Journal
PHYSICA B-CONDENSED MATTER
Volume 407, Issue 16, Pages 3168-3171Publisher
ELSEVIER
DOI: 10.1016/j.physb.2011.12.055
Keywords
Magnetic Nanocomposites; Conducting polyaniline; Microwave absorption
Categories
Funding
- UBACyT (UBA) [I-011]
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The development of nanosized materials is a subject of considerable interest both for understanding of the fundamental properties of magnetic materials for new technological applications. Polyaniline, composites Fe3O4/(PANI)with conducting, magnetic and electromagnetic properties with different amounts of Fe3O4 were successfully prepared. The samples were structurally characterized by scanning electron microscopy (SEM), X-ray diffraction and transmission electron microscopy (TEM) and magnetically, with a superconducting quantum interference device (SQUID) magnetometer. In order to explore microwave-absorbing properties in X-band, the composite nanoparticles were mixed with an epoxy resin to be converted into a microwave-absorbing composite. Microwave behavior with different Fe3O4/(PANI)-epoxy resin ratio was studied using a microwave vector network analyzer (VNA) in the range 7.5 to 13 GHz. For a constant thickness of 1.5 mm, absorption increases with the magnetite contents in the composites and in the oriented samples by the application of a magnetic field. (C) 2012 Elsevier B.V. All rights reserved.
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