Dy对Pr_2Fe_(17)合金微波吸收特性的影响（英文）  

Effect of Dy Content on Microwave Absorption Properties of Pr_2Fe_(17) Alloy

作　　者：熊吉磊 潘顺康[1,2] 成丽春[1,2,3] 林培豪[1] 姚青荣[1,2,3] 范雨龙 

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]桂林电子科技大学广西信息材料重点实验室,广西桂林541004 [3]中南大学,湖南长沙410083

出　　处：《稀有金属材料与工程》2017年第8期2060-2064,共5页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51361007);Guangxi Natural Science Foundation(2014GXNSFAA118317,2013GXNSFAA019295);Scientific Research Project of Guangxi Education Department(YB2014139);Guangxi Key Laboratory of Information Materials(131010-Z)

摘　　要：采用电弧熔炼及高能球磨工艺制备出Dy_xPr_(2-x)Fe_(17)(x=0.0,0.1,0.2,0.3,0.4)合金微粉,借助X射线衍射(XRD)、扫描电镜(SEM)、振动样品磁强计(VSM)和网络矢量分析仪等仪器分别对合金微粉的结构、形貌、磁性能及其微波吸收性能进行了研究。结果表明,随着Dy含量的增加,Dy_xPr_(2-x)Fe_(17)微粉的饱和磁化强度降低。Dy_xPr_(2-x)Fe_(17)合金的最小反射峰频率随Dy含量的增加往高频方向移动,最小反射损耗呈先增大后减小的变化趋势;其中Dy_(0.3)Pr_(1.7)Fe_(17)合金具有最好的吸波效果,在最佳匹配厚度2.5 mm下,Dy_(0.3)Pr_(1.7)Fe_(17)合金的最小反射损耗在5.04 GHz处达到-42.38 dB左右,反射损耗小于-10 dB的频带宽度达到了1.20 GHz。The DyxPr（2-x）Fe（17）（x =0.0, 0.1, 0.2, 0.3, 0.4） powder was prepared by arc-smelting and high energy ball milling. The phase structure, morphology, magnetic properties and electromagnetic parameters of the powder were investigated by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, vibrating sample magnetometer（VSM） and vector network analyzer（VNA）, respectively. The results reveal that the saturation magnetization of the DyxPr（2-x）Fe（17） alloys decreases with the increase of Dy content. The minimum absorption peak frequency shifts towards higher frequency region upon the Dy substitution. And the minimum reflection loss of the DyxPr（2-x）Fe（17） alloys increases firstly and then decreases upon the Dy content. The Dy（0.3）Pr（1.7）Fe（17） powder exhibits the best microwave absorbing properties. The minimum reflection loss of Dy（0.3）Pr（1.7）Fe（17） powder is about –42.38 dB at 5.04 GHz, and the frequency bandwidth of RL –10 d B reaches about 1.20 GHz with the best matching thickness of 2.5 mm.

关 键 词：Dy-Pr-Fe合金 高能球磨 磁性能 电磁参数 反射损耗 

分 类 号：TG132[一般工业技术—材料科学与工程]