Effect of Additive on Microwave Absorption Properties of Hollow Ceramic Microspheres Prepared by Self-Propagating High-Temperature Synthesis (SHS) Flame Quenching Technology

Abstract:

In order to improve microwave absorption properties of hollow ceramic microspheres (HCMs) and possess the better characteristics of “thinness、width、lightness、strongness”, used Al+Cr₂O₃ as the main reaction system, hollow ceramic microspheres were prepared by SHS flame quenching technology. Microwave absorption properties of HCMs were studied when the additive is Fe. The results show that microwave absorption properties of HCMs depend on the dielectric property of product, such as SiC、mullite, when there is no additive. However, when Fe is used as additive, the microwave absorption properties of HCMs are better. SHS reaction of agglomerate powders is happened in the flame field and SiC、Fe₂O₃、Al₃Fe₅O₁₂、Cr_1.3Fe_0.7O₃、(Fe_0.6Cr_0.4)₂O₃ are synthesized. Except the dielectric property of SiC, magnetic property of HCMs is possessed due to the ferruginous materials are synthesized. So its microwave absorption properties are stronger. Keywords: additive; hollow ceramic microspheres; microwave absorption properties

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 603-607
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.603
• Online since: December 2011
• Authors: Hong Fei Lou, Jian Jiang Wang, Hong Jun Huang, Wen Bin Hu, Xing Jian Huo
• Keywords: Additive, Hollow Ceramic Microspheres, Microwave Absorption Properties

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