Scholarlink

<p>The 3C-SiC/graphene composite powder was successfully synthesized through a simple carbothermal reduction method using expanded graphite and silicon powder. The effects of catalyst content, temperature, and C/Si molar ratio on the synthesized products were systematically investigated. Results demonstrated that the complete formation temperature of 3C-SiC decreased to 1350&#xa0;°C with the addition of 3wt% Fe catalyst. Preparation efficiency is enhanced, and energy consumption is reduced. Simultaneously, the Fe catalyst promoted the growth of Silicon Carbide Nanowires(SiCNWs) and enhanced electromagnetic wave absorption intensity. When the expanded graphite was appropriately excessive (C/Si molar ratio of 1.1:1), graphene was in situ formed in the products at 1350&#xa0;°C. This composite powder exhibits the minimum reflection loss (RL<sub>min</sub>) of −&#xa0;27.24 dB in the high-frequency range of 14–18 GHz. The synergistic effect between graphene and 3C-SiC could enhance dielectric loss, optimize impedance matching, and broaden absorption bandwidth. The 3C-SiC/graphene composite powder shows promising potential as an excellent electromagnetic wave absorbing material.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Efficient preparation of high-frequency wave-absorbing SiC/graphene composite powder

  • 期刊论文

  • 发表日期：

    2026年1月21日

查看全文
  • Yutong Liu,
  • Shiming Hao,
  • Haozhan Wu,
  • Sitong Cai,
  • Jingpei Xie

摘要

The 3C-SiC/graphene composite powder was successfully synthesized through a simple carbothermal reduction method using expanded graphite and silicon powder. The effects of catalyst content, temperature, and C/Si molar ratio on the synthesized products were systematically investigated. Results demonstrated that the complete formation temperature of 3C-SiC decreased to 1350 °C with the addition of 3wt% Fe catalyst. Preparation efficiency is enhanced, and energy consumption is reduced. Simultaneously, the Fe catalyst promoted the growth of Silicon Carbide Nanowires(SiCNWs) and enhanced electromagnetic wave absorption intensity. When the expanded graphite was appropriately excessive (C/Si molar ratio of 1.1:1), graphene was in situ formed in the products at 1350 °C. This composite powder exhibits the minimum reflection loss (RLmin) of − 27.24 dB in the high-frequency range of 14–18 GHz. The synergistic effect between graphene and 3C-SiC could enhance dielectric loss, optimize impedance matching, and broaden absorption bandwidth. The 3C-SiC/graphene composite powder shows promising potential as an excellent electromagnetic wave absorbing material.