TY - JOUR
T1 - Permeability and EMI characteristics of Fe-Si-Al alloy flakes/polymer composite
AU - Yoshida, Shigeyoshi
AU - Sato, Mitsuharu
AU - Sugawara, Eishu
AU - Shimada, Yutaka
PY - 1999
Y1 - 1999
N2 - We investigated the frequency characteristics of permeability for an Fe-Si-Al flakes/polymer composite which has dual frequency dispersion in permeability. From the relation of Curie temperature to the powder surface area, it was found that the mother alloy composition changes with progress of attrition to excess Fe, and as a result, magneto-elastic effect seems to give a large influence on the permeability. Moreover, the results of XPS analysis for bulk samples and compositional dependence of Curie temperature suggests that oxidation of Si and Al at the powder surface leads to excess Fe in the total composition of the powder. Based on these findings, a raw material was prepared adjusting the amount of Fe. Consequently, the Fe-Si-Al flakes/polymer composite exhibits excellent EMI suppressing characteristics in a quasi-microwave band.
AB - We investigated the frequency characteristics of permeability for an Fe-Si-Al flakes/polymer composite which has dual frequency dispersion in permeability. From the relation of Curie temperature to the powder surface area, it was found that the mother alloy composition changes with progress of attrition to excess Fe, and as a result, magneto-elastic effect seems to give a large influence on the permeability. Moreover, the results of XPS analysis for bulk samples and compositional dependence of Curie temperature suggests that oxidation of Si and Al at the powder surface leads to excess Fe in the total composition of the powder. Based on these findings, a raw material was prepared adjusting the amount of Fe. Consequently, the Fe-Si-Al flakes/polymer composite exhibits excellent EMI suppressing characteristics in a quasi-microwave band.
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U2 - 10.2320/jinstmet1952.63.2_237
DO - 10.2320/jinstmet1952.63.2_237
M3 - Article
AN - SCOPUS:0033076545
SN - 0021-4876
VL - 63
SP - 237
EP - 242
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
IS - 2
ER -