Effects of the morphology of CIPs on microwave absorption behaviors

Soobin Woo, Chan Sei Yoo, Hwijun Kim, Mijung Lee, Manuel Quevedo-Lopez, Hyunjoo Choi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Electromagnetic (EM) wave absorption properties are affected by the thickness and surface area of absorbing materials. In this study, a facile ball-milling process was introduced to effectively reduce the diameter and increase the aspect ratio of carbonyl iron powder (CIP), which is one of the most commercially available EM-absorbing materials. The size, aspect ratio, and consequent surface area of CIP were manipulated by controlling the milling parameters to investigate their effects on EM absorption properties. The results indicated that ball-milled CIPs exhibited better EM wave absorption ability when compared with that of pristine CIPs. However, significant differences in minimum reflection loss values were not observed between CIPs with different morphologies and similar specific surface areas. Hence, both fine and flaky CIPs were considered as beneficial for EM wave absorption.

Original languageEnglish
Pages (from-to)471-477
Number of pages7
JournalElectronic Materials Letters
Issue number6
StatePublished - 1 Nov 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017, The Korean Institute of Metals and Materials and Springer Science+Business Media B.V.


  • ball-milling
  • carbonyl iron powder
  • electromagnetic wave absorption
  • morphology


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