CATALOGO DEI PRODOTTI DELLA RICERCA
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EnglishA powder of nominal composition (ZrO2)(0.886)(Sc2O3)(0.104)(Al2O3)(0.01) was synthesized by spray drying with the purpose of testing the performance of solid oxide fuel cells containing scandia-stabilized zirconia (ScSZ) as electrolyte. The phases resulting from calcination and sintering at different temperatures were investigated by XRD, impedance and Raman spectroscopy. At sintering temperatures of 1200-1400 degrees C nearly equal amounts of cubic and rhombohedral ScSZ were detected, whereas heat treatment higher than 1500 degrees C led to a cubic single-phase material. A preliminary reaction mechanism of phase formation is proposed with respect to the various results depending on heat treatment.
| Titolo: | Structural evolution of Sc-containing zirconia electrolytes |
| Autori: | |
| Data di pubblicazione: | 1997 |
| Rivista: | |
| Abstract: | A powder of nominal composition (ZrO2)(0.886)(Sc2O3)(0.104)(Al2O3)(0.01) was synthesized by spray drying with the purpose of testing the performance of solid oxide fuel cells containing scandia-stabilized zirconia (ScSZ) as electrolyte. The phases resulting from calcination and sintering at different temperatures were investigated by XRD, impedance and Raman spectroscopy. At sintering temperatures of 1200-1400 degrees C nearly equal amounts of cubic and rhombohedral ScSZ were detected, whereas heat treatment higher than 1500 degrees C led to a cubic single-phase material. A preliminary reaction mechanism of phase formation is proposed with respect to the various results depending on heat treatment. |
| Handle: | http://hdl.handle.net/11562/391659 |
| Appare nelle tipologie: | 01.01 Articolo in Rivista |
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