Magnetic, Microwave Absorbing Performance of Al8Mn5 Alloy with La Dopant
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The Al8Mn5 − xLax (x = 0, 0.2, 0.6, 1.0) powders were triumphantly manufactured by vacuum melting and planetary mill equipment. The influences of La content on phase constitution, morphology, saturation magnetization, and electromagnetic parameters were investigated by related equipment. The consequences demonstrate that Al8Mn4La phase, average size of particulate increases and the saturation magnetization (Ms) decreases as La content increased. The minimum reflectivity of Al8Mn4.4La0.6 powder reaches about −43.5 dB in the range of 10.8 to 11.7 GHz, and the effective bandwidth (RL < − 10 dB) can obtain about 1.70 GHz with the best matching thickness of 1.8 mm. These manifest Al8Mn5-xLax (x = 0, 0.2, 0.6, 1.0) powders possess the capacity to be excellent microwave absorbing materials.
KeywordsAl8Mn5 − xLax powders Ball milling Electromagnetic parameters Magnetic performance Microwave absorbing property
This project is 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), and Innovation Project of GUET Graduate Education (2018YJCX87).
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