Thermal analyses of yttrium-doped barium zirconate with phosphor pentoxide, boron oxide and zinc oxide addition
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2017
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Journal of Thermal Analysis and Calorimetry
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Yttrium-doped barium zirconate (BZY), one of
the protonic conductors considered to be used as solid
electrolyte in solid oxide fuel cells (SOFC) operating at
temperatures lower than the one found in conventional
oxide-ion SOFCs, still presents some challenges to reach
high density and high electrical conductivity: the difficulty
to sinter at temperatures well below its melting point and
the blocking of the conducting species at the grain
boundaries. We describe an experimental sequence to
prepare powders and to obtain highly dense BZY ceramic
pellets with enhanced electrical conductivity, using either
phosphor pentoxide (P2O5), boron oxide (B2O3) or zinc
oxide (ZnO) as sintering aid. The reactions leading to
sintering ceramic pellets with densities higher than 94% of
the theoretical density and improved electrical performance
are monitored by thermal analyses. BZY with the addition
of 5 mass% P2O5 or 2 mass% ZnO shows a tenfold
enhancement of the electrical conductivity.
Como referenciar
MUCCILLO, R.; MUCCILLO, E.N.S.; ANDRADE, T.F.; OLIVEIRA, O.R. Thermal analyses of yttrium-doped barium zirconate with phosphor pentoxide, boron oxide and zinc oxide addition. Journal of Thermal Analysis and Calorimetry, 2017. DOI: 10.1007/s10973-017-6523-x. Disponível em: http://repositorio.ipen.br/handle/123456789/27792. Acesso em: 22 Feb 2025.
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.