TY - JOUR N2 - We fabricated two different kinds of composite materials for absorbing microwave in a frequency range of 2 to 18 GHz using coaxial airline and thru-reflect-line (TRL) method. The composite materials having carbon nanotube (CNT) with carbonyl iron (CI) or iron oxide (Fe3O4) were fabricated by mixing each components. Magnetic properties were measured by SQUID equipment. Complex permittivity and complex permeability were also obtained by measuring S-parameters of the toroidal specimen dispersing CI/CNT and Fe3O4/CNT into the 50 weight percent (wt%) epoxy resin. The real permittivity was improved by mixing the CNT however, the real permeability was same as pure magnetic powders. The CI/CNT had a maximum value of real permittivity and real permeability, 11 and 1.4 at 10 GHz, respectively. The CNT composites can be adapted to the radar absorbing materials, band width 8-12 GHz. L1 - http://journals.pan.pl/Content/108044/PDF/AMM-2018-3-64-Park.pdf L2 - http://journals.pan.pl/Content/108044 PY - 2018 IS - No 3 EP - 1516 DO - 10.24425/123841 KW - Magnetic powders KW - Complex permittivity KW - Complex permeability KW - composite materials KW - Microwave absorption A1 - Park, Jung Hyo A1 - Choi, Jaeho A1 - Lee, Kisu A1 - Park, Jinwoo A1 - Song, Jung Kun A1 - Jeon, Eunkyung PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 63 DA - 2018.10.10 T1 - Enhanced Microwave Absorption of CNT Composites Mixing with Fe3O4 and Carbonyl Iron SP - 1513 UR - http://journals.pan.pl/dlibra/publication/edition/108044 T2 - Archives of Metallurgy and Materials ER -