Lightweight broadband microwave absorbers of core-shell (polypyrrole/NiZn ferrite) nanocomposites in the X-band: insights on interfacial polarization

被引：15
|
作者：
Ali, Nassim Nasser [1 ]
Atassi, Yomen [1 ]
Salloum, Akil [1 ]
Malki, Adnan [1 ]
Jafarian, Mojtaba [2 ]
Almarjeh, Rama Kassar Bani [1 ]
机构：
[1] Higher Inst Appl Sci & Technol, Dept Appl Phys, Damascus, Syria
[2] Islamic Azad Univ, Fac Engn, Dept Mech Engn, Tehran North Branch, Tehran, Iran
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2019年 / 30卷 / 07期
关键词：
ABSORPTION PROPERTIES; COMPOSITES; IONS;
D O I：
10.1007/s10854-019-01002-y
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Polypyrrole/Ni0.5Zn0.5Fe2O4 (PPy/NiZn ferrite) nanocomposites are prepared using the in-situ chemical oxidative polymerization method of pyrrole in the presence of the ferrite. The composites are characterized using scanning and transmission electron microscopies, vibrating sample magnetometry, thermal gravimetric analysis, X-ray diffractometry, Fourier transform infrared spectroscopy and UV-visible spectroscopy. The microwave absorption characteristics are performed by measuring the reflection loss in the X-band. The results indicate the presence of a maximum reflection loss of -30.0 dB at 10.9GHz with a matching thickness of 3.0mm and a bandwidth of 3.6GHz for a weight ratio PPy/NiZn ferrite of 2:1 and a loading not exceeding 7.5% w/w of nanocomposite in a host matrix of paraffin wax. The surface density of the absorber is only 2.74kg/m(2). The role of interfacial polarization in promoting microwave absorption characteristics is also highlighted.
引用
收藏
页码：6876 / 6887
页数：12
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