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HomeKey Engineering MaterialsKey Engineering Materials Vol. 697Electrical Properties of...

Electrical Properties of Y_0.06Sr_0.94Ti_0.6Fe_0.4O_3-δ-YSZ Composites as Electrode Materials

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Abstract:

Y0.06Sr0.94Ti0.6Fe0.4O3-δ-YSZ composites were prepared by mixing Y, Fe co-doped SrTiO3 (Y0.06Sr0.94Ti0.6Fe0.4O3-δ known as YSTF) and 8 mol% Y2O3 stabilized ZrO2 (YSZ) in different weight fractions. The phase stability, phase compatibility, microstructure and mixed ionic-electronic conductivity of composites were investigated. Phase analysis by XRD showed no clearly detectable secondary phases. The electrical conductivity measurement on the YSTF-YSZ composites showed a drastic decrease in total electrical and ionic conductivities when more than 10 wt% of YSZ was used in the composites. The total electrical conductivity was 0.102 S/cm for Y0.06Sr0.94Ti0.6Fe0.4O3-δ and 0.043 S/cm for YSTF-20YSZ at 700 oC, respectively. The value at 700 oC is approximately 2.4 times higher than that of YSTF-20YSZ. The ionic conductivity of Y0.06Sr0.94Ti0.8Fe0.2O3-δ varies from 0.015S/cm at 700 oC to 0.02 S/cm at 800 oC, respectively. The value at 800°C is approximately 12.5 times higher than YSTF-20YSZ. The ion transference numbers of YSTF-YSZ composites vary from 0.14 to 0.28 at 800 °C.

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High-Performance Ceramics IX

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Periodical:

Key Engineering Materials (Volume 697)

Pages:

327-330

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.697.327

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Online since:

July 2016

Authors:

Ke Shan, Xing Min Guo, Feng Rui Zhai, Zhong Zhou Yi*

Keywords:

Diffusion, Electrical Properties, Electronic Conductivity, Ionic Conductivity, Y_0.06Sr_0.94Ti_0.6Fe_0.4O_3-δ-YSZ

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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