Synthesis and Study on Ionic Conductive Bi1−x,VxO1.5−δ Materials with a Dual-Phase MicrostructureReport as inadecuate


Synthesis and Study on Ionic Conductive Bi1−x,VxO1.5−δ Materials with a Dual-Phase Microstructure


Synthesis and Study on Ionic Conductive Bi1−x,VxO1.5−δ Materials with a Dual-Phase Microstructure - Download this document for free, or read online. Document in PDF available to download.

Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan





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Academic Editor: Christof Schneider

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. View Full-Text

Keywords: solid oxide fuel cell SOFC; conductor; bismuth oxide; vanadium oxide; electrical conductivity solid oxide fuel cell SOFC; conductor; bismuth oxide; vanadium oxide; electrical conductivity





Author: Yu-Wei Lai and Wen-Cheng J. Wei *

Source: http://mdpi.com/



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