Article
Materials Science, Ceramics
Sungjoon Choi, Jae-Hyoung You, Chris Yeajoon Bon, Seung-young Park, Sang-Im Yoo
Summary: Enhanced microwave absorption properties were achieved in SrFe2-xZnxF hexaferrite filler-epoxy resin matrix composites. Partially Zn-substituted composites showed the best performance in the 3.4-3.8 GHz and 5.9-7.1 GHz ranges.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Mohammad Rostami, Motahareh Jafarpour, Mohammad Hossein Majles Ara
Summary: The microwave absorption properties of Co-Al-Ti substituted barium hexaferrite-multiwalled carbon nanotubes (MWCNTs)-epoxy resin nanocomposites were thoroughly investigated in the frequency range of 1-18 GHz. The nanocomposites exhibited appropriate microwave absorption properties, high efficiency, light weight, and small thickness, making them promising candidates for microwave absorbers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
P. T. Tho, C. T. A. Xuan, N. Tran, N. Q. Tuan, W. H. Jeong, S. W. Kim, T. Q. Dat, V. D. Nguyen, T. N. Bach, T. D. Thanh, D. T. Khan, B. W. Lee
Summary: Cu, Co, and Ti elements were co-doped to SrFe12O19, and it was found that the microwave absorption performance of SrFe12O19 can be significantly improved through co-doping. All samples showed good microwave absorption performance in terms of reflection loss and effective absorption bandwidth, with one sample exhibiting the ability to cover multiple microwave frequency bands.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
M. A. Almessiere, Y. Slimani, N. A. Algarou, M. A. Gondal, Y. S. Wudil, M. Younas, I. A. Auwal, A. Baykal, A. Manikandan, T. Zubar, V. G. Kostishin, A. Trukhanov, I Ercan
Summary: The study prepared hard/soft nanocomposites using a sol-gel auto-combustion technique, showing complete exchange-coupled effects between phases and excellent electrodynamic parameters.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Applied
Sagar E. Shirsath, R. H. Kadam, K. M. Batoo, Danyang Wang, Sean Li
Summary: In this study, the magnetic properties of Sr0.8Ca0.2AlxCoxFe12-2xO19 hexagonal ferrites were improved through Co2+-Al3+ substitution. These ferrites show great potential as rare earth-free magnets with improved saturation magnetization, coercivity, and microwave absorption characteristics. This research highlights the possibility of using hexagonal ferrites as alternatives to rare earth-based permanent magnets.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Muhammad Zarrar Khan, Iftikhar Hussain Gul
Summary: Our research provides a systematic study of the electrical, magnetic and microwave absorption properties of La-Co substituted Ba-Sr hexaferrite nanoparticles and MWCNTs encapsulated in a conductive polymer matrix. The synthesized samples showed good energy dissipation behavior and microwave absorption performance, highlighting their potential for reducing electromagnetic signatures in commercial and military applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Xicong Ye, Qi Gao, Peng Yang, Chao Yang, Enyi He, Yongsheng Ye, Haihua Wu
Summary: 3D printing technology allows for flexible material components and structure design, leading to widespread attention. In this study, graphene and Mn-Zn ferrite were incorporated into polylactic acid as reinforcement. The composite wires were prepared through ball-mill mixing and melt extrusion, followed by fused deposition molding to obtain the composites. The graphene content was found to affect the mechanical and wave absorption properties of the composites. Optimal microwave absorption performance was achieved with a graphene content of 4 wt.%, showing a maximum reflection loss of -24.3 dB and an absorption bandwidth of 5.12 GHz at a material thickness of 2.5 mm, while maintaining a tensile strength of 34.4 MPa. The results indicate that the GR-MZF/PLA composites prepared in this study possess excellent microwave absorption properties and load-bearing capacity.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Nyathani Maramu, D. Ravinder, T. Anil Babu, M. Srinivas, B. Ravinder Reddy, G. Sriramulu, Katlakuntla Sadhana, N. V. Krishna Prasad
