Abstract
This work focuses on the synthesis of tetragonal zirconia (ZrO2) nanocrystallites with diameters of 5 nm by a simple hydrothermal process in the presence of hydrazine hydrate. Structural characterization of the ZrO2 products using X‐ray diffraction and Raman spectroscopy revealed that the predominant crystal phase was the tetragonal phase. High‐resolution transmission electron microscopy images further showed that that the diameter of the majority of the tetragonal ZrO2 nanocrystallites was <5 nm. Furthermore, we discussed the mechanism of the hydrothermal process and the critical roles of hydrazine hydrate in the hydrothermal formation of the small‐sized ZrO2 nanocrystallites.
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