Abstract
Coatings made of materials that can efficiently absorb radiation, e.g., ferrite materials, are used to reduce the level of electromagnetic radiation in rooms containing household or industrial equipment. It is known that significant dissipation of the radiation energy can be provided by the thickness of the shielding coating which should be comparable to the electromagnetic wave length in the material, which, in turn, significantly decreases at high magnetic permeability and dielectric constant inherent in a radiofrequency-absorbing material. Radiofrequency-absorbing ferrite coatings are characterized by a high level of heat resistance, a low level of flammability, and a small (10–20 mm) thickness. However, at frequencies less than 40 MHz, the plate thickness should be higher than 30 mm to provide an efficient absorption level. In this case, the weight and cost of such coatings exhibit a significant increase. This paper presents the results of studying the effect of sintering temperature and titanium, calcium, and bismuth oxide dopants exerted on the dielectric constant of Ni- and Mn-Zn radiofrequency-absorbing ferrites. Reagent grade starting oxide components with a content of basic substance higher than 99.6 wt % have been used to synthesize samples on the basis of traditional oxide technology. It is shown that alloying with bismuth and titanium oxides is rather efficient for obtaining radiofrequency-absorbing ferrites that combine a high level of magnetic permeability and high dielectric constant. The obtained results can be used in the manufacture of radiofrequency-absorbing ferrite materials operating in the megahertz range.
REFERENCES
Detlaf, A.A. and Yavorskiy, V.M., Kurs fiziki, uchebnik dlya tekhnicheskikh VUZov (Physics Course: Textbook for Technical Colleges), Moscow: Akademiya, 2008.
Alekseyev, A.G., Shtager, E.A., and Kozyrev, S.V., Fizicheskie osnovy tekhnologii STEALTH (Physical Foundations of Stealth Technology), St. Petersburg: VVM, 2007.
Maria, K.H., Akther, U.S., Esha, I.N., Hossain, M.S., et al., Estimation of structural, electrical, and magnetic variations of Mn-Ni-Zn ferrites by substituting rare earth Y3+ for high-frequency applications, J. Supercond. Novel Magn., 2020, vol. 33, no. 7, pp. 2133–2142. https://doi.org/10.1007/s10948-020-05471-9
Das, B., Alam, F., and Akther, A., The crystallographic, magnetic, and electrical properties of Gd3+-substituted Ni-Cu-Zn mixed ferrites, J. Phys. Chem. Solids, 2020, vol. 142, p. 109433. https://doi.org/10.1016/j.jpcs.2020.109433
Letyuk, L.M. and Zhuravlev, G.I., Khimiya i tekhnologiya ferritov (Ferrite Chemistry and Technology), Leningrad: Khimiya, 1983, p. 258.
Antsiferov, V.N., Letyuk, L.M., Andreev, V.G., Gonchar, A.V., et al., Problemy poroshkovogo materialovedeniya. Chast’ 5. Tekhnologiya proizvodstva poroshkovykh ferritovykh materialov (Problems of Powder Materials Science, Part 5. Technology of Production of Powder Ferrite Materials), Yekaterinburg: UrO RAN, 2005.
Smit, J. and Wijn, H.P.J., Ferrites, Eindhoven: Philips Tech. Lib., 1959.
Krupička, S., Physics of Ferrites and Related Magnetic Oxides, Prague: Academy, 1973.
Okadzaki, K., Ceramic Engineering for Dielectrics, Tokyo: 1969.
Pokusin, D.N., Chukhlebov, E.A., and Zalessky, M.Yu., Complex magnetic permeability of ferrites in the field of natural ferromagnetic resonance, Radiotekh. Elektron., 1991, vol. 36, no. 11, pp. 2085–2091.
Satyanarayana, G., Rao, G., Babu, K., Kumar, G., et al., Influence of chromium substitution on structural, electrical, and magnetic properties of Ni-Zn-Cu ferrites, Acta Phys. Polon. A, 2020, vol. 138, no. 3, pp. 355–363. https://doi.org/10.12693/APhysPolA.138.355
Henaish, A., Mostafa, M., Salem, B., and Hemeda, O., Improvement of magnetic and dielectric properties of magnetoelectric BST-NCZMF nano-composite, Phase Trans., 2020, vol. 93, no. 5, pp. 470–490. https://doi.org/10.1080/01411594.2020.1758322
Kostishin, V.G., Vergazov, R.M., Andreev, V.G., Bibikov, S.B., et al., Effect of microstructure on the properties of radio-absorbing nickel-zinc ferrites, Izv. Vyssh. Uchebn. Zaved., Mater. Elektron. Tekh., 2010, no. 4, pp. 18–21.
Gonchar, A.V., Andreev, V.G., Letyuk, L.M., Krutogin, D.G., et al., Possibilities of increasing the electromagnetic parameters of ferrites for television equipment, Izv. Vyssh. Uchebn. Zaved., Mater. Elektron. Tekh., 1998, no. 1, pp. 41–44.
Funding
This work was supported by the state contract no. P953 of May 27, 2010 and the Russian Science Foundation, agreement no. 19-19-00694 of May 6, 2019.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors declare that they have no conflicts of interest.
Additional information
Translated by O. Polyakov
Rights and permissions
About this article
Cite this article
Kostishin, V.G., Vergazov, R.M., Menshova, S.B. et al. Effect of Dopants on the Magnetic Permeability and Dielectric Constant of Spinel Ferrites. Inorg Mater 58, 1501–1505 (2022). https://doi.org/10.1134/S0020168522150031
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0020168522150031