caa a22 4500 463225694 CHVBK 20180405153226.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s10853-007-2081-0 doi (NATIONALLICENCE)springer-10.1007/s10853-007-2081-0 Enhancement of magnetic losses in hybrid polymer composites with MnZn-ferrite and conductive fillers [Elektronische Daten] [Robert Moučka, Alexander Lopatin, Natalia Kazantseva, Jarmila Vilčáková, Petr Sáha] Polymer composites (PCs) with a polyurethane (PU) matrix filled with magnetic filler (MnZn ferrite) and hybrid polymer composites (HPCs) consisting of this magnetic filler and various types of conductive fillers (carbon black, carbon fibers, aluminum powder, polypyrrole) are prepared. The matrix structure of a HPC is formed (i) by a polymer filled with conductive filler, which forms the skeleton of an infinite cluster, and (ii) by ferrite particles that are larger than conductive particles. Thus, an HPC represents an ensemble of ferrite particles each of which is surrounded by a conductive medium and can be considered as a "core-shell” structure. The development of a core-shell structure is evidenced by the lower electric percolation threshold in an HPC compared with that in PU filled with conductive filler. Magnetic and dielectric spectra of PCs and HPCs are studied in the frequency range from 1MHz to 10GHz. Hybrid systems exhibit a considerable enhancement of magnetic losses compared with PCs. The enhancement of magnetic losses in HPCs is due to the conduction currents that are induced in the conductive shell by a microwave magnetic field. Springer Science+Business Media, LLC, 2007 Moučka Robert Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut Lopatin Alexander Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut Kazantseva Natalia Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut Vilčáková Jarmila Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut Sáha Petr Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/22(2007-11-01), 9480-9490 0022-2461 42:22<9480 2007 42 10853 https://doi.org/10.1007/s10853-007-2081-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-2081-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Moučka Robert Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut NATIONALLICENCE 700 1- Lopatin Alexander Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut NATIONALLICENCE 700 1- Kazantseva Natalia Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut NATIONALLICENCE 700 1- Vilčáková Jarmila Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut NATIONALLICENCE 700 1- Sáha Petr Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, 76272, Zlin, Czech Republic aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/22(2007-11-01), 9480-9490 0022-2461 42:22<9480 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer