Abstract
Nano-Zirconium diboride (ZrB2) powder was vital raw material for manufacturing ultra-high temperature ceramics (UHTCs) and C/C composite materials, which were widely used in extreme environment. In this paper, a convenient way of synthesizing nano-ZrB2 powder was proposed. Firstly, the precursor consisting of ultrafine-ZrC and C was obtained via vacuum carbothermal reduction of nano-ZrO2. And then, the carbothermal reduction product was boronized by B4C in Ca melt. In boronation process, Ca melt would play a key role as decarburizer. By boronation reaction at 1373 K and 1473 K, cauliflower-shaped ZrB2 particle and smooth polyhedral ZrB2 particle were obtained, respectively. XRD and BET analyses showed that the grain sizes and BET-equivalent particle diameters of these two products were less than 100 nm.
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This work was financially supported by the State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, China.
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Wang, Y., Li, Y., Yang, XH. et al. Preparation of nano-ZrB2 powder by Ca liquid assisted boronation reaction between ZrC and B4C. J Nanopart Res 24, 251 (2022). https://doi.org/10.1007/s11051-022-05633-x
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DOI: https://doi.org/10.1007/s11051-022-05633-x