【摘要】 本文研究了Ｎｉ粉／Ｎｉ－Ｚｎ铁氧体的导电导磁复合材料在１～１０００ＭＨｚ频率范围内的磁导率复合特性。结果表明，Ｎｉ粉含量在≤４７．５％时，复合材料的等效μ′和μ″均符合两相复合材料的一般复合规律；当Ｎｉ粉含量≥６３．３％，频率为５００～１０００ＭＨｚ时，出现复合材料的μ′随频率上升而升高，及复合材料的μ″在一定的频段内大于两单体材料的μ″的反常现象，这是由于在一定的高频作用下，较高含量的Ｎｉ粉因高频涡流损耗所产生的热量使Ｎｉ－Ｚｎ铁氧体μ′和μ″产生变化所致。更多还原

【Abstract】 The composite permeability in the range 1～1000MHz of the conductive and magnetic composite consisting of nickel powder and Ni Zn ferrite was studied. It was found out that, when the nickel content was equal to or less than 47.5%, the composite permeability (μ′,μ″) accorded with the usual composite rules, and that, when equal to or greater than 63.3% and the frequency was in the range 500～1000MHz, an unusual phenomenon appeared, where the real permeability μ′ increased with the frequency increasing, and the imaginary permeability was greater than of the single material in a certain frequency range. This is because the heat from the eddy attenuation of nickel powder in the higher content could change the real and imaginary permeability (μ′,μ″) of Ni Zn ferrite.更多还原