TY - GEN
T1 - Electromagnetic properties of silver coated iron based alloy powders prepared by chemical reduction method
AU - Lee, Byoung Yoon
AU - Lee, Jae Wook
AU - Yun, Yeo Chun
AU - Jeong, In Bum
AU - Moon, Jooho
PY - 2007
Y1 - 2007
N2 - The synthesis of silver coated iron base alloy (Sendust : Fe-Si-Al) powder having the both effects of shielding and suppressing of electromagnetic wave was studied. Depending on thickness of silver coating layer, the electromagnetic properties of the dispersed particles complexed with organic binder were examined. EDS-SEM, XRD, ohm meter, network analyzer (PNA8364A) measurements were used to characterize the electromagnetic properties. The silver coated powders have a better microwave absorbance than non coated powder in the low frequency range of below 1.0GHz, which is due to a high dielectric constant and dielectric loss of the silver in microwave frequencies magnetic loss in addition to conduction loss. Reflection loss of the 5% silver containing composite was found to be -6 dB at 1.0GHz with 1.0mm thickness. It is, therefore, successfully proposed that the silver coated sendust flake powders with controlled electrical properties and thickness can be used as thin microwave absorbers in quasi-microwave frequency band.
AB - The synthesis of silver coated iron base alloy (Sendust : Fe-Si-Al) powder having the both effects of shielding and suppressing of electromagnetic wave was studied. Depending on thickness of silver coating layer, the electromagnetic properties of the dispersed particles complexed with organic binder were examined. EDS-SEM, XRD, ohm meter, network analyzer (PNA8364A) measurements were used to characterize the electromagnetic properties. The silver coated powders have a better microwave absorbance than non coated powder in the low frequency range of below 1.0GHz, which is due to a high dielectric constant and dielectric loss of the silver in microwave frequencies magnetic loss in addition to conduction loss. Reflection loss of the 5% silver containing composite was found to be -6 dB at 1.0GHz with 1.0mm thickness. It is, therefore, successfully proposed that the silver coated sendust flake powders with controlled electrical properties and thickness can be used as thin microwave absorbers in quasi-microwave frequency band.
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U2 - 10.4028/0-87849-419-7.1449
DO - 10.4028/0-87849-419-7.1449
M3 - Conference contribution
AN - SCOPUS:38349126677
SN - 0878494197
SN - 9780878494194
T3 - Materials Science Forum
SP - 1449
EP - 1452
BT - Progress in Powder Metallurgy - Proceedings of the 2006 Powder Metallurgy World Congress and Exhibition (PM 2006)
PB - Trans Tech Publications Ltd
T2 - 2006 Powder Metallurgy World Congress and Exhibition, PM 2006
Y2 - 24 September 2006 through 28 September 2006
ER -