synthesis and study on ionic conductive (bi1−x,vx)o1.5−δ materials with a dual-phase microstructure

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ID: 163378
2016
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Abstract
Homogeneous Bi2O3-V2O5 powder mixtures with different amounts of V2O5 content (≤15 mol%) were prepared by colloidal dispersion and sintering to high density. The sintered and annealed samples were studied by thermal analysis, quantitative X-ray diffraction and scanning electron microscopy. The electrical and ionic conductivities of the conductors were also measured by a four-probe direct current (DC) method. The results of the samples prepared at 600–800 °C and annealed for as long as 100 h show that the sintered samples consisting of a pure γ phase or δ + γ binary phase perform differently in conductivity. The highly conductive δ phase in the composition of Bi0.92V0.08O1.5−δ enhances the electric conductivity 10-times better than that of the pure γ-sample (Bi0.94V0.06O1.5−δ) between 400 and 600 °C. The compatible regions of the γ phase with the α- or δ phase are also reported and discussed, so a part of the previously published Bi2O3-V2O5 phase diagram below 800 °C is revised.
Reference Key
lai2016materialssynthesis Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Yu-Wei Lai;Wen-Cheng J. Wei
Journal Nature Materials
Year 2016
DOI
10.3390/ma9110863
URL
http://www.mdpi.com/1996-1944/9/11/863
Keywords
solid oxide fuel cell (sofc) vanadium oxide electronics civil engineering (general)microscopydescriptive and experimental mechanics nuclear engineeringengineering (general)

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