Impedance spectroscopy analysis of flash sintered zirconia
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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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Electrical properties of porous ZrO2:8 mol% Y2O3 ceramics with LiF sintering aid were
studied. The specimens were sintered by transient liquid phase formation under the
application at 650ºC of 200 V cm-1 AC electric field for various current density, current
elapsed time, and lithium fluoride content. Low electric current densities coupled with long
application times produced homogeneous specimens. Variations in the electric current
density and current elapsed time allowed to obtain sample densification in the 60%-75%
range. Impedance spectroscopy measurements were carried out to estimate the relative
pore content, evaluating the product of the blocking factor αR (=Rg/(Rg +Rgb), R, g and gb
stand for resistance, grain and grain boundary, respectively) to the frequency factor αf (=
fgb/fg, f is the characteristic frequency), which is proportional to the blocker volume, i.e., the
porosity. A direct correspondence between αR•αf and the apparent porosity, obtained after
determining the apparent density by the Archimedes method, was observed.
Como referenciar
DIAZ, JULIO C.C.A.; MUCCILLO, REGINALDO. Impedance spectroscopy analysis of flash sintered zirconia: 8 mol% yttria solid electrolytes with alkali halide addition. 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. 298-298. Disponível em: http://repositorio.ipen.br/handle/123456789/32837. Acesso em: 30 Dec 2025.
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