Improved ionic conductivity of zirconia-scandia with niobia addition
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2017
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Ceramics International
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The ionic conductivity and the crystalline structure of ZrO2−10 mol% Sc2O3- x mol% Nb2O5 solid electrolytes
were investigated for x=0.25, 0.5 and 1. Dense specimens with relative densities higher than 95% were prepared
by solid state reaction and sintered at 1500 °C for 5 h. Full stabilization of the cubic structure at room
temperature was obtained for compounds with x=0.5 and 1, whereas the cubic and rhombohedric structures
coexist for x=0.25. The highest ionic conductivity in codoped system was found for specimen containing 0.5 mol
% niobium pentoxide, with the same order of magnitude as that of the parent solid electrolyte (zirconia-10 mol
% scandia) in the high temperature range (above 600 °C). Preliminary investigation on phase stability shows
that the isothermal conductivity of the new solid electrolyte remained constant up to 100 h at 600 °C. Niobium
pentoxide addition was found to improve the overall ionic conductivity of zirconia-scandia solid electrolyte.
Como referenciar
GROSSO, ROBSON L.; REIS, S.L.; MUCCILLO, E.N.S. Improved ionic conductivity of zirconia-scandia with niobia addition. Ceramics International, v. 43, n. 14, p. 10934-10938, 2017. DOI: 10.1016/j.ceramint.2017.05.131. Disponível em: http://repositorio.ipen.br/handle/123456789/27837. Acesso em: 06 Jun 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.