Omar, Shobit2; bin Najib, Waqas3; Chen, Weiwu4; Tripathy, S. K.3
1 Department of Energy Conversion and Storage, Technical University of Denmark2 Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3 Technical University of Denmark4 Risø National Laboratory for Sustainable Energy, Technical University of Denmark
The oxide ionic conductivity of Sc0.18Zr0.82O1.91 doped with 0.5 mol.% of both Yb2O3 and In2O3 is evaluated at various temperatures in air. Among various co-doped compositions, In0.02Sc0.18Zr0.80O1.90 exhibits the highest grain ionic conductivity followed by Yb0.02Sc0.18Zr0.80O1.90 at 500°C. However, it also possesses phase transformation from c- to β-phase at 475°C on cooling. In the present work, an attempt is made to completely stabilize the cphase in In0.02Sc0.18Zr0.80O1.90 by substituting 0.5 mol.% of In2O3 with Yb2O3, which can enhance the ionic conductivity in co-doped compositions.
A I P Conference Proceedings Series, 2012, Vol 1461, p. 289-293
Main Research Area:
International Workshop on Functional Materials (IWFM-2011), 2012