The factors governing the existence of metastable cubic and tetragonal phases in zirconia powders are still controversial. In order to elucidate this question, the effects of calcination temperature on ultrafine powders prepared from different precursors by different low-temperature chemical routes were studied. The morphological and structural characteristics of the powders depending on the calcination temperature were determined by means of conventional and high-resolution transmission electron microscopy (CTEM and HREM) and X-ray diffraction methods (whole and peak profile fitting procedures). Important structural differences between the powders depending on the precursor were revealed by HREM. The presence of impurities and/or microstrains seems to play a major role in the stabilization of the cubic and the tetragonal phases.
Transmission Electron Microscopy Zirconia Calcination Phase Transformation Calcination Temperature
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.