Nano-Hafnium Diboride Powders Synthesized Using a Spark Plasma Sintering Apparatus

Nano‐hafnium diboride powder was synthesized by boro/carborthermal reduction process of HfO2 using a spark plasma sintering (SPS) apparatus. The agglomerated product was found to be 1–2 μm in size, which was composed with small primary particles of 100–200 nm in size. The particle size of HfO2 playe...

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Bibliographic Details
Published inJournal of the American Ceramic Society Vol. 95; no. 5; pp. 1493 - 1496
Main Authors Wang, Hailong, Lee, Sea-Hoon, Kim, Hai-Doo
Format Journal Article
LanguageEnglish
Published Columbus Blackwell Publishing Ltd 01.05.2012
Wiley Subscription Services, Inc
Subjects
Ceramics
Hafnium oxide
Heating
Nanocomposites
Nanomaterials
Nanostructure
Oxygen
Oxygen content
Plasma sintering
Reduction
Spark plasma sintering
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Summary:Nano‐hafnium diboride powder was synthesized by boro/carborthermal reduction process of HfO2 using a spark plasma sintering (SPS) apparatus. The agglomerated product was found to be 1–2 μm in size, which was composed with small primary particles of 100–200 nm in size. The particle size of HfO2 played an important role to produce the nano‐boride powder. In addition, the grain growth of HfB2 could be effectively suppressed by using SPS due to the fast heating rate. The synthesized powder had a low oxygen content (~0.66 wt%). Excessive B4C and C were necessary during the boro/carborthermal reduction in HfO2 process because of the volatilization of boron as a form of B2O3 and the reduction in residual HfO2.
Bibliography:ark:/67375/WNG-L7RKKNZ7-F
ArticleID:JACE5141
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ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2012.05141.x