Properties of La2-xSrxMo2-yWyO9-δ Oxide-Ion Conductor Synthesized by Citrate Gel Method

Witoon Thepsuwan; Sutin Kuharuangrong

doi:10.4028/www.scientific.net/AMR.93-94.509

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 93-94Properties of La2-xSrxMo2-yWyO9-δ Oxide-Ion...

Properties of La_2-xSr_xMo_2-yW_yO_9-δ Oxide-Ion Conductor Synthesized by Citrate Gel Method

Abstract:

Properties of La2-xSrxMo2-yWyO9-δ (x = 0-0.2, y = 0-0.3) synthesized via citrate gel method have been investigated on phase, oxidation state, microstructure and electrical conductivity. The XRD results show a single phase after calcination at 700 oC for all compositions. The oxidation state of Mo in La2-xSrxMo2-yWyO9-δ compositions determined by X-ray Absorption Near Edge Structure (XANES) is found to be +6. The average grain size of sintered compositions increases with the amount of Sr but slightly decreases with an addition of W. At 500 oC, all doped compositions exhibit higher conductivity as compared to 5.42×10-4 S∙cm-1 for undoped-La2Mo2O9. In this work, the composition of La1.9Sr0.1Mo2O9-δ performs the highest conductivity value of 1.95×10-3 S∙cm-1.

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Periodical:

Advanced Materials Research (Volumes 93-94)

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509-512

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https://doi.org/10.4028/www.scientific.net/AMR.93-94.509

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Online since:

January 2010

Authors:

Witoon Thepsuwan, Sutin Kuharuangrong

Keywords:

Electrical Conductivity, La₂Mo₂O₉, X-Ray Absorption Near-Edge Structure (XANES)

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