| Full text | |
| Author(s): |
Oliveira, O. R.
;
Andrade, T. F.
;
Muccillo, E. N. S.
;
Berton, M. A. C.
;
Garcia, C. M.
;
Muccillo, R.
;
Singhal, SC
;
Yokokawa, H
Total Authors: 8
|
| Document type: | Journal article |
| Source: | SOLID OXIDE FUEL CELLS 11 (SOFC-XI); v. 25, n. 2, p. 5-pg., 2009-01-01. |
| Abstract | |
Yttrium-doped barium zirconate protonic conductors were synthesized by a two-step route consisting on diffusing barium ions into previously prepared yttrium-doped zirconia. The evolution of the structural phase content was followed by in situ high temperature X-ray diffraction in the room temperature-1200 degrees C and by X-ray diffraction analysis of a mixture of cubic yttria-stabilized zirconia and barium carbonate heat treated at high temperatures. The attainment of the BaZr0.85Y0.15O3-delta composition was evaluated by X-ray fluorescence measurements. Pellets sintered at 1500 degrees C had the electrical behavior under humidified argon studied by impedance spectroscopy in the 300-600 degrees C in the 40 Hz-110 MHz frequency range. Unitary planar solid oxide fuel cells La0.6Sr0.4Fe0.8Co0.2O3/BaZr0.85Y0.15O3-delta/Pt were assembled for measuring the output voltage under operation with hydrogen, methane and ethanol as fuels and air as the oxidant. (AU) | |
| FAPESP's process: | 05/53241-9 - Study of intergranular phenomena in ceramic materials |
| Grantee: | Reginaldo Muccillo |
| Support Opportunities: | Research Projects - Thematic Grants |