Effect of NaCl on synthesis of ZrB<sub>2</sub> by a borothermal reduction reaction of ZrO<sub>2</sub>

Yu Wang; Yue-dong Wu; Ke-han Wu; Shu-qiang Jiao; Kuo-chih Chou; Guo-hua Zhang

doi:10.1007/s12613-019-1794-9

Volume 26 Issue 7

Jul. 2019

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文章导航 > 矿物冶金与材料学报（英文） > 2019 > 26(7): 831-838

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

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研究论文

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

State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

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

中文摘要

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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Research Article

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

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Abstract

Abstract

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.
- zirconium diboride;
- borothermal reduction;
- ultra-high temperature ceramics;
- dissolution-recrystallization mechanism

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

中文摘要

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

Abstract

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