Structure and conductivity of rutile niobium iron titanate

Peter Ian Cowin, Christophe TG Petit, Rong Lan, Carl J Schaschke, Shanwen Tao

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

The structure and electrical conductivity of the solid solution FexTi1-2xNbxO2-delta (x = 0.1, 0.2, 0.3) have been investigated. A solid solution with the rutile structure is observed, along with an increase in unit cell volume with increasing substitution. The conductivity in 5 H-2/Ar reduced with increasing doping levels, reaching a maximum of 2.67 S cm(-1) at 700 degrees C for Fe0.1Ti0.8Nb0.1O2-delta. None of the compounds in this series were redox stable at 700 degrees C in 5 H-2/Ar, with increasing amounts of a haematite secondary phase observed with increased doping levels. Reduction at 900 degrees C in 5 H-2/Ar caused a significant increase in conductivity (8.34 S cm(-1) in 5 H-2/Ar) at 700 degrees C, suggesting that only partial reduction occurs at lower temperatures. The lack of redox stability and relatively low conductivities of these materials makes them unsuitable as a component of composite anode for IT-SOFC.
Original languageEnglish
Pages (from-to)48 - 53
Number of pages6
JournalSolid State Ionics
Volume236
DOIs
Publication statusPublished - 2013
Externally publishedYes

Cite this

Cowin, P. I., Petit, C. TG., Lan, R., Schaschke, C. J., & Tao, S. (2013). Structure and conductivity of rutile niobium iron titanate. Solid State Ionics, 236, 48 - 53. https://doi.org/10.1016/j.ssi.2013.01.017
Cowin, Peter Ian ; Petit, Christophe TG ; Lan, Rong ; Schaschke, Carl J ; Tao, Shanwen. / Structure and conductivity of rutile niobium iron titanate. In: Solid State Ionics. 2013 ; Vol. 236. pp. 48 - 53.
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abstract = "The structure and electrical conductivity of the solid solution FexTi1-2xNbxO2-delta (x = 0.1, 0.2, 0.3) have been investigated. A solid solution with the rutile structure is observed, along with an increase in unit cell volume with increasing substitution. The conductivity in 5 H-2/Ar reduced with increasing doping levels, reaching a maximum of 2.67 S cm(-1) at 700 degrees C for Fe0.1Ti0.8Nb0.1O2-delta. None of the compounds in this series were redox stable at 700 degrees C in 5 H-2/Ar, with increasing amounts of a haematite secondary phase observed with increased doping levels. Reduction at 900 degrees C in 5 H-2/Ar caused a significant increase in conductivity (8.34 S cm(-1) in 5 H-2/Ar) at 700 degrees C, suggesting that only partial reduction occurs at lower temperatures. The lack of redox stability and relatively low conductivities of these materials makes them unsuitable as a component of composite anode for IT-SOFC.",
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Cowin, PI, Petit, CTG, Lan, R, Schaschke, CJ & Tao, S 2013, 'Structure and conductivity of rutile niobium iron titanate', Solid State Ionics, vol. 236, pp. 48 - 53. https://doi.org/10.1016/j.ssi.2013.01.017

Structure and conductivity of rutile niobium iron titanate. / Cowin, Peter Ian; Petit, Christophe TG; Lan, Rong; Schaschke, Carl J; Tao, Shanwen.

In: Solid State Ionics, Vol. 236, 2013, p. 48 - 53.

Research output: Contribution to journalArticleResearchpeer-review

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