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- W1990321921 abstract "The solid solubilities of potential B-site dopants in LaNb1-xMxO4−δ, materials, M=Ga, Ge, Si, Al, B, P, Zr or Ti, have been investigated in the search for possible novel proton conductors. In general, the solubility levels of these cations were found to be very low (x≤0.03). At the maximum value x=0.03, only compositions containing Ti, Ge, Ga and Si appeared pure at the limit of resolution of XRD. The literature phase diagram, La2O3–Nb2O5–ZrO2, has been re-analysed for compositions of low Zr-content around the composition LaNbO4. The electrical properties of phase pure Ti-doped compositions have been studied. Higher bulk and total conductivities were observed in wet than dry conditions, suggesting a significant protonic contribution to total conductivity. In wet conditions, the activation energy for bulk conductivity of LaNb0.98Ti0.02O4–δ was found to be much higher than that of an A-site, Sr-doped material, Sr0.02La0.98NbO4–δ, of similar acceptor dopant concentration. The Sr-doped composition offered higher conductivities than the Ti-doped composition up to approximately 900°C." @default.
- W1990321921 created "2016-06-24" @default.
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- W1990321921 date "2011-04-01" @default.
- W1990321921 modified "2023-09-26" @default.
- W1990321921 title "B-site substitutions in LaNb1−xMxO4−δ materials in the search for potential proton conductors (M=Ga, Ge, Si, B, Ti, Zr, P, Al)" @default.
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- W1990321921 doi "https://doi.org/10.1016/j.jssc.2011.02.012" @default.
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