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The Effect of Carbon Black Additions on Electromagnetic Wave Absorption of Fe73Si16B7Nb3Cu1 Base P/M Sheets

Published online by Cambridge University Press:  15 March 2011

Sun-I Kim ,
K. Y. Sohn  and
W. W. Park
Sun-I Kim
Affiliation:
School of Nano Engineering, Inje University, 607 Obang-dong, Gimhae, Gyeongnam 621-749, Republic of Korea
K. Y. Sohn
Affiliation:
School of Nano Engineering, Inje University, 607 Obang-dong, Gimhae, Gyeongnam 621-749, Republic of Korea
W. W. Park
Affiliation:
School of Nano Engineering, Inje University, 607 Obang-dong, Gimhae, Gyeongnam 621-749, Republic of Korea
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Abstract

Melt-spun Fe73-Si16-B7-Nb3-Cu1 (at%) amorphous strip was pulverized and then crystallized to obtain nano-grain structure at 540° for 1h under a nitrogen atmosphere. Carbon black of 0.1∼ 1wt% and its dispersant were mixed with the nano-grain structured Fe-based powder for 1h via ball milling for 1h. The mixture was tape-cast with a polymer-based organic binder, and dried at 100° to make a thin sheet. The microstructure and electromagnetic wave absorption properties of the sheet were investigated using a network analyzer. As a result, the properties of electromagnetic wave absorption were improved by the increase of dielectric loss, which was mainly caused by the increase of complex permittivity with the addition of carbon black.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1118: Symposium K – Magnetic Nanostructures by Design , 2008 , 1118-K07-11
Copyright
Copyright © Materials Research Society 2009

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References

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