Articles
  • Effect of air flow rate on preparation of boron carbide by sol-gel low-temperature pyrolysis system

  • Chengcheng Tiana,b,c, Yang Lie, Yuanxia Wanga,b,*, Ying Shia,d, and Li-Zhi Liua,b,c

  • aPolymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, 110142, People’s Republic of China
    bSchool of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, People’s Republic of China
    cSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, People’s Republic of China
    dResearch and Development, Dongguan HAILI Chemical Material CO., LTD, Dongguan, 523808, People’s Republic of China
    eAlcohol Fuel Cell Research Group, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, 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

The morphology and particle size of boron carbide in the sol-gel low-temperature pyrolysis system were controlled by changing the air flow rate during the pyrolysis of boric acid glycerin system. Analyzed the infrared absorption properties of condensation products and pyrolysis products, as well as the carbon network structure of pyrolysis products and the microstructure, phase composition, and particle size of boron carbide powder. The research results indicate that the air flowing in the pyrolysis atmosphere can accelerate the thermal decomposition efficiency of boric acid glycerol condensate and effectively reduce the pyrolysis temperature. The faster the air flow rate during the pyrolysis process, the denser the carbon network structure, smaller pore size, and more pores in the pyrolysis products, and the better the dispersion of boron oxide. In the boric acid glycerol system, with the increase of pyrolysis gas flow rate, the average particle size of boron carbide decreases from 10 μm to about 2 μm. In addition, the morphology of boron carbide changes from a hexagonal diamond to a smoother morphology. This indicates that by changing the air flow rate during the pyrolysis process, the carbon network structure of the pyrolysis products can be improved, thereby controlling the morphology and particle size of boron carbide. This paper provides a new method for the study of the sol-gel low-temperature pyrolysis method to accurately control the morphology of boron carbide.


Keywords: Boron carbide, Sol-gel Low-temperature pyrolysis, Pyrolysis air flow rate, Carbon mesh structure, Glycerol.

This Article

  • 2024; 25(2): 228-233

    Published on Apr 30, 2024

  • 10.36410/jcpr.2024.25.2.228
  • Received on Jan 6, 2024
  • Revised on Mar 27, 2024
  • Accepted on Mar 28, 2024

Correspondence to

  • Yuanxia Wang

  • aPolymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, 110142, People’s Republic of China
    bSchool of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, People’s Republic of China
    Tel : 13504946630

  • E-mail: wangyuanxia@aliyun.com