Preparation and microwave-absorbing property of EP/BaFe 12 O 19 /PANI composites

Li, Congcong; Bai, Dezhong; Tan, Lin; Chen, Nali; Wang, Yueyi

doi:10.1016/j.jmmm.2016.12.118

Cited by 32 publications

(3 citation statements)

References 35 publications

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“…The saturation magnetization (Ms), remanent magnetization (Mr), and coercivity (Hc) were 0.5 emu/g, 0.2 emu/g, and 4471.0 Oe, respectively (Figure 4.). Numerous studies have investigated the magnetic parameters of M-type BaFe12O19 nanoparticles, exhibiting Ms = 41, 54.97, 75.54 emu/g, Hc = 5450, 4964.5, and 2800 Oe [9][10][11][12], which show more paramagnetic properties in comparison to synthesized BaFe2O4 nanoparticles.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Preparation and Identification of BaFe2O4 Nanoparticles by the Sol–Gel Route and Investigation of Its Microwave Absorption Characteristics at Ku-Band Frequency Using Silicone Rubber Medium

Peymanfar

Rahmanisaghieh

Ghaffari

et al. 2018

The 3rd International Electronic Conference on Materials Sciences

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In the last decade, spinel structures have been widely explored due to widespread applications in antibacterial nanocomposites, memory devices, catalysts, photocatalysts, high-frequency devices, and electromagnetic absorbing materials. In this study, BaFe2O4 spinel structures were synthesized through the sol–gel method using a low sintering temperature and were identified by vibrating sample magnetometer (VSM), X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FE-SEM), and vector network analyzer (VNA) analysis. Results showed that uniform and pure crystal structures of BaFe2O4 nanoparticles were prepared based on the sol–gel method. Finally, BaFe2O4 nanoparticles were blended by silicone rubber to characterize the microwave absorption properties of the nanocomposite at the ku-band frequency. According to the VNA results, the BaFe2O4/silicone rubber nanocomposite with 1.75 mm thickness absorbed more than 94.38% of microwave irradiation along the ku-band frequency and the maximum reflection loss of the BaFe2O4/silicone rubber nanocomposite was 51.67 dB at 16.1 GHz.

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Section: Magnetic Propertiesmentioning

confidence: 99%

Preparation and Identification of BaFe2O4 Nanoparticles by the Sol–Gel Route and Investigation of Its Microwave Absorption Characteristics at Ku-Band Frequency Using Silicone Rubber Medium

Peymanfar

Rahmanisaghieh

Ghaffari

et al. 2018

The 3rd International Electronic Conference on Materials Sciences

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show abstract

“…The minimum RL for the coating thickness of 0.8 mm, 1.0 mm, 1.2 mm, and 1.4 mm occurs at 13.27 GHz, 13.21 GHz, 13.15 GHz, and 12.94 GHz, respectively. It can be seen that with the increasing coating thickness, the absorption peaks have a tendency to move towards low frequency, which indicates that the absorption frequency can be modulated by adjusting the thickness of the MAMs, according to the following formula: 51 …”

Section: Resultsmentioning

confidence: 99%

BaFe₁₂O₁₉/graphene/polyaniline coatings for flexible fabrics with enhanced microwave absorption

Jie,

Zhaohuan,

Zijing

et al. 2023

Textile Research Journal

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In this study, barium ferrite (BaFe12O19) was used as the basic microwave-absorbing material and compounded with graphene and PANI. Then, BaFe12O19, BaFe12O19/graphene, and BaFe12O19/graphene/PANI were mixed with waterborne polyurethane and coated on nylon fabrics by the cast coating method to prepare flexible microwave absorbing materials. The microwave absorbing performance of BaFe12O19/graphene/PANI coated fabric is significantly improved in comparison with BaFe12O19 and BaFe12O19/graphene coated fabric, which mainly comes from the synergistic effects of magnetic loss, dielectric loss, and conductivity loss. The BaFe12O19/graphene/PANI coated fabric has a minimum reflection loss value of –37.36 dB (at 13.76 GHz) and an effective absorption bandwidth of 5.40 GHz (12.44–17.84 GHz) when the thickness is 1.2 mm. Consequently, the facile preparation route and excellent performance make the BaFe12O19/graphene/PANI composite a promising candidate for efficient microwave absorbence.

