Electric field-assisted pressureless sintering of ceramic protonic conductors
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Gadolinium, yttrium and samarium-doped barium cerate pressed
pellets were submitted to flash sintering experiments isothermally
in the temperature range 800-1300oC under 200 V cm-1 electric
field. The pellets were positioned inside a dilatometer furnace with
Pt-Ir electrodes connected either to a power supply or to an
impedance analyzer to evaluate the bulk and the grain boundary
contributions to the electrical resistivity. Near full density was
achieved in the sintered samples. The combined results of
dilatometry and impedance measurements in conventionally and
flash sintered specimens show substantial improvement of the
electrical conductivity. Joule heating is assumed to be the primary
effect for sintering. Improved grain-to-grain contact and the
removal of depleted chemical species due to Joule heating at the
space charge region are proposed, respectively, as the reasons for
the decrease of the grain boundary component in the impedance
diagrams and the improvement of the bulk electrical conductivity.
Como referenciar
MUCCILLO, R.; ESPOSITO, V.; FLORIO, D.Z. de; MUCCILLO, E.N.S. Electric field-assisted pressureless sintering of ceramic protonic conductors. ECS Transactions, v. 80, n. 09, p. 111-118, 2017. DOI: 10.1149/08009.0111ecst. Disponível em: http://repositorio.ipen.br/handle/123456789/28541. Acesso em: 30 Dec 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.