state
reactions. Sintered pellets with up to 10 wt.% 8YSZ achieved near full density after sintering at
1450ºC and reduction in the fraction of impurity phases. Addition of 8YSZ promoted grain growth to
LSGM. The higher ionic conductivity was obtained for 1 wt.% 8YSZ addition with slight decrease
of the apparent activation energy.
Como referenciar
FUJIMOTO, TALITA G.; REIS, SHIRLEY L.; MUCCILLO, ELIANA N. dos S. Influence of yttria-stabilized zirconia on microstructure and electrical properties of doped lanthanum gallate. Materials Research, v. 22, p. 1-6, 2019. S1. DOI: 10.1590/1980-5373-MR-2019-0043. Disponível em: http://repositorio.ipen.br/handle/123456789/30438. Acesso em: 19 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.