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“…The reflection loss (RL) of the BFNNO with x = 0–0.8 under matching thickness ( d ) over 18–40 GHz are illustrated in Figure a–f. RL is calculated by transmission line theory as following equations based on the measured EM parameters: − R L = 20 log true| Z normalin − Z 0 italicZ normalin − Z 0 true| Z in = Z 0 μ r / ε r tanh true[ j 2 π f d c μ r / ε r true] Z in is the input impedance at the absorber surface, Z 0 is the characteristic impedance in a free space, ε r and μ r are the complex permittivity (ε r = ε′ – j ε″) and permeability (μ r = μ′ – j μ″) respectively, f is the frequency of microwave, d is the matching thickness, and c is the velocity of light.…”

Section: Resultsmentioning

confidence: 99%

Determining the Actual Composition of Nb⁵⁺–Ni²⁺ Codoped Barium Ferrites to Controllably Regulate the Microwave Absorbing Properties

et al. 2022

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The substitution amount of foreign ions for Fe3+ ions significantly influences the electromagnetic and microwave absorption performance of barium ferrite. To establish the correlation between composition and property, Nb5+–Ni2+ codoped M-type barium ferrite powders with molar ratio of the added Ba2+, Fe3+, Nb5+, and Ni2+ ions being 1:(12–2x):x:x (x = 0–0.8) were prepared by the sol–gel method. The actual substitution amount of Nb5+ and Ni2+ ions for Fe3+ ions are theoretically determined based on the measured concentrations of Fe2+ ions, surface absorbed oxygen, and the lattice parameters of the doped barium ferrite. The calculation results demonstrate that the substitution amount of Ni2+ ions is obviously lower than that of Nb5+ ions in the doped barium ferrites, while the total substitution amount of Nb5+–Ni2+ is still higher than the only Nb5+ ions doping case. As a result, the multiresonant permeability is obviously achieved and dual reflection loss peaks with broad bandwidth ∼12 GHz are apparently observed in the BFNNO with x = 0.4–0.6 over 18–40 GHz. Moreover, the frequency of reflection loss peaks can be adjusted to cover wider frequency range −18 GHz to +40 GHz with variation of x from 0 to 0.8. The developed theoretical calculation approach provides powerful guidance for the controllable design of material composition and regulation of microwave absorption.

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Preparation and microwave-absorbing property of EP/BaFe 12 O 19 /PANI composites

Cited by 32 publications

References 35 publications

Preparation and Identification of BaFe2O4 Nanoparticles by the Sol–Gel Route and Investigation of Its Microwave Absorption Characteristics at Ku-Band Frequency Using Silicone Rubber Medium

Preparation and Identification of BaFe2O4 Nanoparticles by the Sol–Gel Route and Investigation of Its Microwave Absorption Characteristics at Ku-Band Frequency Using Silicone Rubber Medium

BaFe₁₂O₁₉/graphene/polyaniline coatings for flexible fabrics with enhanced microwave absorption

Determining the Actual Composition of Nb⁵⁺–Ni²⁺ Codoped Barium Ferrites to Controllably Regulate the Microwave Absorbing Properties

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Preparation and microwave-absorbing property of EP/BaFe 12 O 19 /PANI composites

Cited by 32 publications

References 35 publications

Preparation and Identification of BaFe2O4 Nanoparticles by the Sol–Gel Route and Investigation of Its Microwave Absorption Characteristics at Ku-Band Frequency Using Silicone Rubber Medium

Preparation and Identification of BaFe2O4 Nanoparticles by the Sol–Gel Route and Investigation of Its Microwave Absorption Characteristics at Ku-Band Frequency Using Silicone Rubber Medium

BaFe12O19/graphene/polyaniline coatings for flexible fabrics with enhanced microwave absorption

Determining the Actual Composition of Nb5+–Ni2+ Codoped Barium Ferrites to Controllably Regulate the Microwave Absorbing Properties

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Product

Resources

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BaFe₁₂O₁₉/graphene/polyaniline coatings for flexible fabrics with enhanced microwave absorption

Determining the Actual Composition of Nb⁵⁺–Ni²⁺ Codoped Barium Ferrites to Controllably Regulate the Microwave Absorbing Properties