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Effects of A- and B-site (co-)acceptor doping on the structure and proton conductivity of LaNbO4

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Publisher
Elsevier BV North-Holland
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Keywords
  • B-Site And A- And B-Site Co-Doped Lanthanum Niobates
  • La(1-X)Da(X)Nb(1-Y)Db(Y)O(4-δ)
  • Where Da Stands For Ca Or Ba And Db For Ga
  • Ge Or In (X = 0 Or 0
  • 01
  • Y = 0
  • 01)
  • Have Been Synthesized Via The Solid-State Route
  • Essentially Single-Phase Materials Were Obtained After 10 H At 1500 °C With Monoclinic Fergusonite
  • The Unit Cell Volume Increases Slightly With The Presence Of The Acceptor
  • The Electrical Conductivity Of The Materials
  • Characterized As A Function Of The Temperature From 300 °C To 900 °C Under Wet Reducing Conditions
  • Was Dominated By Protons
  • The Maximum Conductivity Of 4
  • 1 · 10−4 S · Cm−1 At 900 °C Was Obtained For La0
  • 99Ca0
  • 01Nb0
  • 99Ga0
  • 01O4-δ
  • Which Is A Factor Of ~ 2
  • 5 Lower Than The Highest Conductivity Reported For The A-Site Ca-Doped Lanbo4
  • Based On A Semi-Quantitative Evaluation It Was Shown That The Hydration Of The B-Site And A- And B-S
  • This Is Accounted For By A Stronger Association Between The Acceptor And The Proton For B-Site Than

Abstract

Effects of A- and B-site (co-)acceptor doping on the structure and proton conductivity of LaNbO4 - DTU Orbit (20/04/14) Ivanova, M.; Ricote, Sandrine; Meulenberg, W.A.; Haugsrud, R.; Ziegner, M. / Effects of A- and B-site (co-)acceptor doping on the structure and proton conductivity of LaNbO4. In: Solid State Ionics, Vol. 213, 2012, p. 45-52. Publication: Research - peer-review › Conference article – Annual report year: 2011

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