The influence of morphology, structure, and weight fraction of magnetic additives on the electromagnetic characteristics of composites

Published on Aug 15, 2019in Journal of Magnetism and Magnetic Materials2.717
· DOI :10.1016/J.JMMM.2019.03.085
Simone de Souza Pinto1
Estimated H-index: 1
(Metropolitan University),
Simone de Souza Pinto5
Estimated H-index: 5
(Metropolitan University)
+ 1 AuthorsMirabel Cerqueira Rezende1
Estimated H-index: 1
(UNIFESP: Federal University of São Paulo)
Sources
Abstract
Abstract This study deals with different magnetic additives based on ferrites (MnZn, LaCa (Co and Ti)), carbonyl iron (CI), and iron filaments (IF) formulated in epoxy resin. Morphological and structural characteristics of the additives were evaluated. Based on these additives samples with both different thickness and weight fractions (1-70 wt%) were prepared. The formulated composites were analyzed considering different electromagnetic characteristics: reflectivity, shielding effectiveness, the complex parameters of dielectric permittivity (e) and magnetic permeability (µ), and the corresponding loss tangents in the microwave X-band. Scanning electron microscopy assisted with energy-dispersive spectrometry (SEM-EDS) analyses show that the additives have different morphologies, with varied sizes, shapes, and compositions. X-ray diffraction (XRD) analyses allowed determining the structural phases of the magnetic additives: CI and IF are constituted by Fe-α phase, the ferrite of MnZn has an unique phase, and the two ferrites of LaCa-Co and LaCa-Ti have the same phase in the presence of different metallic oxides. In general, the complex parameters of e and µ increased with the additive concentration increase in the composites, as expected, considering the magnetic characteristics of all additives studied. Reflectivity measurements show different attenuation values with promising results for composites based on CI, IF, and MnZn ferrite. The composites based on the ferrites show the worst performance on the reflectivity measurements. The shielding effectiveness measurements show good results (20 dB) over the entire X-band for specimens based on the LaCa-Co ferrite. In this case, the dominant shielding mechanism is due to the multiple scattering (SE M ) in the material.
📖 Papers frequently viewed together
51 Citations
1 Citations
36 Citations
References35
Newest
#1A. Delfini (Sapienza University of Rome)H-Index: 11
#2M. AlbanoH-Index: 6
Last. Mario Marchetti (Sapienza University of Rome)H-Index: 27
view all 7 authors...
In this review, some results of the experimental activity carried out by the authors on advanced composite materials for space applications are reported. Composites are widely employed in the aerospace industry thanks to their lightweight and advanced thermo-mechanical and electrical properties. A critical issue to tackle using engineered materials for space activities is providing two or more specific functionalities by means of single items/components. In this scenario, carbon-based composites...
8 CitationsSource
#1Ehsan Esmaeilnezhad (SBUK: Shahid Bahonar University of Kerman)H-Index: 7
#2Hyoung Jin Choi (Inha University)H-Index: 72
Last. Seung Hyuk Kwon (Inha University)H-Index: 13
view all 6 authors...
Abstract The addition of additives to soft-magnetic carbonyl iron (CI)-based magnetorheological (MR) suspensions is a popular method for solving the intrinsic sedimentation problem. In this study, synthesized magnetite nanoparticles were added to a CI suspension and its enhanced MR properties were investigated using a rotational rheometer. Based on an analysis of the variance, two models were introduced to assess the yield stress and shear viscosity in terms of the CI concentration, additive con...
25 CitationsSource
#1Tae Hong Min (Inha University)H-Index: 3
#2Hyoung Jin Choi (Inha University)H-Index: 72
Last. Chun-Yeol You (DGIST: Daegu Gyeongbuk Institute of Science and Technology)H-Index: 28
view all 5 authors...
Abstract To achieve better chemical affinity between conducting polyaniline (PANI) and soft magnetic carbonyl iron (CI) microspheres, we initially attached hydroxyl groups to the surface of CI using p-toluenesulfonic acid monohydrate. The PANI-coated CI composite particles were then fabricated via a chemical oxidation polymerization method. Both the aniline monomer and anilinium cation tended to surround the activated surface of the CI microspheres due to hydrogen bonding and electrostatic inter...
25 CitationsSource
#1Changxian Wang (PKU: Peking University)H-Index: 9
#2Mingji Chen (BIT: Beijing Institute of Technology)H-Index: 27
Last. Daining FangH-Index: 64
view all 7 authors...
