Influence of starch content and sintering temperature on the microstructure of porous yttria-stabilized zirconia tapes
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Journal of Materials Science
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Porous yttria-stabilized zirconia (YSZ) substrates with volume fractions of porosity ranging from 28.9
to 53 vol.% were developed using starch as a fugitive
additive. Concentrated aqueous YSZ slips with different
amounts of starch and an acrylic latex binder were prepared. The influence of the volume fraction of starch and
sintering temperature on the sintering behavior and final
microstructure were investigated. Two kinds of pores were
observed in the sintered tapes: large pores created by the
starch particles with lengths between 15 and 80 lm and
smaller pores in the matrix with lengths between 0.6 and
3.8 lm. The porosities were above those predicted for each
of the starch contents. However, larger deviations from the
predicted porosity were found as more starch was added.
The top surface of the sintered tapes had a greater porosity
than the bottom one for all the starch contents examined.
The total porosity and the percentage of open porosity in
the sintered tapes could be controlled by the volume fraction of added starch as well as by the sintering temperature.
The open pores between the YSZ particles were removed
by sintering at 1600 C. As the volume fraction of starch
increased from 17.6 to 37.8 vol.%, there was a gradual
increase in the interconnectivity of the pore structure.
Como referenciar
ALBANO, MARIA P.; GARRIDO, LILIANA B.; PLUCKNETT, KEVIN; GENOVA, LUIS A. Influence of starch content and sintering temperature on the microstructure of porous yttria-stabilized zirconia tapes. Journal of Materials Science, v. 44, n. 10, p. 2581-2589, 2009. DOI: 10.1007/s10853-009-3337-7. Disponível em: http://repositorio.ipen.br/handle/123456789/4828. Acesso em: 30 Dec 2025.
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