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Erschienen in:
01.12.2014
Electromagnetic properties and microwave-absorption properties of BaTiO3/BaZn2Fe16O27 composite in 2–18 GHz
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 12/2014
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Abstract
BaTiO3/BaZn2Fe16O27 composites were prepared by traditional solid state method, BaTiO3 nano particles were coated around with the BaZn2Fe16O27 ferrite with hexagonal plate structure. The prepared composite particles were characterized with X-ray diffraction, scanning electron microscopy, and vector network analyzer. With the increase of BaTiO3 content, the complex permittivity of the composites increases, while the complex permeability decreases; The sharp peaks of the magnetic loss appear at 8.72 and 14.0 GHz, and the peak values are 1.64 and 0.69, respectively, when the mole ratio of BaZn2Fe16O27/BaTiO3 is 10:5; The matching thickness of BaTiO3/BaZn2Fe16O27 composites is 2.5 mm when the mole ratio of BaZn2Fe16O27/BaTiO3 is 10:5, and the minimum reflection loss reaches −33.49 dB at 8.56 GHz; There are more than one loss peak appeared in the reflection loss cures, and the effective absorption frequency (RL < −10 dB) ranges from 7.92 to 14.96 GHz with a thickness of 3 mm.