氮化铁/膨胀石墨的穆斯堡尔谱研究  

The M ssbauer investigation in iron nitride/expanded graphite

作　　者：刘伟[1] 杨健[1] 黄玉安[2] 翟亚[3] 张瑞利[1] 唐涛[1] 黄润生[1] 

机构地区：[1]南京大学物理学院,南京210093 [2]南京工程学院材料工程学院,南京211167 [3]东南大学物理系,南京211102

出　　处：《核技术》2013年第1期71-75,共5页Nuclear Techniques

基　　金：国家863计划(2006AA03Z458);国家自然科学基金(50977042;10904061)资助

摘　　要：用气氛还原氮化法成功将氮化铁纳米颗粒植入膨胀石墨,制备出具有优良磁性和射频屏蔽效能的材料。XRD测量表明不同温度氮化反应,制备的材料中含铁物相有变化。用57Fe的穆斯堡尔谱,详细分析了不同反应温度下反应产物的相组分。结果表明,随着温度的上升,在400°C之前,Fe颗粒逐渐被氮化直至完全,400°C以后氮化铁中的γ-Fe4N逐渐向ε-FexN(2<x<3)转化。We successfully prepared the composites possessed high magnetic properties and shielding effectiveness （SE） in RF band with the methods of loading iron nitride nanoparticles on expanded graphite （EG） by the gaseous reduction and nitridation. XRD measurement shows that the ferric phases changed in different nitridation temperature. The phase components of nanoparticles were analyzed in detail by the measurement of 57Fe MOssbauer spectra. The result shows that as the temperature increased, the Fe particles were gradually nitride until completely before 400℃ and the γ-FenN was gradually converted to ε-FexN （2〈x〈3） in iron nitride after 400℃.

关 键 词：氮化铁 膨胀石墨 穆斯堡尔谱 

分 类 号：O481.4[理学—固体物理]