Magnetic and microwave absorbing properties of Ce-Co-based alloy powders driven with lanthanum content  

作　　者：Yu He Shunkang Pan Jingjing Yu 

机构地区：[1]School of Material Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China

出　　处：《Journal of Rare Earths》2020年第7期749-754,I0003,共7页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (51361007);2017 Director Fund of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing (GXKL06170107)。

摘　　要：The composites of Ce-Co-based alloys doped with La content were fabricated via a vacuum arc melting method.The influences of La addition on microstructure,electromagnetic parameters,magnetic property and microwave absorbing property were measured by the corresponding equipment.The morphology characteristics manifest that all samples display sheet structure,and the average particle size of alloy powders increases with increasing La content The saturation magnetization(MS) decreases with increasing La addition as a whole.The minimum reflection loss(RL) of La0.4Ce1.6Co17 alloy powder about-42.29 dB can be obtained about-42.29 dB at 7.84 GHz with the matching thickness of 1.8 mm,and the corresponding effective bandwidth can achieve about 2.24 GHz.In addition,the minimum RL frequency moves towards a lower frequency region as the La content increases.The minimum RL of La0.3Ce1.7Co17alloy powder is less than-20 dB ranging from 1.2 to 2.4 mm in the whole 4-16 GHz.The maximum bandwidth can reach about 4.88 GHz at the given thickness of 1.2 mm.In general,these all indicate that the La addition is beneficial to improving the microwave absorbing performance in both effective bandwidth and absorption intensity.

关 键 词：Ce-Co-Based alloys Magnetic property Microwave absorbing property Reflection loss Rare earths 

分 类 号：TF123[冶金工程—粉末冶金] TB33[冶金工程—冶金物理化学]