Highly enhanced microwave absorption for carbon nanotube/barium ferrite composite with ultra-low carbon nanotube loading
| Autor: | Kun Dai, Yue-Yi Wang, Wen-Jin Sun, Ding-Xiang Yan, Zhong-Ming Li, Song-Yang |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Materials science
Polymers and Plastics Mechanical Engineering Composite number Reflection loss Metals and Alloys Carbon nanotube law.invention chemistry.chemical_compound chemistry Mechanics of Materials law Materials Chemistry Ceramics and Composites Dielectric loss Thermal stability Composite material Absorption (electromagnetic radiation) Barium ferrite Microwave |
| Zdroj: | Journal of Materials Science & Technology. 102:115-122 |
| ISSN: | 1005-0302 |
| DOI: | 10.1016/j.jmst.2021.06.032 |
| Popis: | Barium ferrite (BaFe12O19) is considered as potential microwave absorption (MA) material thanks to the large saturation magnetization, high Curie temperature, and excellent chemical stability. The integration of carbon nanotube (CNT) can improve the dielectric loss of BaFe12O19 for further enhanced MA performance, nevertheless, the MA performance is still not desirable because of the poor CNT dispersion in the CNT/BaFe12O19 composites, which usually prepared via the ball-milling method, unless high CNT loading was used. Herein, according to the thermal stability of CNT in different atmosphere and the formation mechanism of BaFe12O19 from precursor, CNT was introduced in the precursor of BaFe12O19 uniformly during auto-ignition process and calcined under different atmosphere. When CNT loading is only 2.0 wt%, the CNT/BaFe12O19 composites obtained exhibits a minimum reflection loss ( R L min ) of -43.9 dB and effective bandwidth (with RL |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect