Influence of small amounts of gallium oxide addition on ionic conductivity of La0.9Sr0.1Ga0.8Mg0.2O3-delta solid electrolyte

Autor(es)

Reis, S. L. ^[1] ; Muccillo, E. N. S. ^[1]

Afiliação do(s) autor(es)

^[1] Energy & Nucl Res Inst IPEN, POB 11049, BR-05422970 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 44, n. 1, p. 115-119, JAN 2018.
• Citações Web of Science: 0

Resumo

The effects of small amounts of gallium oxide on intragrain and intergrain conductivity of La0.9Sr0.1Ga0.8Mg0.2O3.delta are investigated by impedance spectroscopy in the 280-420 degrees C range. Bulk specimens with 0.5, 1.0 and 1.5 mol% gallium oxide are prepared by solid state reaction at 1350 degrees C. All specimens achieved relative density values higher than 95%. The additive promotes grain growth indicating solid solution formation. A small fraction of the additive remains at grain boundaries and increases the fraction of the gallium-rich, LaSrGa3O7, impurity phase. The intragrain conductivity of gallium oxide containing specimens is higher than that of the parent solid electrolyte. Similar effect is found for the intergrain conductivity, which is maximum for 1 mol% gallium oxide addition. (AU)

• Processo FAPESP: 96/09604-9 - Laboratório de análise de materiais cerâmicos, metálicos e compósitos por difração de Raios X
• Beneficiário: Reginaldo Muccillo
• Modalidade de apoio: Auxílio à Pesquisa - Programa Infraestrutura - Equipamentos
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs