稀土添加剂对超细ZrO2织构、结构的影响

Pure zirconia and zirconia containing Y or Ce were prepared by SupercriticalDrying Method (SCD) followed by calcination in air at temperatu-re up to 700℃. It wasfound that the zirconia containing Y or Ce possessed much higher specific surface area andlarger pore volume than that of pure zirconia. The BET surface area of 3.4Y2O3-96.6ZrO2without calcination and that calcined at 700℃ were 376.2 m2.g-1 and 80.0 m2 .g-1 respec-tively, while the corresponding values of pure zirconia were 248.0 m2 .g-1 and 47.8 m2 .g-1respectively. {It was postulated that the better ewroperties of zirconia containingY or Ce were resulted from preventing zirconia particles sintering in the presence of Y orCe additive. All of these Samples made by SCD had a well-developed mesoporous texture.