High temperature percolation of carbonate ions through porous alumina and zirconia-magnesia impregnated with alkali carbonates
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2021
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BRAZIL MRS MEETING, 19th; INTERNATIONAL UNION OF MATERIALS RESEARCH SOCIETIES - INTERNATIONAL CONFERENCE ON ELECTRONIC MATERIALS
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Na2CO3-K2CO3 (56-44 wt.%) eutectic composition was vacuum-impregnated into porous Al2O3
(alumina) and to ZrO2: 3 wt.% MgO (magnesium-partially stabilized zirconia, Mg-PSZ) at the
molten eutectic temperature. Porosity was achieved in the two compounds by addition and
thermal removal of the eutectic composition before impregnation. The parallel surfaces of
disk-shaped impregnated compositions were observed in a scanning electron microscope.
The CO3
2- carbonate ion conductivity of the two composite ceramics was measured by
electrochemical impedance spectroscopy in the 5 Hz-13 MHz frequency range from 470ºC to
780ºC. The permeation of the carbonate ions via eutectic composition through the ceramic
membranes was ascertained by the threshold temperatures of the onset of the carbonate ion
percolation: 660ºC and 720ºC for alumina and Mg-PSZ, respectively.
Como referenciar
DENALDI, RAFAEL L.; MUCCILLO, REGINALDO. High temperature percolation of carbonate ions through porous alumina and zirconia-magnesia impregnated with alkali carbonates. In: BRAZIL MRS MEETING, 19th; INTERNATIONAL UNION OF MATERIALS RESEARCH SOCIETIES - INTERNATIONAL CONFERENCE ON ELECTRONIC MATERIALS, August 30 - September 3, 2021, Online. Abstract... São Carlos, SP: Aptor Software, 2021. p. 305-305. Disponível em: http://repositorio.ipen.br/handle/123456789/32835. Acesso em: 30 Dec 2025.
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