纳米复相α-Fe /Nd2Fe14B材料电磁波吸收性能研究

摘要

采用熔体快淬及晶化退火工艺制备了Nd2Fe14B/α-Fe纳米晶双相材料,对该材料在0.5～18 GHz频段的复介电常数、复磁导率进行了测试,其磁谱表现为驰豫型特征.由于磁损耗和介电损耗的共同作用,纳米复相Nd2Fe14B/α-Fe吸波材料在9～17 GHz具有良好的吸波性能,其匹配厚度为1.6～2.5 mm.%The α-Fe/Nd2Fe14B nanocomposites were prepared using a melt-spinning method and subsequent annealing treatment. The complex permittivity, permeability of composites was measured in the 0.5～18 GHz frequency range. The permeability spectra exhibits relaxation type characteristic. The α-Fe/Nd2Fe14B composites shows an excellent microwave absorption property (reflection loss: RL<-20 dB) in 9～17 GHz with thin matching thickness 1.6～2.5 mm due to the cooperate effect of magnetic loss and dielectric loss.