Articles
  • Synthesis of boron carbide powder through gas-solid reaction method using nanoporous carbon as carbon source

  • Haozhan Lia, Hongkang Weia,*, Huijuan Qiua, Yukang Wanga, Chang-an Wangb and Zhipeng Xieb

  • aAdvanced Ceramic Materials Research Institute, School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen, Jiangxi 333401, People’s Republic of China
    bState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People’s Republic of 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

Sub-micron boron carbide powders were synthesized through a gas-solid reaction process using ZIF-8-derived nanoporous carbon and boron oxide as raw materials. The effects of calcination temperature and atmosphere, amount of boron oxide, and gas-solid reaction apparatus on phase composition and morphology of the synthesized boron carbide powders were studied. The results show that, even with sufficient boron oxide addition, it is not feasible to obtain boron carbide powder of high purity in argon environment. Although vacuum environment can significantly improve the purity of the synthesized boron carbide powder, there are a large number of large particles of step morphology in the synthesized boron carbide powder. The improved gas-solid reaction apparatus can effectively impede the formation of boron carbide particles of step morphology. Nearly spherical submicron boron carbide particles with a median particle size of 480 nm and good particle size consistency could be synthesized at 1600 °C with 0.3 g nanoporous carbon and 10 g B2O3 under vacuum by using the improved apparatus


Keywords: Boron carbide, Gas-solid reaction method, Carbothermal reaction, Nanoporous carbon, Particle size distribution

This Article

  • 2023; 24(1): 1-7

    Published on Feb 28, 2023

  • 10.36410/jcpr.2023.24.1.1
  • Received on Apr 22, 2022
  • Revised on Jun 4, 2022
  • Accepted on Jun 4, 2022

Correspondence to

  • Hongkang Wei

  • Advanced Ceramic Materials Research Institute, School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen, Jiangxi 333401, People’s Republic of China
    Tel/Fax: +86-0798-8499678

  • E-mail: hongkangwei@vip.qq.com