Electrical Properties of Y&lt;sub&gt;0.06&lt;/sub&gt;Sr&lt;sub&gt;0.94&lt;/sub&gt;Ti&lt;sub&gt;0.6&lt;/sub&gt;Fe&lt;sub&gt;0.4&lt;/sub&gt;O&lt;sub&gt;3-δ&lt;/sub&gt;-YSZ Composites as Electrode Materials

Ke Shan; Xing Min Guo; Feng Zhai; Zhong Zhou Yi

doi:10.4028/www.scientific.net/kem.697.327

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JOURNAL ARTICLE

Electrical Properties of Y0.06Sr0.94Ti0.6Fe0.4O3-δ-YSZ Composites as Electrode Materials

Ke Shan Xing Min Guo Feng Zhai Zhong Zhou Yi

Year: 2016 Journal: Key engineering materials Vol: 697 Pages: 327-330 Publisher: Trans Tech Publications

DOI: 10.4028/www.scientific.net/kem.697.327

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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.

Keywords:

Materials science Electrical resistivity and conductivity Yttria-stabilized zirconia Microstructure Analytical Chemistry (journal) Ionic conductivity Conductivity Ionic bonding Phase (matter) Doping Composite material Ion Chemistry Electrode Ceramic Cubic zirconia Electrical engineering Physical chemistry

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Electrical Properties of Y<sub>0.06</sub>Sr<sub>0.94</sub>Ti<sub>0.6</sub>Fe<sub>0.4</sub>O<sub>3-δ</sub>-YSZ Composites as Electrode Materials

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