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Magnetic composites based on ultrafine polytetrafluoroethylene and cobalt containing nanoparticles

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Abstract

Composite materials based on ultrafine polytetrafluoroethylene and cobalt-containing nanoparticles were synthesized by the method of high-speed thermal decomposition of cobalt formate in a pseudoboiling layer of grains of ultrafine polytetrafluoroethylene. It has been found that ultrafine polytetrafluoroethylene is a composite material that consists of a core of polytetrafluoroethylene and a membrane of fluoroalkanes. In the formation of cobalt nanoparticles, interaction between them and the shell of ultrafine polytetrafluoroethylene-fluoroalkanes takes place. The result of the interaction is the formation of cobalt fluoride, which makes a significant contribution to the magnetic properties of composite materials. At room temperature, ferromagnetic behavior is characteristic for materials; the coercive force at 300 K is 700 Oe, while at 77 K it reaches 900 Oe.

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Correspondence to L. V. Chursova.

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Original Russian Text © G.Yu. Yurkov, V.M. Buznik, S.V. Kondrashov, M.I. Biryukova, M.G. Mikheev, V.A. Bogatov, L.V. Chursova, 2013, published in Vse Materialy. Entsiklopedicheskii Spravochnik, 2013, No. 1, pp. 2–8.

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Yurkov, G.Y., Buznik, V.M., Kondrashov, S.V. et al. Magnetic composites based on ultrafine polytetrafluoroethylene and cobalt containing nanoparticles. Polym. Sci. Ser. D 6, 232–237 (2013). https://doi.org/10.1134/S199542121303026X

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