Abstract A non-magnetic broadband radar absorbing structure (RAS) composed of glass fiber composite and multilayer frequency selective surface (FSS) films was designed, with subsequently optimizing and manufacturing for radar absorbing and mechanical investigations. The results revealed that the proposed RAS exhibited −10 dB absorption from 8 GHz to 18 GHz at thickness of 3.5 mm, with a substantially broadened absorption bandwidth via dual absorption peaks. Due to the embedment of FSS films, the...
36 CitationsSource
#1Davide Micheli (Sapienza University of Rome)H-Index: 25
#2Roberto Pastore (Sapienza University of Rome)H-Index: 20
Last. Ekaterina VasilyevaH-Index: 5
view all 9 authors...
Abstract In this work the electromagnetic characterization of composite materials reinforced with carbon and metallic nanoparticles is presented. In particular, the electric permittivity and the magnetic permeability as a function of the frequency are used to evaluate the electromagnetic absorption capability of the nanocomposites. The aim is the study of possible applications in advanced coating able to tune the electromagnetic reflectivity of satellite surfaces in specific frequency ranges, in...
29 CitationsSource
#1Omid Khani (Shahid Chamran University of Ahvaz)H-Index: 3
#2Morteza Zargar Shoushtari (Shahid Chamran University of Ahvaz)H-Index: 13
Last. Plamen Stamenov (Trinity College, Dublin)H-Index: 26
view all 4 authors...
Abstract An increase in microwave permeability is a prerequisite for reducing the thickness of radar absorber coatings. The aim of this paper is to increase the magnetic loss of commercial carbonyl iron particles for fabricating wideband microwave absorbers with a multilayer structure. For this purpose, carbonyl iron particles were milled and their static and dynamic magnetic properties were studied before and after milling. A distinct morphological change from spherical to flake-like particles ...
48 CitationsSource
#1Munnazza Bibi (HU: Hazara University)H-Index: 1
#2Syed Mustansar Abbas (Dongguk University)H-Index: 20
Last. Salah Ud-Din Khan (KSU: King Saud University)H-Index: 17
view all 7 authors...
Abstract The ferrite nanoparticles and ferrite/multiwall carbon nanotubes (Cu0.25Ni0.25Zn0.5Fe2O4/MWCNTs) nanocomposites with different concentrations of MWCNTs as filler are synthesized using co-precipitation and solution-mixing techniques. In brief, the MWCNTs were first purified for their quick dispersion and then acid functionalized to introduce carboxylic groups for effectively attaching ferrite nanoparticles and epoxy. These nanocomposites were examined for permittivity and permeability wh...
47 CitationsSource
#1Davide Micheli (Sapienza University of Rome)H-Index: 25
#2Roberto Pastore (Sapienza University of Rome)H-Index: 20
Last. Mario Marchetti (Sapienza University of Rome)H-Index: 27
view all 4 authors...
A lot of effort has been devoted in the last decades by technology research to realizing materials with a priori defined electromagnetic (EM) properties. One of the challenges at present is to configure the reflection coefficient ( RC ) of a structure so that any shape of a fixed microwave response is followed. A method for realizing microwave absorbers made by carbon nanocomposite layers assembly able to mimic a given reflection profile is described and experimentally validated. The multilayer ...
33 CitationsSource
#1Yijun Chen (NPU: Northwestern Polytechnical University)H-Index: 1
#2Aibo Zhang (NPU: Northwestern Polytechnical University)H-Index: 8
Last. Honglong Lu (NPU: Northwestern Polytechnical University)H-Index: 4
view all 5 authors...
Abstract A three-dimensional absorber hybrid with polar oxygen-containing functional groups was fabricated by the incorporation of two-dimensional reduced graphene oxide (rGO) with one-dimensional multi-walled carbon nanotubes (MWNTs) via ultrasonication filtration method. The aim of the work is to investigate the effectiveness of three-dimensional absorber hybrid with polar oxygen-containing functional groups on the enhanced microwave absorbing properties. As a contrast, the three-dimensional a...
63 CitationsSource
#1Davide Micheli (Sapienza University of Rome)H-Index: 25
#2Roberto Pastore (Sapienza University of Rome)H-Index: 20
Last. Fabio Santoni (Sapienza University of Rome)H-Index: 17
view all 6 authors...
Abstract This chapter deals with the vector network analyzer systems used for the study of the electromagnetic properties of materials. The focus of the chapter is not the device itself, about which plenty of literature is available, but its application in materials characterization at the microwave and millimeter wave levels. Some interesting measurement techniques are presented and discussed in detail with the help of numerous experimental results. Moreover, the measurement criteria are commen...
