Functional Magnetic Composites Based on Hexaferrites: Correlation of the Composition, Magnetic and High-Frequency Properties
Functional Magnetic Composites Based on Hexaferrites: Correlation of the Composition, Magnetic and High-Frequency Properties
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DOI：
10.3390/nano9121720
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发表时间：
2019-12-01
期刊：
影响因子：
5.3
通讯作者：
Trukhanov, Sergei, V
中科院分区：
文献类型：
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作者：
Matzui, Lyudmila Yu;Trukhanov, Alex, V;Trukhanov, Sergei, V
介绍了“Ba(Fe1-xGax)(12)O-19/环氧树脂”等铁氧体功能复合材料的制备特点及其体系的研究结果；即结构、磁性能和电磁吸收特性之间的相关性。我们证明了磁性填料(Ba（Fe1-xGax)(12)O-19 0.01 < x < 0.1固溶体）的化学成分与含30 wt.%六铁氧体的功能复合材料的主要磁性（矫顽力、磁化强度、各向异性场和第一各向异性常数）和微波（共振频率和振幅）特性之间存在很强的相互影响。本文提出了复合材料的化学成分与幅频特性之间的关系。Ba(Fe1-xGax)(12)O-19/环氧复合材料中ga含量从x = 0增加到0.1，导致谐振频率从51 GHz增加到54 GHz，吸收幅度从-1.5 dB/mm增加到-10.5 dB/mm。与纯陶瓷氧化物相比，这些类型的复合材料具有较高的吸收效率和较低的成本，具有控制电磁性能的能力，在实际应用中具有广阔的前景。
The paper describes preparation features of functional composites based on ferrites, such as "Ba(Fe1-xGax)(12)O-19/epoxy," and the results of studying their systems; namely, the correlation between structure, magnetic properties and electromagnetic absorption characteristics. We demonstrated the strong mutual influence of the chemical compositions of magnetic fillers (Ba(Fe1-xGax)(12)O-19 0.01 < x < 0.1 solid solutions), and the main magnetic (coercivity, magnetization, anisotropy field and the first anisotropy constant) and microwave (resonant frequency and amplitude) characteristics of functional composites with 30 wt.% of hexaferrite. The paper presents a correlation between the chemical compositions of composites and amplitude-frequency characteristics. Increase of Ga-content from x = 0 to 0.1 in Ba(Fe1-xGax)(12)O-19/epoxy composites leads to increase of the resonant frequency from 51 to 54 GHz and absorption amplitude from -1.5 to -10.5 dB/mm. The ability to control the electromagnetic properties in these types of composites opens great prospects for their practical applications due to high absorption efficiency, and lower cost in comparison with pure ceramics oxides.