Graphene-enhanced microwave absorption properties of Fe3O4/SiO2 nanorods

Liu, Xiaofang; Chen, Yaxin; Hao, Chengcheng; Ye, Jinrui; Yu, Rong; Huang, Daqing

doi:10.1016/j.compositesa.2016.02.006

Cited by 90 publications

(28 citation statements)

References 31 publications

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“…Besides, the existing magnetic materials hardly have magnetic response to the high frequency band between 8.2 and 12.4 GHz [16,17]. In comparison, dielectric loss absorbents (e.g., carbon nanotube (CNT) [18], graphene [19], amorphous carbon [20], ZnO [21], BaTiO 3 [22], and TiO 2 [23], etc) have the advantages of low density, high thermal stability, and high dielectric constant value [24,25].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and investigation on ternary heterogeneous MWCNT@TiO2-C fillers and their silicone rubber wave-absorbing composites

Zhao

Zhang

Wang

et al. 2020

Composites Part A: Applied Science and Manufacturing

144

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Ternary heterogeneous MWCNT@TiO 2-C wave absorbent was firstly prepared, using glucose, MWCNT, and titanium isopropoxide as raw materials, through the solvothermal process followed by post-heat treatment. Afterwards, MWCNT@TiO 2-C/silicone rubber wave-absorbing composites were fabricated via solution casting and subsequent curing process. XRD, Raman, XPS, and TEM analyses demonstrated the MWCNT@TiO 2-C fillers were successfully synthesized with TiO 2 and amorphous carbon coated on the surface of MWCNT. When the MWCNT@TiO 2-C/silicone rubber wave-absorbing composites contained 25 wt% MWCNT@TiO 2-C fillers and with the thickness of 2.5 mm, it displayed the minimum reflection loss of-53.2 dB and an effective absorption bandwidth of 3.1 GHz. Remarkable wave-absorbing performances for MWCNT@TiO 2-C/silicone rubber composites could be attributed to the synergetic effect of interfacial polarization loss and conduction loss.

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Section: Introductionmentioning

confidence: 99%

Fabrication and investigation on ternary heterogeneous MWCNT@TiO2-C fillers and their silicone rubber wave-absorbing composites

Zhao

Zhang

Wang

et al. 2020

Composites Part A: Applied Science and Manufacturing

144

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“…In contrast, the f r of the Co/C composites appeared at gigahertz frequency, which was much higher than that of bulk Co metal. The considerable shift of f r to high frequency could be ascribed to the enhancement of anisotropy field H a ( f r µ H a ) due to the small size effect and confinement effect of the Co NPs embedded in porous carbon . In addition, we analyzed the plot of C 0 ( C 0 = µ ″( µ ′) −2 f −1 ) versus frequency (shown in Figure b) to study the effect of eddy current on magnetic loss.…”

Section: Resultsmentioning

confidence: 99%

An Efficient Co/C Microwave Absorber with Tunable Co Nanoparticles Derived from a ZnCo Bimetallic Zeolitic Imidazolate Framework

Huang

Liu

2018

Part & Part Syst Charact

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A facile strategy is developed to modulate the content, particle size, and dispersity of magnetic metal nanoparticles (NPs) in porous carbon composite derived from Co/Zn bimetallic zeolitic imidazolate framework (ZIF). By adjusting the Co/Zn mole ratio in ZIF structure, porous carbon embedded with controllable Co NPs is synthesized through pyrolysis of CoZn‐based ZIF during which Zn is selectively evaporated away at 900 °C. The Co/C composite derived from ZIF with Co/Zn ratio of 1/1 (Co50/C composite) displays well‐dispersed Co NPs uniformly embedded in porous carbon. Meanwhile, the impedance matching of the composite is significantly improved due to the appropriate amount of Co NPs. Benefiting from the synergistic effect between Co NPs with magnetic loss and carbon with dielectric loss, the Co50/C composite exhibits excellent microwave absorbing properties with strong absorption, thin thickness, and lightweight, which is superior to previous metal–organic framework‐derived absorbers. When the filler loading of Co50/C composite in paraffin matrix is only 20 wt%, a minimum reflection loss of −51.6 dB is achieved at a very thin layer thickness of 1.6 mm.

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“…Hence, there was some exchange resonance loss. To study the loss of magnetic absorption materials, the following formula is generally used [19] ′′ (μ ′ ) −2 −1 = 2 3 μ 0 2…”

Section: Effect Of Ball-milling Time On the Absorption Mechanismmentioning

confidence: 99%

Effect of Ball Milling on the Absorption Properties of Fe3O4

Liang¹,

Yuan²,

Huang³

et al. 2020

Materials

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FeCl3∙6H2O was used as raw material to produce Fe3O4, using the solvothermal method with ethylene glycol as the solvent. Fe3O4, with different particle sizes, was obtained via mechanical ball-milling by controlling the milling time. Effect of the milling time on the structure, morphology, and electromagnetic parameters of Fe3O4 were studied, and the absorption properties and mechanism of Fe3O4, for different milling times were analyzed. The results showed that the integrity of the original small spherical structure decreased as the ball milling time increased. Fe3O4 showed excellent microwave absorptions as the milling time reached 2 h, the reflection loss reached the maximum of −21.19 dB at 4.64 GHz as the thickness was 6.55 mm.

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Graphene-enhanced microwave absorption properties of Fe3O4/SiO2 nanorods

Cited by 90 publications

References 31 publications

Fabrication and investigation on ternary heterogeneous MWCNT@TiO2-C fillers and their silicone rubber wave-absorbing composites

Fabrication and investigation on ternary heterogeneous MWCNT@TiO2-C fillers and their silicone rubber wave-absorbing composites

An Efficient Co/C Microwave Absorber with Tunable Co Nanoparticles Derived from a ZnCo Bimetallic Zeolitic Imidazolate Framework

Effect of Ball Milling on the Absorption Properties of Fe3O4

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