연자성 나노결정합금 분말의 열처리 온도에 의한 전자파 흡수 특성의 영향
Effect of Annealing Temperature on the Electromagnetic Wave Absorbing Properties of Nanocrystalline Soft-magnetic Alloy Powder
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The electromagnetic (EM) wave absorption properties with a variation of crystallization annealing temperature have been investigated in a sheet-type absorber using the Fe73Si16B7Nb3Cu1 alloy powder. With increasing the annealing temperature the complex permeability ( μr), permittivity ( εr) and power absorption changed. The EM wave absorber shows the maximum permeability and permittivity after the annealing at 610℃ for 1 hour, and its calculated power absorption is above 80% of input power in the frequency range over 1.5 GHz.
Abstract
The electromagnetic (EM) wave absorption properties with a variation of crystallization annealing temperature have been investigated in a sheet-type absorber using the Fe73Si16B7Nb3Cu1 alloy powder. With increasing the annealing temperature the complex permeability ( μr), permittivity ( εr) and power absorption changed. The EM wave absorber shows the maximum permeability and permittivity after the annealing at 610℃ for 1 hour, and its calculated power absorption is above 80% of input power in the frequency range over 1.5 GHz.
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