Transactions of Nanjing University of Aeronautics & Astronautics
Preparation and Microwave Absorption Property of Sr2FeMoO6 Powder
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Abstract:
Double perovskite oxide Sr2FeMoO6 powder is prepared by a solid state reaction method. The microwave absorption properties of Sr2FeMoO6 and paraffin wax composites are studied in the frequency range of 2—18 GHz at room temperature. The optimum absorption -36.7 dB is achieved at 17.7 GHz with a matching thickness of 5.0 mm, which indicates that Sr2FeMoO6/paraffin composites can be potential microwave absorbers in a relatively high frequency range. The excellent microwave absorption properties are attributed to the good electromagnetic match between dielectric loss and magnetic loss. The dielectric loss is considered to be caused by orientation polarization and interfacial polarization, while the magnetic loss is caused by natural resonance in the low frequency range, eddy current loss as well as exchange resonance in the high frequency range.
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CHINA AERO-SCIENCES
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