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首页> 外文期刊>Physica, B. Condensed Matter >Microwave absorption properties of Sr_2FeMoO_6 nanoparticles
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Microwave absorption properties of Sr_2FeMoO_6 nanoparticles

机译：Sr_2FeMoO_6纳米粒子的微波吸收特性

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摘要

The microwave absorption properties of nanosized double perovskite Sr _2FeMoO_6 and epoxy resin composites were investigated in the frequency range of 218 GHz using the coaxial method. The Sr _2FeMoO_6 composites with an optimal 20 wt% epoxy resin showed a strong electromagnetic attenuation of -49.3 dB at 8.58 GHz with a matching thickness of 2.15 mm. Moreover the optimum absorption frequency at which the reflection loss is less than -20 dB, which corresponds to 99% reflection loss of the incident microwave, is from 5.7 to 13.2 GHz with the matching thickness ranging from 3.0 to 1.5 mm. The excellent microwave-absorption properties are a consequence of a proper electromagnetic match due to the existence of the insulating matrix of anti-site defects and anti-phase domains, which not only contribute to the dielectric loss but also to the reduced eddy current loss.
机译：采用同轴法研究了纳米钙钛矿型Sr_2FeMoO_6和环氧树脂复合材料在218 GHz频率范围内的微波吸收性能。具有最佳20 wt％环氧树脂的Sr _2FeMoO_6复合材料在8.58 GHz处具有4.9.3 dB的强电磁衰减，匹配厚度为2.15 mm。此外，反射损耗小于-20 dB（对应于入射微波的99％反射损耗）的最佳吸收频率为5.7至13.2 GHz，匹配厚度为3.0至1.5 mm。优异的微波吸收性能是由于存在反位缺陷和反相域的绝缘基质而导致的适当电磁匹配的结果，这不仅有助于介电损耗，而且有助于减小涡流损耗。

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