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

论文摘要

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.

论文目录

• 1. Introduction
• 2. Experimental
• 3. Results and discussion
•   3.1. Effects of heating time, temperature and NaCl con-tent on the phase compositions of the products
•   3.2. Effect of NaCl on the morphology of the products
•   3.3. Formation mechanism of nanosheets
• 4. Conclusions

文章来源

类型: 期刊论文

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

来源: International Journal of Minerals Metallurgy and Materials 2019年07期

年度: 2019

分类: 工程科技Ⅱ辑,工程科技Ⅰ辑

专业: 材料科学,金属学及金属工艺

单位: State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing

基金: financially supported by the Fundamental Research Funds for the Central Universities,China (No. FRF-GF-17-B41)

分类号: TG146.414;TB383.1

页码: 831-838

总页数: 8

文件大小: 7744K

下载量: 9