A novel 'one-pot' synthetic method for preparation of (Ni0.65Zn0.35Fe2O4)x-(BaFe12O19)1-x nanocomposites and study of their microwave absorption and magnetic properties

被引:35
|
作者
Hazra, Subhenjit [1 ]
Ghosh, Barun Kumar [1 ]
Patra, Manoj Kumar [2 ]
Jani, Raj Kumar [2 ]
Vadera, Sampat Raj [2 ]
Ghosh, Narendra Nath [1 ]
机构
[1] Birla Inst Technol & Sci, Dept Chem, Nanomat Lab, Zuarinagar 403726, Goa, India
[2] Def Lab, Jodhpur 342011, Rajasthan, India
关键词
Hard soft ferrite nanocomposites; One-pot synthesis; Spring exchange coupling; Magnetic measurements; Microwave absorption; ELECTROMAGNETIC-WAVE ABSORPTION; EXCHANGE-COUPLING INTERACTION; DIELECTRIC-PROPERTIES; CARBON NANOTUBE; COMPLEX PERMITTIVITY; FERRITE; HEXAFERRITE; BEHAVIOR; IRON; PERMEABILITY;
D O I
10.1016/j.powtec.2015.03.046
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this paper, we report a simple but novel aqueous solution based 'one-pot' method for preparation of (Ni0.65Zn0.35Fe2O4)(x)-(BaFe12O19)(1-x), nanocomposites consisting of hard ferrite-soft ferrite phases. Nanocomposites, having same compositions, have also been prepared by employing a physical mixing method. X-ray diffraction analysis showed the presence of nanocrystalline Ni0.65Zn0.35Fe2O4 and BaFe12O19 phases in the composites, prepared by both methods. However, transmission electron microscopic and scanning electron microscopic analysis revealed that, nanocomposites, prepared by one-pot method, possessed better homogeneous intimacy of Ni0.65Zn0.35Fe2O4 and BaFe12O19 phases than that of the nanocomposites, prepared by physical mixing method. Nanocomposites, prepared by one-pot method, have shown magnetically single phase behaviour with good spring exchange coupling interaction between hard and soft ferrite phases. These composites possessed enhanced magnetic properties with high saturation magnetization as well as high coercivity. These nanocomposites also exhibited very good microwave absorption properties in the X-band region. Composite having composition (Ni0.65Zn0.35Fe2O4)(0.85)-(BaFe12O19)(0.15) showed the minimum reflection loss of similar to-21dB (>99% absorption) at 9.86 GHz for absorber thickness of 3.05 mm. Magnetic and microwave absorption properties of-the nanocomposites, prepared by one-pot method, were found be superior to those of the nanocomposites prepared by physical mixing method as well as pure Ni0.65Zn0.35Fe2O4 and BaFe12O19 nanoparticles. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:10 / 17
页数:8
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