Preparation and Efficacy of the Magnetic Expanded Graphite for Infrared/Millimeter Wave Interference Material

• Main Authors: Lan, Chih-Hsiang, 藍志祥
• Other Authors: Wu, Kuo-Hui
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/91008108304505045206

碩士 === 國防大學理工學院 === 化學工程碩士班 === 102 === A composite based on magnetic iron particle and expanded graphite is preparing by an explosion method and introduce into polyethylene (PE) and colloidal silicone rubber (RTV-615) to measure the infrared and millimeter wave shielding effectiveness with thermal imager and network analyzer. Microwave absorbing properties are investigate by measuring reflection loss in the 2 ~ 40 GHz microwave frequency using the free space method. The effects of structure, media material type (Carbonyl iron powder、Fe3O4) and weight ratio on the electromagnetic properties of magnetic expanded graphite are investigated. Another, the magnetic expanded graphite is introduced into the smoke container for dynamic testing with thermal imager. The spectroscopic characterizations of the formation processes of magnetic expanded graphite are examined using FTIR, XRD, SEM and VSM. These results could be a valuable reference for the shielding effect of high frequency electromagnetic wave and infrared. The results showed that the magnetic expanded graphite composites have good spectral masking properties and evenly dispersed, as the new good infrared (8~14 µm) and millimeter wave (2-40 GHz) interference materials.