Articles
  • Quasi-nanocrystalline ZrB2 powder synthesized by salt-assisted combustion and its formation mechanism

  • Faqi Zhana,*, Ru Baia, Xiao Liua, Ke Xua, Hua Zhanga, Min Zhua, Yuehong Zhenga, Shipeng Xub, Jie Shenga and Peiqing Laa,*

  • aState Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
    bGansu Key Laboratory of Solar Power System Engineering, Jiuquan Vocational and Technical College, Jiuquan 735000, China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanoscale ceramic powders are very important for sintering densification and deviceization. A new salt-assisted combustion synthesis process was used to prepare pure quasi-nanocrystalline zirconium diboride (ZrB2) powder on a large scale. The ZrO2-B2O3-Mg system with single NaCl salt and NaCl-KCl mixed salts as diluents was adopted to prepare ZrB2 powders. The results show that high-purity ZrB2 quasi-nanocrystalline powder with average size of ~105 nm and purity of 99.24% was obtained by adding molten salts diluent. The impurity mainly existed in the form of Mg0.2Zr0.8O1.8 phase and Mg3B2O6 phase. The effects of diluent content and type on the adiabatic temperature, powder purity, particle size and microstructure of the system were studied. This work will provide theoretical basis and technical support for large-scale preparation of boride nano-ceramic powders.


Keywords: Salt-assisted combustion, ZrB2 nanopowders, Molten salt diluent, Formation mechanism.

This Article

  • 2024; 25(4): 490-498

    Published on Aug 31, 2024

  • 10.36410/jcpr.2024.25.4.490
  • Received on Oct 8, 2023
  • Revised on Dec 14, 2023
  • Accepted on Jan 3, 2024

Correspondence to

  • Faqi Zhan, and Peiqing La

  • State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
    Tel : +86 15209310025 Fax: +86 15209310025

  • E-mail: zhanfaqi@lut.edu.cn (Faqi Zhan), pqla@lut.edu.cn (