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초록· 키워드
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We report the electromagnetic wave absorption performance of carbonyl iron-particles (CIP) magnetic fillers in a polydimethylsiloxane (PDMS) matrix prepared by using a doctor blade method. The X-ray diffraction and the field-emission scanning electron microscopy studies of the CIPs revealed a BCC crystal structure and an average diameter of 3 μm. For the CIPs, the saturation magnetization, MS , was 205 emu/g, and the coercivity, HC was around 12 Oe. The microwave absorption properties were measured using a vector network analyzer in the frequency range from 0.1 to 18 GHz. We observed a systematic increase in the minimum reflection loss (RL) with increasing weight fraction of CIP fillers (46 wt% to 72 wt%) in the PDMS matrix. The minimum RL was -27.5 dB at 14.6 GHz with a thickness of only 1.5 mm and an effective absorption bandwidth of up to 6.8 GHz (RL @ -10 dB). Therefore, the present study suggests that CIP magnetic fillers in a PDMS matrix are a good candidate for thin, broadband absorbing fillers.
목차
I. INTRODUCTION
II. EXPERIMENTS
III. RESULTS AND DISCUSSION
IV. CONCLUSIONS
REFERENCES
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