期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 323, 期 13, 页码 1805-1810出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2011.02.013
关键词
BaTiO3; Carbonyl iron; Electromagnetic property; Microwave absorbing
资金
- Taiyuan University of Science and Technology [20092050]
- Shanxi University [20090020]
BaTiO3 powders are prepared by sol-gel method. The carbonyl iron powder is prepared via thermal decomposition of iron pentacarbonyl. Then BaTiO3-carbonyl iron composite with different mixture ratios was prepared using the as-prepared material. The structure, morphology, and properties of the composites are characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction, scanning electron microscopy (SEM), and a network analyzer. The complex permittivity and reflection loss of the composites have been measured at different microwave frequencies in S-and C-bands employing vector network analyzer model PNA 3629D vector. The effect of the mass ratio of BaTiO3/carbonyl iron on the microwave loss properties of the composites is investigated. A possible microwave absorbing mechanism of BaTiO3-carbonyl iron composite has been proposed. The BaTiO3-carbonyl iron composite can find applications in suppression of electromagnetic interference, and reduction of radar signature. (C) 2011 Elsevier B.V. All rights reserved.
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