10 CitationsSource
Cited By8
Newest
#1Anna Paula Godoy (Mackenzie Investments)
#2Leice G. Amurim (Mackenzie Investments)
Last. Ricardo J. E. Andrade (Mackenzie Investments)H-Index: 8
view all 12 authors...
Abstract Herein, it was investigated the development of a low-cost conductive coating for application in the field of Electromagnetic Interference shielding (EMI shielding). The coating was produced with reduced graphene oxide (rGO), considered an excellent technological alternative for graphene applications, and styrene-ethylene/butylene-styrene (SEBS) block copolymer. The rGO was obtained by reduction of graphene oxide (GO) using ascorbic acid as a “green” and efficient reducing agent, and Ram...
Source
#1Jefersson Alexander Rojas (UNIFESP: Federal University of São Paulo)
#2Luís Santos (UNESP: Sao Paulo State University)H-Index: 5
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
view all 5 authors...
Source
#2Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
view all 2 authors...
1 CitationsSource
#1Bruno Ribeiro (UNIFESP: Federal University of São Paulo)H-Index: 7
#2Jefersson Alexander Rojas Corredor (UNIFESP: Federal University of São Paulo)H-Index: 2
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 5 authors...
Glass fiber/epoxy-reinforced multi-walled carbon nanotube buckypaper composites (GF/EP/BP) were fabricated by hot compression molding process to evaluate its electromagnetic interference (EMI) shielding efficiency (SE) in the X-band (8.2–12.4 GHz) frequency range. Scanning electron microscopy (SEM) revealed a porous structure for the CNT film and good overall quality of the GF/EP/BP composite with no apparent voids or defects associated to the lamination process. The electrical conductivity of t...
1 CitationsSource
#1Chen Wu (ZJU: Zhejiang University)H-Index: 12
#2Kai Bi (ZJU: Zhejiang University)H-Index: 1
Last. Mi Yan (ZJU: Zhejiang University)H-Index: 2
view all 3 authors...
Scalable and low cost fabrication of light weight flexible electromagnetic (EM) wave absorbers is highly desirable for the rapid development of wearable electronic devices. A simple method has been provided involving incorporating rationally designed FeNi3/Mo2C into cellulose fibers in the formation of thin and flexible absorbing papers with tunable electromagnetic parameters. High-performance absorption has been achieved with the minimum reflection loss (RL) reaching -51.50 dB at 13.7 GHz and e...
2 CitationsSource
#1Hüsnügül Yilmaz Atay (Izmir Kâtip Çelebi University)H-Index: 4
#2Oyku Icin (İzmir Institute of Technology)H-Index: 1
An indicator of being a strong country in today's world is that they have powerful weapons. In this sector where science is used exceedingly, the “stealth” takes an important place. Radar-absorbing...
1 CitationsSource
#1J.A. Rojas (UNIFESP: Federal University of São Paulo)H-Index: 3
#2Bruno Ribeiro (UNIFESP: Federal University of São Paulo)H-Index: 7
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 3 authors...
Abstract Serrated and rectangular strips designs of highly porous carbon nanotube buckypaper (BP) were incorporated between the layers of glass fiber/epoxy resin composites (GF/EP) and their electromagnetic and mechanical properties were evaluated. The laminates were studied by their complex electrical permittivities, reflectivity, and electromagnetic interference (EMI) shielding effectiveness (SE) in the X-band (8.2–12.4 GHz) and Ku-band (12.4–18 GHz). A large region promoting the electromagnet...
9 CitationsSource
#1Bruno Ribeiro (UNIFESP: Federal University of São Paulo)H-Index: 7
#2Jefersson Alexander Rojas Corredor (UNIFESP: Federal University of São Paulo)H-Index: 2
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 5 authors...
5 CitationsSource
#1Peng Wang (Lanzhou University)H-Index: 31
#2Guowu Wang (Lanzhou University)H-Index: 8
Last. Tao Wang (Lanzhou University)H-Index: 5
view all 8 authors...
Abstract In this paper, we present the design of a thin triple-layer sandwich-structure absorber (SSA) based on the composites of polyurethane (PU) with different mass filler fraction of the core–shell Fe@B2O3 nanoparticles and MoS2 microflowers for achieving a broadband absorption of EM waves. The absorbing performance of the proposed SSA is calculated using the EM parameters of the single-layer absorbers (SLA) prepared by the Fe@B2O3/PU and MoS2/PU composites. For designing the SSA, we optimiz...
7 CitationsSource