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New Route to Synthesize Ultra-Fine Zirconium Diboride Powders Using Inorganic–Organic Hybrid Precursors

Authors

  • Yongjie Yan,

    1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
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    • Graduate School of the Chinese Academy of Sciences, Beijing, China.

  • Zhengren Huang,

    Corresponding author
    1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
      †Author to whom correspondence should be addressed. e-mail: zhrhuang@mail.sic.ac.cn
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  • Shaoming Dong,

    1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
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  • Dongliang Jiang

    1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
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  • D. Butt—contributing editor

  • This work was financially supported by the National Natural Science Foundation of China.

†Author to whom correspondence should be addressed. e-mail: zhrhuang@mail.sic.ac.cn

Abstract

Ultra-fine zirconium diboride (ZrB2) powders have been synthesized using inorganic–organic hybrid precursors of zirconium oxychloride (ZrOCl2·8H2O), boric acid, and phenolic resin as sources of zirconia, boron oxide, and carbon, respectively. The reactions were substantially completed at a relatively low temperature (∼1500°C). The synthesized powders had a smaller average crystallite size (<200 nm), a larger specific surface area (∼32 m2/g), and a lower oxygen content (<1.0 wt%), which were superior to some commercially available ZrB2 powders. The thermodynamic change in the ZrO2–B2O3–C system was mainly studied by thermogravimetric and differential thermal analysis. The crystallite size and morphology of the synthesized powders were characterized by transmission electron microscopy and scanning electron microscopy.

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