通过SmFe合金的氢化.歧化(HD)后并结合低温氮化或氧化法制备出了纳米晶SmN/α-Fe及SmO/α-Fe双相复合电磁波吸收材料.研究表明:在0.5～18 GHz的频率范围内,SmN/α-Fe双相复合电磁波吸收材料介电常数的实部和虚部都比SmO/α-Fe的高,而复磁导率却略低于SmO/α-Fe,两者磁导率虚部μr″均出现两个峰,并且在较宽频带范围内保持较高值;但因SmO/α-Fe双相复合电磁波吸收材料的磁导率和介电常数两者匹配性优于SmN/α-Fe,因而具有更好的电磁波吸收性能,其RL<-20 dB的频段为3.3～10.65 GHz,匹配厚度为1.6～3.95 mm,在4.8 GHz,RL达到最小值-50dB,匹配厚度为2.92 mm.
参考文献
| [1] | Snoek J L .[J].Physica,1948,14:207. |
| [2] | Koji Miura;Masahiro Masuda;Masahiro Itoh .Microwave absorption properties of the nano-composite powders recovered from Nd-Fe-B bonded magnet scraps[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(0):1391-1395. |
| [3] | Lian L X;Deng L J et al.[J].Journal of Alloys and Compounds,2007,441:301. |
| [4] | 周寿增;董清飞.超强永磁体[M].北京:冶金工业出版社,1999:406. |
| [5] | 叶金文,刘颖,李梦,高升吉,涂铭旌.Sm2Fe17合金的氢化-歧化过程演化[J].中国稀土学报,2005(03):303-306. |
| [6] | 叶金文,刘颖,李芳,李梦,高升吉,涂铭旌.氢化后Sm2Fe17合金粉的脱氢-再化合过程演化[J].稀有金属材料与工程,2005(12):2002-2005. |
| [7] | Coey JMD. .Permanent magnet applications [Review][J].Journal of Magnetism and Magnetic Materials,2002(3):441-456. |
| [8] | 李芳,刘颖,杨锦,高升吉,涂铭旌.快淬法制备SmFeN稀土永磁合金粉的研究[J].金属功能材料,2004(03):1-4. |
| [9] | Sugimoto S;Kagotani T et al.[J].Journal of Alloys and Compounds,2002,330-332:301. |
| [10] | Liu Jiurong;Itoh Masahiro;Jiang Jianzhuang et al.[J].Journal of Magnetism and Magnetic Materials,2004,271:147. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%