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Evaluation of electrical conductivity and density of 8 mol% yttria-stabilized zirconia produced by Spark Plasma Sintering

Polla, P. T. B.; Valentini, M. I.; Junior, N. V.; Berton, M. A. C.; Conceição, L. da;

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In this work, 8 mol% yttria-stabilized zirconia (8%YSZ) containing micro or nanoparticles were manufactured by Spark Plasma Sintering technique, in order to improve sample densification and control grain growth. The electrical conductivity of dense 8%YSZ pellets sintered was investigated by electrochemical impedance spectroscopy (EIS). Preliminary results showed for samples produced from both micro and nanoparticle sintered at 1000 °C for 5 min, the relative density is approximately 98 %, while for the others samples sintered at 1200 °C the density is above 99 %. These densities are higher in comparison to the same composite sintered by conventional method. The electrical measurements were carried out at 500 °C in air and the best results were obtained for samples with nano particle size in comparison with micro granulometry. The SPS process allows using lower temperatures and shorter times to produce materials with high density and controlled grain growth.

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Palavras-chave: 8%YSZ, Spark Plasma Sintering, relative density, ionic conductor, solid electrolyte,

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DOI: 10.5151/chempro-s3ie2016-11

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Como citar:

Polla, P. T. B.; Valentini, M. I.; Junior, N. V.; Berton, M. A. C.; Conceição, L. da; "Evaluation of electrical conductivity and density of 8 mol% yttria-stabilized zirconia produced by Spark Plasma Sintering", p. 123-135 . In: Proceedings of 2nd International Seminar on Industrial Innovation in Electrochemistry . São Paulo: Blucher, 2016. São Paulo: Blucher, 2016.
ISSN 2318-4043, DOI 10.5151/chempro-s3ie2016-11

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