Influence of gallium-based additives on microstructure and ionic conductivity of doped-lanthanum gallate
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2018
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CONFERENCE ON ELECTRONIC AND ADVANCED MATERIALS
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Resumo
Sr- and Mg-doped lanthanum gallate is a well known oxide-ion
conductor with potential application in Solid Oxide Fuel Cells operating
at intermediate temperatures (500-700oC). One of the main
concerns on this solid electrolyte is related to impurity phases,
frequently observed even in chemically synthesized powders, due
to gallium loss during sintering. La0.9Sr0.1Ga0.8Mg0.2O3-d, LSGM,
containing small amounts of Ga2O3 and Sr3Ga2O6 were prepared
by solid state reaction, and the effects of the additives on microstructure
and ionic conductivity were investigated after sintering at
1350oC. Gallium oxide addition promoted grain growth of LSGM
and increased the fraction of the gallium-rich impurity phase. In
contrast, strontium gallate addition favored reduction of the fraction
of impurity phases. The intragrain conductivity of LSGM increases
with gallium oxide addition, whereas strontium gallate improved
both the intra- and the intergrain conductivities of LSGM.
Como referenciar
REIS, S.L.; MUCCILLO, E.N. Influence of gallium-based additives on microstructure and ionic conductivity of doped-lanthanum gallate. In: CONFERENCE ON ELECTRONIC AND ADVANCED MATERIALS, January 17-19, 2018, Orlando, Florida, USA. Abstract... Westerville, OH, USA: The American Ceramic Society, 2018. p. 73-73. Disponível em: http://repositorio.ipen.br/handle/123456789/30201. Acesso em: 10 May 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.