Synthesis of Monodispersed Fine Hafnium Diboride Powders Using Carbo/Borothermal Reduction of Hafnium Dioxide
2008; Wiley; Volume: 91; Issue: 8 Linguagem: Inglês
10.1111/j.1551-2916.2008.02466.x
ISSN1551-2916
AutoresDewei Ni, Guojun Zhang, Yanmei Kan, Pei‐Ling Wang,
Tópico(s)Semiconductor materials and devices
ResumoFine hafnium diboride (HfB 2 ) powders have been prepared by modified carbothermal/borothermal reduction of hafnium dioxide (HfO 2 ) at relatively low temperatures (1500°–1600°C) for 1–2 h. The XRD patterns could be indexed as hexagonal HfB 2 and no evidence of HfC, HfO 2 , or other impurities was observed. Glow discharge mass spectrometer analysis indicates that the synthesized HfB 2 powders had high purity. The synthesized HfB 2 powders had small average crystallite size (around 1 μm) and low oxygen content (<0.30 wt%). Scanning electron microscopy observation of the as‐prepared powders demonstrated quasi‐column morphology and laser particle size analysis showed monodispersity (polydispersity 0.005).
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