Ferrofluids with controlled shielding characteristics based on magnetite and multi-walled carbon nanotubes | Tekhnologii bezopasnosti zhiznedeyatelnosti – Life Safety/Security Technologies. 2024. № 8. DOI: 10.17223/29491665/8/9

Ferrofluids with controlled shielding characteristics based on magnetite and multi-walled carbon nanotubes

Studying materials with controlled electromagnetic characteristics is presented in the article. The complex permittivity spectra of ferrofluids of the following compositions were measured by impedance spectroscopy: kerosene + synthetic oil + iron oxide. Multiwall carbon nanotubes (1 wt. %) were added to composition. The effect of different orientation of a magnetic field with respect to the electric component of the electromagnetic field on the complex permittivity values is considered. It is shown that the values of the complex permittivity increase significantly with parallel orientation of the electric and magnetic fields. The spectra of the reflection coefficient for different thicknesses of ferrofluid layers in the microwave frequency range were calculated using the method of mathematical modeling. New results proving the promise of using relatively thin ferrofluid layers for solving problems of ensuring life safety when using modern high-frequency radio-electronic devices were obtained. The authors declare no conflicts of interests.

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Keywords

ferrofluids, permittivity, mathematical modeling, life safety technology, electromagnetic response, MWCNT

Authors

Name	Organization	E-mail
Pavlova Alexandra A.	National research Tomsk State University	sandy.surname@gmail.com
Suslyaev Valentine I.	National research Tomsk State University	susl@mail.tsu.ru
Korovin Evgeniy Yu.	National research Tomsk State University	korovin_ey@mail.tsu.ru
Mazilov Dmitriy A.	National research Tomsk State University	dmitrijmazilov20@gmail.com

Всего: 4

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