Microwave absorption properties of the carbon-coated nickel nanocapsules

被引：786

作者：

Zhang, X. F.

Dong, X. L. ^{[1
]}

Huang, H.

Liu, Y. Y.

Wang, W. N.

Zhu, X. G.

Lv, B.

Lei, J. P.

Lee, C. G.

机构：

[1] Dalian Univ Technol, State Key Lab Mat Modificat Laser Ion & Electron, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China

[3] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, Kyoung Nam, South Korea

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 05期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2236965

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The carbon-coated Ni(C) nanocapsules were prepared by a modified arc-discharge method in methane atmosphere. Its electromagnetic parameters were measured at 2-18 GHz. It is observed that the natural resonance which appeared at 5.5 GHz is dominant among microwave absorption properties of Ni(C) nanocapsules, as the consequence of the increased surface anisotropic energy for nanosized particles. The measured relative complex permittivity indicates that a high resistivity existed in Ni(C) nanocapsules samples. The maximum reflection loss of Ni(C) nanocomposites can reach 32 dB at 13 GHz with 2 mm in thickness. The microwave absorptive mechanisms of Ni(C) nanocapsule absorbent were discussed.

引用

页数：3

共 20 条

[1] Advantages of ferromagnetic nanoparticle composites in microwave absorbers [J].