Summary: A series of silver-doped strontium hexaferrite were synthesized by the Co-precipitation method, and their crystal structure, morphology, and microwave absorption properties were studied. The results showed that the lattice parameters increased and grain size decreased with the increase of Ag doping, leading to improved microwave absorption properties in X-band frequencies. The study confirmed the nature of microwave absorption for Ag-doped strontium hexaferrite.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Zeynep Ertekin, Mustafa Secmen, Mustafa Erol
Summary: Polymer-based dielectric materials with modified carbon black, graphite, and expanded graphite incorporated with an ionic liquid were investigated for their electromagnetic shielding effectiveness. The addition of the ionic liquid enhanced the ionic conductivity and polarizability of the composites. The e-GR showed better dispersion and superior shielding effectiveness compared to modified CB and GR in the PVDF matrix. The homogeneity of the composites was found to be sufficient, with IL e-GR achieving over 9.5 dB/mm and 11.5 dB/mm shielding effectiveness at X and Ku-bands, respectively.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Seyed Mahmood Tabatabaei Fard, Mahmood Moradi, Mohammad Mehdi Golshan
Summary: Substituting various concentrations of Ti, Mn, and Zn for the ferric cation in M-type Ba-hexaferrite, this study synthesized BaTi2xMnxZnxFe12-4xO19/MWCNT nanocomposites through modified sol-gel auto-combustion synthesis. The successful substitution of cations in the hexagonal lattice structure was confirmed, and the nanocomposites showed appropriate microwave absorption properties. These developed nanocomposites are recommended for use in equipment where thickness and weight of the absorbing material are important.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Materials Science, Multidisciplinary
Mohsen Bozorgmehr, Gholam Reza Gordani, Ali Ghasemi, Majid Tavoosi
Summary: The SrZn2-x(MnCa)(x/2)Fe16O27(x = 0-0.6) nanoparticles synthesized by Co-precipitation method and single walled carbon nanotube (SWCNTs) were used to prepare microwave absorption nanocomposite. The samples were characterized using X-ray diffractometry (XRD), scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR) spectroscopy, vibrating sample magnetometry (VSM), and vector network analyzer (VNA). The addition of divalent cations resulted in structural changes that affected the magnetization (M) and coercivity (Hc) of the samples. The nanocomposite sample containing x = 0.4 hexaferrite nanoparticles and SWCNTs exhibited significant microwave absorption properties, with a maximum reflection loss of -42 dB at 10.2 GHz.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Physical
Neha Aggarwal, Sukhleen Bindra Narang
Summary: The study shows that substitution of cobalt and zirconium in nickel-zinc spinel ferrites affects the structure and performance of the materials, with substituted samples exhibiting high dielectric and magnetic losses, and showing excellent microwave absorption performance in the X band at specific thicknesses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Sandeep Kumar Singh, Yaswanth K. Penke, J. Ramkumar, M. J. Akhtar, Kamal K. Kar
Summary: This work focuses on the synthesis and application of Al substituted copper ferrite infused reduced graphene oxide (rGO) as a microwave absorbing material. The results show that infusing Al substituted copper ferrite into rGO enhances the absorption capacity. The fabricated CAF-rGO/epoxy nanocomposite exhibits excellent microwave absorption performance under low filler content and small matching thickness conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Jiabin Ma, Biao Zhao, Huimin Xiang, Fu-Zhi Dai, Yi Liu, Rui Zhang, Yanchun Zhou
Summary: In this study, three new high-entropy spinel ferrite ceramics were designed and synthesized with excellent electromagnetic absorbing capabilities. Among them, (Mg0.2Mn0.2Fe0.2Co0.2Ni0.2)Fe2O4 showed the best performance in electromagnetic wave absorption.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Materials Science, Multidisciplinary
Eun-Soo Lim, Hyungsuk K. D. Kim, Young-Min Kang
Summary: La-Co-Ti substituted Sr-hexaferrite powder-epoxy composites were fabricated for electromagnetic wave absorption. The electromagnetic absorption frequency range can be controlled by varying the substitution x, leading to high EM absorbing performances suitable for X band and millimeter range applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)