Synthesis and enhancement of microwave absorption property by coating silicon dioxide and polyaniline for Fe-Co alloy

Li, Suping; Huang, Ying; Ding, Lei; Zong, Meng; Zhang, Na; Qin, Xiulan; Liu, Panbo

doi:10.1016/j.jmmm.2019.165259

Cited by 18 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding the magnetic loss materials, magnetic loss is derived from the natural resonance and eddy current effect in the microwave band. [59,60] It is well known that the C 0 function is usually used to evaluate the eddy current related magnetic loss and it is expressed as Equation (5). The equation gives a clear explanation that the eddy current effect has influence on the magnetic loss, and the C 0 value will be a constant with the increase of frequency.…”

Section: Resultsmentioning

confidence: 99%

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Wang

et al. 2022

Macro Materials & Eng

View full text Add to dashboard Cite

The preparation of the electromagnetic wave (EMW) absorbing materials with 3D porous structural, light weight, and high mechanical strength has been receiving greater attention for a long time. A series of light‐weight polyetheretherketone/graphite/FeCo ternary heterogeneous composite foams (PEEK/C/FeCo) with high mechanical strength are prepared via thermally induced phase separation. Based on the high compressive strength of PEEK resin and its stable skeleton formed by thermally induced phase separation, the composite foam has high compressive strength and low density. In addition, during the thermally induced phase separation process, porous structures are formed inside the PEEK, and graphite and FeCo particles are uniformly dispersed between the pore structures, the composite foams possess excellent porous structure, moderate dielectric loss, and magnetic loss, exhibiting good absorbing properties. With the low density of 0.49 g cm−3 and high compressive strength of 6.40 MPa, the as‐synthesized optimal sample (PEEK‐50/C‐40/FeCo‐10) achieves a minimum reflection loss up to −35.9 dB covering a bandwidth of 3.6 GHz for a thickness of 1.5 mm. In a word, this study provides a novel, economical, and efficient way to obtain a light foam with high mechanical strength and good EMW absorbing property.

show abstract

Section: Resultsmentioning

confidence: 99%

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Wang

et al. 2022

Macro Materials & Eng

View full text Add to dashboard Cite

show abstract

“…The Co 2p spectrum is shown in figure 3(e). Two peaks at 781.5 and 797.0 eV are fitted with Co 2p 3/2 and Co 2p 1/2 [28,30]. In figure 3(f), the binding energy at 161.9 and 163.1 eV corresponds to S 2p 3/2 and S 2p 1/2 , respectively [31,32].…”

Section: Characterization and Electrochemical Measurementsmentioning

confidence: 94%

Design and synthesis of 3D hierarchical NiMoS₄@CuCo₂S₄ array electrode with excellent electrochemical performance

Huang

Gou

2020

Nanotechnology

View full text Add to dashboard Cite

Large capacitance energy storage materials have a great application prospect due to the development of portable devices. An electrochemical deposition method was used to combine amorphous CuCo 2 S 4 with NiMoS 4 , which was prepared by a two-step hydrothermal method. The resulting grass-like nanowire array structure greatly promotes the utilization rate of active materials. By the addition of two variable valence metal ions, there is an increase in electrolyte touchable active sites and a decrease in the impedance of the electrode materials. Compared with bare NiMoS 4 , the binder-free composite electrode has a significantly better capacitance characteristic. In particular, the NiMoS 4 @CuCo 2 S 4 −8 has excellent capacity performance with a specific capacitance of 13.14 F cm −2 at the current density of 5 mA cm −2 . The electrode shows 73% capacitance retention after 2000 charge-discharge cycles. It is shown that the combined effect of the nanowires and the several variable valence metal ions is effective to increase the specific capacitance of bimetallic sulfides.

show abstract

“…19 Li and his colleagues successfully prepared FeCo@SiO 2 @PANI nanoparticles, which significantly increased the corrosion resistance of Fe−Co, endowing the absorber with outstanding stability and durability. 20 Notably, the hydrophobic properties of MCNOs with highly graphitized carbon shells have rarely been reported in the context of core−shell structures. The sharp split shell structure, considered an effective strategy for surface modification engineering of nanomaterials, enables a smooth impedance transition to reduce mismatches and significantly enhances the absorption efficiency.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The structure also effectively protects the inner core from oxidation and corrosion, prevents strong magnetic coupling, and prevents spontaneous agglomeration in low-dimensional magnets . Li and his colleagues successfully prepared FeCo@SiO 2 @PANI nanoparticles, which significantly increased the corrosion resistance of Fe–Co, endowing the absorber with outstanding stability and durability . Notably, the hydrophobic properties of MCNOs with highly graphitized carbon shells have rarely been reported in the context of core–shell structures.…”

Section: Introductionmentioning

confidence: 99%

One-Step Synthesis of Chestnut-Like Magnetic CNOs@PANI with Microwedge Enhanced Electromagnetic Wave Absorption

Li,

Zhang,

Zhang

et al. 2024

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

In this study, a novel chestnut-like structured magnetic carbon nano-onion (MCNOs)@polyaniline (PANI) core–shell material was synthesized through a one-step in situ oxidation polymerization method under ice-bath conditions. The morphology of the chestnut-like shell was influenced by the type of protonic acid and the polymerization temperature with sulfuric acid at 0–5 °C. The MCNOs@PANI composite material demonstrated improved electromagnetic wave (EMW) absorption performance, with a minimum reflection loss (RL) of −47.82 dB at 14.64 GHz and a maximum electromagnetic wave absorption bandwidth (EAB) of 4.40 GHz at a thickness of 1.5 mm. The superior EMW absorption performance was attributed to the unique chestnut-like surface structure, enhanced core–shell impedance matching, and synergistic effects of the MCNOs and PANI. The study provides a creative approach for advancing the development of carbon-based EMW absorbers with enhanced absorption capabilities.

show abstract

Synthesis and enhancement of microwave absorption property by coating silicon dioxide and polyaniline for Fe-Co alloy

Cited by 18 publications

References 32 publications

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Design and synthesis of 3D hierarchical NiMoS₄@CuCo₂S₄ array electrode with excellent electrochemical performance

One-Step Synthesis of Chestnut-Like Magnetic CNOs@PANI with Microwedge Enhanced Electromagnetic Wave Absorption

Contact Info

Product

Resources

About

Synthesis and enhancement of microwave absorption property by coating silicon dioxide and polyaniline for Fe-Co alloy

Cited by 18 publications

References 32 publications

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Facile Preparation of Light‐Weight Polyetheretherketone/Graphite/FeCo Ternary Heterogeneous Composite Foam with High Compressive Strength and Excellent Integrated Electromagnetic Wave Absorption Performance

Design and synthesis of 3D hierarchical NiMoS4@CuCo2S4 array electrode with excellent electrochemical performance

One-Step Synthesis of Chestnut-Like Magnetic CNOs@PANI with Microwedge Enhanced Electromagnetic Wave Absorption

Contact Info

Product

Resources

About

Design and synthesis of 3D hierarchical NiMoS₄@CuCo₂S₄ array electrode with excellent electrochemical performance