Ultra-broadband microwave absorption of honeycomb-like three-dimensional carbon foams embedded with zero-dimensional magnetic quantum dots

微波食品加热 材料科学 量子点 碳纳米泡沫 阻抗匹配 石墨烯 导电体 光电子学 电阻抗 纳米技术 复合材料 物理 量子力学 多孔性 电气工程 工程类
作者
Bo Wei,Xiangfei Wei,Mengqing Wang,Zhengjun Yao,Zhiping Chen,Ping Chen,Xiaoxuan He,Jintang Zhou
出处
期刊:Journal of Alloys and Compounds [Elsevier BV]
卷期号:939: 168781-168781 被引量:15
标识
DOI:10.1016/j.jallcom.2023.168781
摘要

The magnetic response behavior of microwave absorbing materials (MAMs) is beneficial to the expansion of the effective bandwidth in the high-frequency electromagnetic fields. However, the high density of magnetic components does not match with the lightweight requirement of MAMs. In response to this contradiction, the metal-organic framework (MOF) ZIF-67 material and melamine foam were used in the present work as the magnetic component and self-sacrificial template, respectively. A three-dimensional honeycomb carbon foam with zero-dimensional magnetic Co quantum dots (Co-QDs/CF) was prepared by a simple two-step method. The unique honeycomb structure significantly improved impedance matching and carrier mobility, providing more scattering paths for the electromagnetic wave conduction while reducing the overall density. In turn, the uniformly embedded magnetic Co-QDs endowed the 3D carbon foam with excellent high-frequency magnetic response while ensuring light weight. The ultra-small size (<10 nm) enhanced the exchange coupling between magnetic particles while suppressing the eddy current effect, and the magnetic loss capability was greatly improved. Interestingly, Co-QDs acting as numerous micro-resistors formed a large three-dimensional conductive network with the carbon skeleton, which demonstrated outstanding electron transport ability, so that the conductance loss was significantly enhanced. Surprisingly, the effective absorption bandwidth of Co-QDs/CF in the 2–18 GHz band was as high as 8.74 GHz with a matching thickness of 2.5 mm, while the corresponding filling rate was only 20 wt%. Thus, the proposed ingenious strategy to construct three-dimensional conductive networks using ultra-small magnetic quantum dots opens up new prospects for the development of lightweight broadband MAMs.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
肖雪依完成签到,获得积分10
1秒前
2秒前
2秒前
研友_nv2krn完成签到,获得积分10
2秒前
3秒前
ererrrr发布了新的文献求助10
3秒前
ding应助愉快盼曼采纳,获得10
3秒前
菜系发布了新的文献求助10
3秒前
桐桐应助zzYu采纳,获得10
3秒前
阿伟别摆烂了完成签到 ,获得积分10
4秒前
怕黑的电灯胆给怕黑的电灯胆的求助进行了留言
5秒前
俞晓发布了新的文献求助10
5秒前
从容的路灯完成签到,获得积分10
5秒前
apeng发布了新的文献求助10
5秒前
忧伤的二锅头完成签到 ,获得积分10
6秒前
CC完成签到,获得积分10
6秒前
提莫蘑菇完成签到,获得积分10
6秒前
SYLH应助附院007采纳,获得10
6秒前
雾霭迷茫完成签到,获得积分10
6秒前
7秒前
7秒前
刘清河完成签到 ,获得积分10
7秒前
Derik完成签到,获得积分10
8秒前
he发布了新的文献求助10
8秒前
8秒前
羊知鱼完成签到,获得积分10
9秒前
Akim应助球球实验出成果采纳,获得10
9秒前
9秒前
熙熙沅沅完成签到 ,获得积分10
9秒前
WLLLR完成签到 ,获得积分10
10秒前
打打应助ererrrr采纳,获得10
10秒前
10秒前
你喜欢鼻涕虫吗完成签到,获得积分10
11秒前
研友_VZG7GZ应助ember采纳,获得10
11秒前
12秒前
13秒前
SYLH应助清秀的怀蕊采纳,获得10
13秒前
cara33完成签到,获得积分10
13秒前
sunyuhao发布了新的文献求助10
14秒前
大个应助二异丙基氨基锂采纳,获得10
14秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3969513
求助须知:如何正确求助?哪些是违规求助? 3514327
关于积分的说明 11173617
捐赠科研通 3249672
什么是DOI,文献DOI怎么找? 1794973
邀请新用户注册赠送积分活动 875537
科研通“疑难数据库(出版商)”最低求助积分说明 804836