Solid-State Synthesis and Characterization of Hafnium Diboride Nanoparticles

Hafnium diboride (HfB 2 ) nanoparticles have been prepared by a solid-state reaction of hafnium dioxide (HfO 2 ), metallic magnesium (Mg) and sodium borohydride (NaBH 4 ) at 700°C in an autoclave. The structure and morphology of the obtained product are investigated by X-ray powder diffraction (XRD)...

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Bibliographic Details
Published in:Journal of superhard materials 2020-11, Vol.42 (6), p.396-400
Main Authors: Liangbiao Wang, Cheng, Qinglin, Zhao, Dejian, Liu, Weiqiao, Yang, Tinghai, Lu, Juanjuan, Zhang, Kailong, Gong, Huaxu, Qin, Hengfei
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Hafnium compounds
Hafnium oxide
Image transmission
Magnesium
Morphology
Nanoparticles
Oxidation
Oxidation resistance
Physical Chemistry
Production
Properties
Solid state
Stability analysis
Structure
Thermal resistance
Thermal stability
Thermogravimetric analysis
Transmission electron microscopy
X ray powder diffraction
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Description
Summary:Hafnium diboride (HfB 2 ) nanoparticles have been prepared by a solid-state reaction of hafnium dioxide (HfO 2 ), metallic magnesium (Mg) and sodium borohydride (NaBH 4 ) at 700°C in an autoclave. The structure and morphology of the obtained product are investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The transmission electron microscopy (TEM) image shows that the average size of HfB 2 nanoparticles is about 30 nm. The oxidation behavior of HfB 2 is studied by thermogravimetric analysis (TGA). It has good thermal stability and oxidation resistance below 380°C in air. Furthermore, the possible formation mechanism of HfB 2 is also discussed.
ISSN:1063-4576
1934-9408
DOI:10.3103/S106345762006012X