Microwave absorbing property of gelcasting SiC-Si3N4 ceramics with hierarchical pore structures

Carbon foams were prepared by a polymer sponge replication process and their microwave absorbing properties were investigated. The electric conductivity of carbon foam has a direct effect on its microwave absorbing property, as the carbon foam with a medium electric conductivity of 0.46S/m has got a relatively excellent microwave absorbing property and demonstrated a characteristic of broadband absorption. Some structure modification has been made on carbon foams to fruther imrove their microwave absorbing performance. The result shows that making slots, especially gradient slots on the surface of carbon foams can greatly improve their microwave absorbing properties, while the reflection coefficients for a three-layered carbon foam structure exceeds -10dB with the combination effect of multilayer structure design and parameters gradient variatioin in the whole frequency range of 2.6-18GHz, which is usually to be considered as the practical application standard for microwave absorbing materials.

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Excellent Microwave Absorbing Property of Multiwalled Carbon Nanotubes with Skin–Core Heterostructure Formed by Outer Dominated Fluorination

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.7b10819 ◽

2018 ◽

Vol 122 (11) ◽

pp. 6357-6367 ◽

Cited By ~ 14

Author(s):

Yang Liu ◽

Yichun Zhang ◽

Xu Wang ◽

Zaoming Wang ◽

Wenchuan Lai ◽

...

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Multiwalled Carbon ◽

Microwave Absorbing Property ◽

Microwave Absorbing ◽

Absorbing Property

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Investigation on the critical factors of MoSe2-based microwave absorbing property

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-020-04737-1 ◽

2020 ◽

Author(s):

Ying Xia ◽

Wenfeng Zhu ◽

Qing Zhu ◽

Jiandong Wu ◽

Zhuguang Nie ◽

...

Keyword(s):

Critical Factors ◽

Microwave Absorbing Property ◽

Microwave Absorbing ◽

Absorbing Property

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The Preparation of FeCo/ZnO Composites and Enhancement of Microwave Absorbing Property by Two-Step Method

Materials ◽

10.3390/ma12193259 ◽

2019 ◽

Vol 12 (19) ◽

pp. 3259

Author(s):

Ka Gao ◽

Junliang Zhao ◽

Zhongyi Bai ◽

Wenzheng Song ◽

Rui Zhang

Keyword(s):

Single Phase ◽

Effective Bandwidth ◽

Frequency Range ◽

Step Method ◽

Absorption Properties ◽

Composite Surface ◽

Microwave Absorbing Properties ◽

Microwave Absorbing Property ◽

Microwave Absorbing ◽

Absorbing Property

In this paper, the flower-like FeCo/ZnO composites were successfully firstly prepared by a two-step method, and their microstructures and microwave absorbing properties were characterized. The results show that with an increase of temperature, the content of ZnO loaded on a FeCo/ZnO composite surface was increased. The optimal reflection loss (RL) value can be reached around −53.81 dB at 9.8 GHz, which is obviously superior to results of previous studies and reports, and its effective bandwidth (RL < −10 dB) is 3.8 GHz in the frequency range of 8.7–11.8 GHz with a matching thickness of 1.9 mm. We considered that a large number of lamellar and rod-like ZnO loaded on nano-FeCo single-phase solid solution by two-step method can significantly improve the electromagnetic wave absorption properties.

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