Effects of the morphology of CIPs on microwave absorption behaviors

• Published in: Electronic materials letters 2017, 13(6), , pp.471-477
• Main Authors: Woo, Soobin, Yoo, Chan-Sei, Kim, Hwijun, Lee, Mijung, Quevedo-Lopez, Manuel, Choi, Hyunjoo
• Format: Article
• Language: English
• Subjects: Aspect ratio; Ball milling; Carbonyl powders; Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed Matter Physics; Iron; Materials Science; Microwave absorption; Nanotechnology; Nanotechnology and Microengineering; Optical and Electronic Materials; Surface area; Surface chemistry; 전자/정보통신공학
• ISSN: 1738-8090; 2093-6788
• DOI: 10.1007/s13391-017-7002-z

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.