Microwave absorbing properties of hollow microspheres plated with magnetic metal films

2014 ◽  
Vol 115 (17) ◽  
pp. 17A528 ◽  
Author(s):  
Sun-Tae Kim ◽  
Sung-Soo Kim
Keyword(s):  
Metal Films ◽  
Hollow Microspheres ◽  
Microwave Absorbing Properties ◽  
Magnetic Metal ◽  
Microwave Absorbing

Microwave Absorbing Properties of Flaky Fe-Si-Al Alloy Powder-Rubber Composites

2007 ◽  
Vol 534-536 ◽  
pp. 1465-1468 ◽  
Author(s):  
Kyung Sub Lee ◽  
Yeo Chun Yun ◽  
In Bum Jeong ◽  
Sung Soo Kim
Keyword(s):  
Aspect Ratio ◽  
Reflection Loss ◽  
Alloy Powder ◽  
Complex Permeability ◽  
Al Alloy ◽  
Magnetic Composite ◽  
Attrition Mill ◽  
Microwave Absorbing Properties ◽  
Magnetic Metal ◽  
Microwave Absorbing

The frequency profile of complex permeability (μr) and permittivity (εr) and their relationship with microwave absorbing properties are investigated in soft magnetic metal-polymer composite materials. The Fe-Si-Al alloy powder was forged by an attrition mill to get the flaky shape. The composite sheet was fabricated in which the flaky powder was dispersed in the polymer and aligned in the direction perpendicular to the electromagnetic wave propagation. We found that dielectric loss (εr") spectra for composite sheets can be controlled by combining the aspect ratio of the flaky powder and the contents of the filler. The permittivity (εr). of magnetic composite was increased with attrition milling time. The maximum attenuation peak of reflection loss is shifted to lower frequency ranges as the aspect ratio increased, while the value of the maximum attenuation peak gets smaller gradually. From these results, we could design a noise absorber sheet (t=1.0 ㎜) for a quasi-microwave band, which is impedance matched at 1.8 ㎓ with respect to -7.7 ㏈ reflection loss.

Preparation of multi-shelled conductive polymer hollow microspheres by using Fe3O4 hollow spheres as sacrificial templates

2014 ◽  
Vol 50 (83) ◽  
pp. 12493-12496 ◽  
Author(s):  
Rui Pang ◽  
Xiujie Hu ◽  
Shuyun Zhou ◽  
Chenghua Sun ◽  
Jun Yan ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Conductive Polymer ◽  
Hollow Microspheres ◽  
Template Method ◽  
Sacrificial Template ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing

An ingenious and controllable sacrificial template method has been reported to prepare multi-shelled conductive polymer hollow microspheres with excellent microwave absorbing properties.

Effect of surface modification on microwave absorbing properties of magnetic metal fibers

2007 ◽  
Vol 22 (2) ◽  
pp. 218-220 ◽  
Author(s):  
Wei Xie ◽  
Haifeng Cheng ◽  
Zengyong Chu ◽  
Yongjiang Zhou ◽  
Gengping Tang ◽  
...  
Keyword(s):  
Surface Modification ◽  
Microwave Absorbing Properties ◽  
Magnetic Metal ◽  
Microwave Absorbing ◽  
Effect Of Surface

Microwave Absorbing Properties of Carbon Fibers Modified with BN/SiC Composite Coatings

2014 ◽  
Vol 29 (10) ◽  
pp. 1093 ◽  
Author(s):  
ZHOU Wei ◽  
XIAO Peng ◽  
LI Yang ◽  
LUO Heng ◽  
HONG Wen
Keyword(s):  
Carbon Fibers ◽  
Composite Coatings ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing

Synthesis and Microwave Absorbing Properties of PyC/BN Composite Powders

2013 ◽  
Vol 28 (5) ◽  
pp. 479-484 ◽  
Author(s):  
Wei ZHOU ◽  
Peng XIAO ◽  
Yang LI ◽  
Heng LUO ◽  
Liang ZHOU
Keyword(s):  
Composite Powders ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing
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