最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
納米晶SmN/α-Fe及SmO/α-Fe復(fù)合材料的吸波特性
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項(xiàng)目:


Electromagnetic Wave Absorption Properties of Nano-Crystalline SmN/α-Fe and SmO/α-Fe Composite
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    通過SmFe合金的氫化-歧化（HD）后并結(jié)合低溫氮化或氧化法制備出了納米晶SmN/α-Fe及SmO/α-Fe雙相復(fù)合電磁波吸收材料。研究表明：在0.5~18 GHz的頻率范圍內(nèi)，SmN/α-Fe雙相復(fù)合電磁波吸收材料介電常數(shù)的實(shí)部和虛部都比SmO/α-Fe的高，而復(fù)磁導(dǎo)率卻略低于SmO/α-Fe，兩者磁導(dǎo)率虛部μr″均出現(xiàn)兩個峰，并且在較寬頻帶范圍內(nèi)保持較高值；但因SmO/α-Fe雙相復(fù)合電磁波吸收材料的磁導(dǎo)率和介電常數(shù)兩者匹配性優(yōu)于SmN/α-Fe，因而具有更好的電磁波吸收性能，其RL＜–20 dB的頻段為3.3~10.65 GHz，匹配厚度為1.6~3.95 mm，在4.8 GHz，RL達(dá)到最小值–50 dB，匹配厚度為2.92 mm。

    Abstract:

    Nano-crystalline SmN/α-Fe and SmO/α-Fe double phase composite with electromagnetic (EM) wave absorption property was prepared by hydrogenization and dehydrogenization followed by nitrogenation and oxidation treatment. The results show that the measured real part and imaginary part of dielectric constant for SmN/α-Fe are higher than that for SmO/α-Fe, but the complex EM permeability of SmO/α-Fe is higher than that of SmN/α-Fe, their imaginary parts of the relative permeability μ″ exhibit two resonant peaks and high values over the 0.5~18 GHz range. Because the match between the permeability and the dielectric constant for SmO/α-Fe is better than that for SmN/α-Fe, therefore the former has better EM wave absorption property and its RL (reflection loss) is less than –20 dB with absorber match thickness of 1.60~3.95 mm in the frequency range of 3.30~10.65 GHz. The minimum RL is –50 dB, absorber match thickness is 2.92 mm at 4.8 GHz.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

陳先富,葉金文,劉 穎,連利仙,陳 梅,涂銘旌.納米晶SmN/α-Fe及SmO/α-Fe復(fù)合材料的吸波特性[J].稀有金屬材料與工程,2009,38(4):726~729.[Chen Xianfu, Ye Jinwen, Liu Ying, Lian Lixian, Chen Mei, Tu Mingjing. Electromagnetic Wave Absorption Properties of Nano-Crystalline SmN/α-Fe and SmO/α-Fe Composite[J]. Rare Metal Materials and Engineering,2009,38(4):726~729.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2008-03-29
  • 最后修改日期:2008-11-30
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: