Preparation and Microwave Absorption Properties of La-Ho-Fe Alloys

IF 0.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY 稀有金属材料与工程 Pub Date : 2018-12-01 DOI:10.1016/S1875-5372(19)30012-8
Luo Jialiang , Pan Shunkang , Qiao Ziqiang , Cheng Lichun , He Yu , Chang Junqing
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引用次数: 2

Abstract

The LaxHo2-xFe17 (x=0.0, 0.2, 0.4, 0.6, 0.8) powders were prepared by arc melting and high energy ball milling. The influence of the La substitution on phase structure, morphology, magnetic properties and electromagnetic parameters were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating-sample magnetometry (VSM) and vector network analyzer (VNA), respectively. The results show that the saturation magnetization increases and the average particle size increases with the increase of La content. The minimum absorption peak frequency shifts towards a lower frequency region with the increase of La content. The minimum reflection loss (RL) of La0.2Ho1.8Fe17 reaches –28.72 dB at 8.72 GHz, and the frequency bandwidth of RL<–10 dB reaches about 2.32 GHz with the best matching condition d=1.8 mm. The reflection loss with the thickness ranging of 1.2∼2.4 mm could reach –10 dB, which indicates that the particles are considered as the promising microwave absorbing materials with better absorption properties.

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La-Ho-Fe合金的制备及其微波吸收性能
采用电弧熔炼和高能球磨法制备了LaxHo2-xFe17 (x=0.0, 0.2, 0.4, 0.6, 0.8)粉末。采用x射线衍射仪(XRD)、扫描电镜(SEM)、振动样品磁强计(VSM)和矢量网络分析仪(VNA)分别研究了La取代对材料相结构、形貌、磁性能和电磁参数的影响。结果表明:随着La含量的增加,饱和磁化强度增大,平均粒径增大;随着La含量的增加,最小吸收峰频率向低频区偏移。La0.2Ho1.8Fe17的最小反射损耗(RL)在8.72 GHz时达到-28.72 dB, RL< -10 dB的频宽达到2.32 GHz左右,最佳匹配条件d=1.8 mm。厚度为1.2 ~ 2.4 mm的粒子的反射损失可达-10 dB,表明该粒子具有较好的吸收性能,是一种很有前途的吸波材料。
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来源期刊
稀有金属材料与工程
稀有金属材料与工程 工程技术-材料科学:综合
CiteScore
1.30
自引率
57.10%
发文量
17973
审稿时长
4.2 months
期刊介绍:
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