Magnetic composites based on ultrafine polytetrafluoroethylene and cobalt containing nanoparticlesстатья
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Дата последнего поиска статьи во внешних источниках: 4 декабря 2016 г.
Аннотация: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.