Electromagnetic wave absorption properties of iron/rare earth oxide composites dispersed by amorphous carbon powder

被引：24

作者：

Li, DS ^{[1
]}

Horikawa, T ^{[1
]}

Liu, JR ^{[1
]}

Itoh, M ^{[1
]}

Machida, K ^{[1
]}

机构：

[1] Osaka Univ, Ctr Adv Sci & Innovat, Suita, Osaka 5650871, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 408卷

关键词：

Nd-Fe-B sintered magnets; amorphous carbon; nanocomposites; ball-milling; electromagnetic wave absorption;

D O I：

10.1016/j.jallcom.2005.04.109

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Sludge powders of Nd-Fe-B sintered magnets were oxidized at 250-325 degrees C for 2 h and then the alpha-Fe/Fe2B/Nd2O3/amorphous carbon (a-C) nanocomposite powders were prepared by ball-milling the sludge with the a-C powder for 12-40 h. The resin composites of 75 mass% of these nanocomposite powders showed excellent electromagnetic wave absorption properties in GHz range. The effective absorption of RL <-20 dB were observed in a range of 7.6-18.0 GHz and the minimum absorption peaks around -58.5 dB appeared at 12.0 GHz with matching thickness of 1.9 mm for the samples heated at 300 degrees C for 2 h and then ball-milled with 4.8 mass% a-C for 30 h. (c) 2005 Published by Elsevier B.V.

引用

页码：1429 / 1433

页数：5

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