Vol. 34

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2011-08-30

Enhanced Polarization in Tadpole-Shaped (Ni, Al)/AlN Nanoparticles and Microwave Absorption at High Frequencies

By Hao Huang, Fang Hong Xue, Bo Lu, Fei Wang, Xing Dong, and Won Jo Park
Progress In Electromagnetics Research B, Vol. 34, 31-46, 2011
doi:10.2528/PIERB11071101

Abstract

Tadpole-shaped (Ni, Al)/AlN nanoparticles were synthesized via evaporating Ni-Al alloy in a mixed atmosphere of N2 and H2. As a counterpart, the spherical-shaped (Ni, Al)/Al2O3 The electromagnetic parameters of as-made nanoparticles/paraffin composites were then investigated in the frequency range of 2-18 GHz. Excellent microwave absorption can be obtained for the tadpole-shaped (Ni, Al)/AlN-paraffin composite at high frequencies and in a thin layer, which is thought to be the result of the enhanced polarization in the anisotropic tadpole-shaped nanoparticles. With the increasing of the composite thickness, the frequency of effective reflection loss shifts towards lower frequencies due to an improved impedance match and absorption.

Citation


Hao Huang, Fang Hong Xue, Bo Lu, Fei Wang, Xing Dong, and Won Jo Park, "Enhanced Polarization in Tadpole-Shaped (Ni, Al)/AlN Nanoparticles and Microwave Absorption at High Frequencies," Progress In Electromagnetics Research B, Vol. 34, 31-46, 2011.
doi:10.2528/PIERB11071101
http://www.jpier.org/PIERB/pier.php?paper=11071101

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