Interface Strategy To Achieve Tunable High Frequency Attenuation

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• 作者：Hualiang Lv ; Haiqian Zhang ; Guangbin Ji ; Zhichuan J. Xu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 16, 2016
• 年：2016
• 卷：8
• 期：10
• 页码：6529-6538
• 全文大小：740K
• ISSN：1944-8252

文摘

Among all polarizations, the interface polarization effect is the most effective, especially at high frequency. The design of various ferrite/iron interfaces can significantly enhance the materials’ dielectric loss ability at high frequency. This paper presents a simple method to generate ferrite/iron interfaces to enhance the microwave attenuation at high frequency. The ferrites were coated onto carbonyl iron and could be varied to ZnFe₂O₄, CoFe₂O₄, Fe₃O₄, and NiFe₂O₄. Due to the ferrite/iron interface inducing a stronger dielectric loss effect, all of these materials achieved broad effective frequency width at a coating layer as thin as 1.5 mm. In particular, an effective frequency width of 6.2 GHz could be gained from the Fe@NiFe₂O₄ composite.