Synthesis and sintering of ZrO sub 2 -CeO sub 2 powder by use of polymeric precursor based on Pechini process

Nanocrystalline ZRO sub(2)-12 mol % CeO sub(2) powders were synthesized using a polymeric precursor method based on the Pechini process. X-ray diffraction (XRD) patterns showed that the method was effective to synthesize tetragonal zirconia single-phase. The mean crystallite size attained ranges from 6 to 15 nm. The BET surface areas were relatively high reaching 97 m super(2)/g. Studies by nitrogen adsorption /desorption on powders, dilatometry of the compacts, and transmission electron microscopy (TEM) of the powders, were also developed to verify the particles agglomeration state. Both citric acid: ethylene glycol ratio and calcination temperature affected the powder morphology, which influenced the sinterability and microstructure of the sintered material, as showed by scanning electron microscopy (SEM). copyright 2001 Kluwer Academic Publishers.