The phase transition and growth of yttria-stabilized zirconia (YSZ) nanocrystallites prepared by a sol-gel process with various amounts of ZrOCl 2 ·8H 2 O and Y(NO 3 ) 3 ·6H 2 O in ethanol-water solutions at low temperatures were studied. DTA/TGA, XRD, and TEM were used to characterize the YSZ nanocrystallites. The crystallization temperature of 3YSZ, in which Y 2 O 3 /(Y 2 O 3 +ZrO 2 ) = 0.03 gel powders, estimated by DTA/TG is about 427°C. When 3YSZ and 5YSZ gels were calcined at 500°C, their crystal structures were composed of coexisting tetragonal and monoclinic ZrO 2 . Cubic ZrO 2 was obtained when added Y 2 O 3 was greater than 8 mol%. A nanocrystallite size distribution between 10 and 20 nm was obtained from TEM observations.
|Number of pages||6|
|Publication status||Published - 2005 Dec 1|
|Event||9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada|
Duration: 2005 May 15 → 2005 May 20
|Other||9th International Symposium on Solid Oxide Fuel Cells, SOFC IX|
|Period||05-05-15 → 05-05-20|
All Science Journal Classification (ASJC) codes