Lightweight three-dimensional Fe3O4/carbon micro-flowers with tunable microwave absorption properties

Lightweight three-dimensional Fe3O4/carbon micro-flowers with tunable microwave absorption properties

Fe3O4/C micro-flowers with a three-dimensional (3D) porous morphology (3D-Fe3O4/C MFs, ∼5–7 μm) were prepared by a simple hydrothermal method, with a subsequent calcination step. The 3D-Fe3O4/C MFs consisted of radially assembled 2D Fe3O4/C nanoflakes (NFs, thickness ∼40 nm). When the electromagneti...

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Veröffentlicht in:Journal of alloys and compounds 2019-08, Vol.798, p.414-423
Hauptverfasser: Li, Cuiping, Ge, Yaqing, Jiang, Xiaohui, Sui, Jing, Zhang, Zhiming, Yu, Liangmin
Format: Artikel
Sprache:eng
Schlagworte:
Carbon
Electromagnetic radiation
Flowers
Hierarchically porous structure
Iron oxides
Lightweight
Microwave absorption
Morphology
Paraffins
Synergistic effect
Thickness
Three dimensional flow
Three-dimensional
Tunable EMWA performances
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Zusammenfassung:Fe3O4/C micro-flowers with a three-dimensional (3D) porous morphology (3D-Fe3O4/C MFs, ∼5–7 μm) were prepared by a simple hydrothermal method, with a subsequent calcination step. The 3D-Fe3O4/C MFs consisted of radially assembled 2D Fe3O4/C nanoflakes (NFs, thickness ∼40 nm). When the electromagnetic wave absorption (EMWA) performances of paraffin composites with 10, 30, and 40 wt% 3D-Fe3O4/C MF loading and Fe3O4-based materials were compared, the paraffin composite with 20 wt% loading exhibited a strong reflection loss (RL, −37.6 dB) and a broad effective absorption bandwidth (EAB, RL 
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.05.250