期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 542, 期 -, 页码 43-50出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.07.049
关键词
Composite materials; Oxide materials; Magnetic measurements; X-ray diffraction; Microwave absorption
资金
- Iran University of Science and Technology
In this study, the synthesis of magnetic nanocomposites with the special stoichiometries of Ba0.34Sr0.34Cd0.16Zn0.16Fe12O19 (S1) and Ba0.69Sr0.17Cd0.07Zn0.07Fe12O19 (S2), having microwave absorbing properties were successfully carried out and reported. These nanoparticles were synthesized using self-assembly reflux reaction followed by heating treatment. The scanning electron microscopy (SEM) images depicted the uniform morphology of particles with the average sizes of 43 and 38 nm for the samples (S1) and (S2), respectively. The saturation magnetizations of 65.09 and 66.59 emu/g were analyzed using a VSM technique at room temperature for these uniform nanoparticles. The X-ray diffraction (XRD) patterns revealed that the matrices of both produced samples have been made from M-type hexagonal structure. The microwave absorbing characteristics were investigated via measuring the absorption of electromagnetic waves by these products with various thicknesses in the frequency range of 8-12 GHz (X-band). These nanocomposites revealed the enhanced reflection loss (R. L.) properties due to calcination process at different temperatures and improvement of the crystalline structures. The reflection losses of -35 and -23 dB were simply obtained for the resulting (S1) and (S2) nanocomposites with the optimum thickness of 2.1 mm. These results suggest that the synthesized magnetic composites can be employed as effective microwave absorbers in various devices. (C) 2012 Elsevier B. V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据