从煤炭化半焦炭中轻松制造联合合的多孔碳,以实现高效的微波吸收
Yan-Fang Li1,2, Li-Fang Wang1, Shu-Juan Gao1,2
1Department of Chemical and Materials Engineering, Lyuliang University, Lvliang 033001, China.
Molecules (Basel, Switzerland)
|October 16, 2024
概括
开发了一种新的Co-doped多孔碳材料,用于增强微波吸收 (MA). 这种材料有效地利用煤炭半焦炭,为废物回收利用和电磁屏蔽应用提供了一个有前途的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 开发高效的微波吸收器对于电磁干扰屏蔽和隐形技术至关重要.
- 多孔碳材料提供可调节的介电性质,而磁性纳米粒子提供磁性损失机制.
- 煤炭气化半焦炭 (SC) 是一个丰富的,低成本的碳来源,具有功能性材料开发的潜力.
研究的目的:
- 为了制造一个Co-doped多孔碳 (Co/C) 复合材料,以获得优越的微波吸收 (MA) 性能.
- 调查前体质量比对MA性能的影响.
- 探索介电和磁性损失的协同效应,以提高吸收.
主要方法:
- 易于用酸盐对煤炭水化气化半焦炭 (SC) 的碳化.
- 酸和SC前体之间的质量比率的系统变化.
- 描述微波吸收性能,包括反射损失和有效吸收带宽 (EAB).
主要成果:
- 一种Co-doped的多孔碳材料被成功合成.
- 最佳的MA性能是在酸与SC质量比为1:1的情况下实现的.
- 在4.0毫米厚度下,Co/C复合材料的最小反射损失为-33.45dB.
- 在2毫米厚度下获得3.5GHz的有效吸收带宽 (EAB).
- 增强的MA能力来自于协同介电损失,磁损失和多重散射.
结论:
- 这种简单的制造方法产生了一种Co/C复合材料,具有出色的微波吸收性能.
- 碳的介电损失和的磁性损失之间的协同相互作用是性能的关键.
- 本研究提出了一种可行的战略,用于先进材料应用中高价值的煤炭半焦炭的利用.
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