Magnetodielectric Microwave Radiation Absorbent Materials and Their Polymer Composites

Magisetty, RaviPrakash; Shukla, Anuj; Kandasubramanian, Balasubramanian

doi:10.1007/s11664-018-6580-3

Cited by 45 publications

(22 citation statements)

References 318 publications

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“…In the future, an important work will be done to establish electromagnetic shielding for the detection system to resist the interference electromagnetic from free space. It can be implemented by adopting the microwave shielding material [23] or the microwave absorbing material [24], which have been widely used for military.…”

Section: Discussionmentioning

confidence: 99%

Experimental study on differential diagnosis of cerebral hemorrhagic and ischemic stroke based on microwave measurement

Wang

Zhang

Bao

et al. 2020

THC

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BACKGROUND: Hemorrhagic stroke and ischemic stroke have similar symptoms at the onset of the disease, but their clinical treatment is completely different. The early, effective identification of stroke types can effectively improve the cure rate. OBJECTIVE: In this study, an early, noncontact identification of the stroke type, i.e., hemorrhagic or ischemic, based on a microwave measurement technique was investigated. METHODS: This study was based on animal models of cerebral hemorrhage and cerebral ischemia and the design of a microwave scattering parameter measurement system. RESULTS: The accuracy of the cerebral hemorrhage model with a blood loss interval of 2 ml reached 93.75%. While the accuracy of the cerebral ischemia model with an ischemic interval of 42 minutes reached 91.7%. CONCLUSION: The experimental results show that the system for identifying cerebral stroke based on microwaves can distinguish between cerebral hemorrhage and cerebral ischemia models and effectively distinguish between different degrees of cerebral hemorrhage or different durations of cerebral ischemia. This experimental system is inexpensive, portable, noninvasive, simple, and rapid and thus has good potential as a method for identifying the stroke type prior to hospitalization.

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Section: Discussionmentioning

confidence: 99%

Experimental study on differential diagnosis of cerebral hemorrhagic and ischemic stroke based on microwave measurement

Wang

Zhang

Bao

et al. 2020

THC

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“…To extend this relation to higher values of , we apply the integration embedding method. 42 Starting with a matrix with relative dielectric permittivity m , we replace a small volume of its material Áv 1 (per unit volume of the composite) with filler, and calculate the dielectric permittivity of the composite c, 1 by means of equations (2) and (7). Afterwards, a new matrix is considered with dielectric permittivity c, 1 , in which another infinitesimal volume Áv 2 is replaced with filler, and its dielectric permittivity c, 2 is calculated by using the same approach.…”

Section: Modelmentioning

confidence: 99%

“…3 Development of cost-efficient, flexible, lightweight, and thermally and chemically stable polymer composites for enhanced EM attenuation have recently attracted substantial attention. 4 At the initial stage, the research has mainly concentrated on the EM properties of composites with carbonaceous 5,6 and ferromagnetic 7 particles. In the past few years, the focus has been shifted to polymers reinforced with “2D materials beyond graphene,” 8 a wide family of monolayer nanomaterials that involve single-element 2D nanosheets (silicene, germanene, stanene, etc.…”

Section: Introductionmentioning

confidence: 99%

Modeling dielectric permittivity of polymer composites filled with transition metal dichalcogenide nanoparticles

Drozdov

Christiansen

2020

Journal of Composite Materials

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A model is developed for the dielectric permittivity of polymer nanocomposites reinforced with transition metal dichalcogenide fillers at microwave frequencies. The model takes into account aggregation of nanoparticles into clusters (that involve both filler and matrix components) and the aspect ratio of aggregates. The governing equations involve four material parameters that are found by matching observations on the real and imaginary parts of the dielectric permittivity of polymers reinforced with MoS2 and WS2 micro- and nanospheres, MoS2 nanosheets and nanoflowers, and composite heterostructures formed by MoS2 and MoS2-CoS2 nanoparticles with graphene and reduced graphene oxide. Good agreement is demonstrated between results of simulation and the experimental data at frequencies in the S, X, and Ku bands of the electromagnetic spectrum. It is shown that composite heterostructures have superior dielectric properties compared with those of neat transition metal dichalcogenide nanoparticles.

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“…3 A common approach, which is used to full the abovementioned needs, is the fabrication of composite microwave absorbing materials that consist of magnetic and dielectric loss components. Magnetodielectric core-shell structures of metals and metal-oxides 4 are very popular along with composites based on graphene 5,6 and other carbon materials. 7 Additionally, microwave absorbing polymer composites have been developed to benet from the light weight nature of such materials.…”

Section: Introductionmentioning

confidence: 99%

Tunable microwave absorption of switchable complexes operating near room temperature

et al. 2020

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Magnetodielectric Microwave Radiation Absorbent Materials and Their Polymer Composites

Cited by 45 publications

References 318 publications

Experimental study on differential diagnosis of cerebral hemorrhagic and ischemic stroke based on microwave measurement

Experimental study on differential diagnosis of cerebral hemorrhagic and ischemic stroke based on microwave measurement

Modeling dielectric permittivity of polymer composites filled with transition metal dichalcogenide nanoparticles

Tunable microwave absorption of switchable complexes operating near room temperature

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