화학공학소재연구정보센터
Journal of Materials Science, Vol.30, No.8, 1939-1948, 1995
Preparation and Properties Evaluation of Zirconia-Based Al2O3 Composites Electrolytes for Solid Oxide Fuel-Cell Systems .2. Sintering Behavior and Microstructural Development
The compaction behaviour of ultrafine yttria-doped zirconia powders (6-8 nm) without and with alumina additions (0 to 20 wt %) has been studied. From the pore size distribution and using isothermal and nonisothermal techniques, the sintering behaviour of zirconia compacts in the temperature range 800-1500 degrees C was studied. It was found that alumina additions (up to 10 wt %) enhanced the zirconia compacts’ densification process and, above that alumina content, that process was retarded. Alumina additions did not affect the grain grown process in tetragonal zirconia samples. However, this was strongly hindered in the fully stabilized zirconia ones. The results were compared with those obtained in the same experimental conditions on a commercial zirconia powder.