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

CERAMICS INTERNATIONAL

19 de março de 2019 LAbI UFSCar Artigo 0

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

Abstract: 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.

Author(s): Reis, SL; Muccillo, ENS

CERAMICS INTERNATIONAL

Volume: 44 Pages: 115-119 Published: JAN 2018

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

DOI: 10.1016/j.ceramint.2017.09.139

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O Laboratório Aberto de Interatividade para Disseminação do Conhecimento Científico e Tecnológico (LAbI), vinculado à Universidade Federal de São Carlos (UFSCar), é voltado à prática da divulgação científica pautada na interatividade; nas relações entre Ciência, Arte e Tecnologia.