Skip to main content Accessibility help
×
Home

Structure/Property Relations in Bulk Versus Solution Derived Proton Conducting Ceramics of the Form SrCe0.95Yb0.05O3 With Applications in Membrane Separations

  • Kyle Brinkman (a1), Elise B Fox (a2), Paul Korinko (a3), Robert Lascola (a4), Qiang Liu (a5) and Fanglin Chen (a6)...

Abstract

Membrane separations are a key enabling technology for future energy conversion devices. Ionic transport membranes must have both proton and electronic conductivity to function as hydrogen separation membranes without an external power supply. A technical obstacle to material modification by compositional changes is that the hydrogen flux through a dense membrane is a function of both the proton ionic conductivity and the electronic conductivity. An alternative way to modify the materials conductivity without changing the ratio of the chemical constituents is by altering the microstructure. In this study, SrCe0.95Yb0.05O3 was produced by conventional mixed oxide bulk ceramic techniques and chemical solution routes self-rising approaches using urea as the leavening agent. In conventional ceramic processing routes, the perovskite phase was observed to form at temperatures near 1300oC, while solution techniques resulted in perovskite phase formation starting near 1000oC with complete phase transformations occurring at 1100oC. Thermogravimetric analysis (TGA) was conducted in various gas atmospheres resulting in bulk oxide route powders exhibiting a 0.6% weight loss at 800oC under a nitrogen environment as compared to chemically derived powders which displayed weight losses on the order of 3.4%.The increased weight loss observed in chemically derived SrCe0.95Yb0.05O3 is correlated with an increase in the number of electron charge carriers and results in elevated electronic conduction. This study will report on the development of structure property relations in the model proton conducting ceramic system SrCe0.95Yb0.05O3.

Copyright

References

Hide All
1 Phair, J.W. and Badwal, S.P.S., Review of proton conductors for hydrogen separation. Ionics, 2006. 12(2): p. 103115.
2 Iwahara, H., Esaka, T., Uchida, H. and Maeda, N, Proton Conduction in Sintered Oxides and Its Application to Steam Electrolysis for Hydrogen-Production. Solid State Ionics 1981. 3-4: p. 159.
3 Song, S.J., Wachsman, E. D., Dorris, S. E. and Balachandran, U., Defect structure and ntype electrical properties of SrCe0.95Eu0.05O3-d. Journal of the Electrochemical Society, 2003. 150: p. A1484.10.1149/1.1614796
4 Chiang, Y.M. et al. , Defect and transport properties of nanocrystalline CeO2-x. Applied Physics Letters, 1996. 69(2): p. 185187.
5 Scherban, T. et al. , Raman-Scattering Study of BaCeO3 and SrCeO3. Solid State Communications, 1992. 84(3): p. 341344.
6 Mineshige, A. et al. , Oxygen chemical potential variation in ceria-based solid oxide fuel cells determined by Raman spectroscopy. Solid State Ionics, 2000. 135(1-4): p. 481485.
7 Loridant, S., Lucazeau, G., and Bihan, T. Le, A high-pressure Raman and X-ray diffraction study of the perovskite SrCeO3. Journal of Physics and Chemistry of Solids, 2002. 63(11): p. 19831992.

Keywords

Structure/Property Relations in Bulk Versus Solution Derived Proton Conducting Ceramics of the Form SrCe0.95Yb0.05O3 With Applications in Membrane Separations

  • Kyle Brinkman (a1), Elise B Fox (a2), Paul Korinko (a3), Robert Lascola (a4), Qiang Liu (a5) and Fanglin Chen (a6)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed