Ionic conductivity and phase stabilization in zirconia-scandia-europia
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2018
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INTERNATIONAL CONFERENCE & EXPOSITION ON ADVANCED CERAMICS AND COMPOSITES, 42nd
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Resumo
Zirconia-8 mol% yttria is widely used as electrolyte in solid oxide
fuel cells, due to its high ionic conductivity and good mechanical
and chemical properties. Nevertheless, scandia-stabilized zirconia
is recognized as exhibiting the highest ionic conductivity among
zirconia-based solid electrolytes. Stabilization of the high symmetry
and high ionic conductivity cubic phase in this system is non-trivial.
Introduction of a second additive (or dopant) is a usual strategy to
overcome that constraint. In this work, europium oxide has been
added to 10 mol% scandia-stabilized zirconia (10ScSZ) aiming full
stabilization of the cubic structure at room temperature. The influence
of europia addition (up to 1.25 mol%) on phase stabilization
and ionic conductivity of 10ScSZ was investigated by differential
scanning calorimetry and impedance spectroscopy. The higher is the
fraction of europia into solid solution the lower is the temperature
of the endothermic event due to phase transition. The cubic phase
is fully stabilized at room temperature for 1 mol% europia addition.
The grain and total ionic conductivity show typical Arrhenius
behavior. The magnitude of the total conductivity increases with
increasing europia addition.
Como referenciar
SOUZA, J.P.; MUCCILLO, E.N. Ionic conductivity and phase stabilization in zirconia-scandia-europia. In: INTERNATIONAL CONFERENCE & EXPOSITION ON ADVANCED CERAMICS AND COMPOSITES, 42nd, January 21-26, 2018, Daytona Beach, Florida, USA. Abstract... Westerville, OH, USA: The American Ceramic Society, 2018. p. 97-97. Disponível em: http://repositorio.ipen.br/handle/123456789/30207. Acesso em: 24 Mar 2026.
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.