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- Title
Microwave Absorption Properties of Iron Nanoparticles Prepared by Ball-Milling.
- Authors
Chu, Xuan; Ta, Bach; Ngo, Le; Do, Manh; Nguyen, Phuc; Nam, Dao
- Abstract
A nanopowder of iron was prepared using a high-energy ball milling method, which is capable of producing nanoparticles at a reasonably larger scale compared to conventional chemical methods. Analyses using x-ray diffraction and magnetic measurements indicate that the iron nanoparticles are a single phase of a body-centered cubic structure and have quite stable magnetic characteristics in the air. The iron nanoparticles were then mixed with paraffin and pressed into flat square plates for free-space microwave transmission and reflection measurements in the 4-8 GHz range. Without an Al backing plate, the Fe nanoparticles seem to only weakly absorb microwave radiation. The reflected signal S drops to zero and a very large negative value of reflection loss ( RL) are observed for Al-backed samples, suggesting the existence of a phase matching resonance near frequency f ∼ 6 GHz.
- Subjects
MICROWAVE transmission lines; NANOPARTICLES; X-ray diffraction; MAGNETIC resonance; RADIATION
- Publication
Journal of Electronic Materials, 2016, Vol 45, Issue 5, p2311
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-015-4248-9