Preparation and Property Characteristics of Non-agglomerated HfO2 Nano Powders by Wet Chemical Method

Abstract

Abstract: HfO₂ nano powders were prepared by the chemical precipitant method. The influence of different preparation
parameters on the agglomeration was investigated by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy
(TEM), BET surface area techniques and laser particle analyzer. Non-agglomerated orthorhombic, HfO₂ powders with a size of about 25nm
can be obtained by controlling starting concentration and pH values of solution, adding surfactants, washing gels with alcohol and calcining
at 700℃. Orthorhombic HfO₂ ceramics of 96% theoretical density can be prepared by sintering at 1800℃ for 2h in hydrogen. The results
show that there are both o-HfO₂ and m-HfO₂in the sample, mainly o-HfO₂.

Key words: chemical precipitant method, non-agglomerate, HfO₂ nano powder, sinter

CLC Number:

TB383
TF12

WU Zhi-Hua,JIANG Dan-Yu,LIU Jian-Min,JI Ya-Ming,SHI Wei-Min,ZHANG Cheng. Preparation and Property Characteristics of Non-agglomerated HfO₂ Nano Powders by Wet Chemical Method[J]. Journal of Inorganic Materials.

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Preparation and Property Characteristics of Non-agglomerated HfO₂ Nano Powders by Wet Chemical Method

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