Yu Wang, Yue-dong Wu, Ke-han Wu, Shu-qiang Jiao, Kuo-chih Chou, and Guo-hua Zhang, Effect of NaCl on synthesis of ZrB2 by a borothermal reduction reaction of ZrO2, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 831-838. https://doi.org/10.1007/s12613-019-1794-9
Cite this article as:
Yu Wang, Yue-dong Wu, Ke-han Wu, Shu-qiang Jiao, Kuo-chih Chou, and Guo-hua Zhang, Effect of NaCl on synthesis of ZrB2 by a borothermal reduction reaction of ZrO2, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 831-838. https://doi.org/10.1007/s12613-019-1794-9
Research Article

Effect of NaCl on synthesis of ZrB2 by a borothermal reduction reaction of ZrO2

+ Author Affiliations
  • Corresponding author:

    Guo-hua Zhang    E-mail: ghzhang0914@ustb.edu.cn

  • Received: 1 September 2018Revised: 14 October 2018Accepted: 30 October 2018
  • ZrB2 powders were synthesized via a borothermal reduction reaction of ZrO2 with the assistance of NaCl under a flowing Ar atmosphere. The optimal temperature and reaction time were 1223 K and 3 h, respectively. Compared with the reactions conducted without the addition of NaCl, those performed with the addition of an appropriate amount of NaCl finished at substantially lower temperatures. However, the addition of too much NaCl suppressed this effect. With the assistance of NaCl, a special morphology of polyhedral ZrB2 particles covered with ZrB2 nanosheets was obtained. Moreover, the experimental results revealed that the special morphology was the result of the combined effects of B2O3 and NaCl. The formation of the special microstructure is explained on the basis of the "dissolution-recrystallization" mechanism.
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