Preparation of hafnium diboride nanopowders in an anhydrous Na2B4O7 ionic melt

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• 作者：S. E. Kravchenko ; A. G. Burlakova ; I. I. Korobov ; Yu. M. Shul’ga…
• 刊名：Inorganic Materials
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：51
• 期：4
• 页码：380-383
• 全文大小：392 KB
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  Kiselev, AV, Dreving, VP eds. (1973) Eksperimental’nye metody v adsorbtsii i molekulyarnoi khro
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Inorganic Chemistry
  Industrial Chemistry and Chemical Engineering
  Materials Science
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3172

文摘

Reactions between hafnium powder and microcrystalline boron in a Na2B4O7 ionic melt have been studied at temperatures from 600 to 850°C. The results demonstrate that nanoparticulate hafnium diboride forms starting at 750°C. According to electron microscopy data, the HfB2 powder obtained at 850°C consists of nearly spherical particles 50-5 nm in diameter, which agrees with the equivalent particle diameter (?60 nm) evaluated from the specific surface area of the HfB2 and with the crystallite size (?5 nm) determined from X-ray diffraction data.