Preparation and characterization of chiral polyaniline/barium hexaferrite composite with enhanced microwave absorbing properties

2014 ◽  
Vol 593 ◽  
pp. 24-29 ◽  
Author(s):  
Fenfang Xu ◽  
Li Ma ◽  
Mengyu Gan ◽  
Jihai Tang ◽  
Zhitao Li ◽  
...  
Keyword(s):  
Barium Hexaferrite ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing

The Influence of Sintering Temperature and Mn-Ti Doped BaFe12O19 on the Microwave Absorbing Properties

2015 ◽  
Vol 754-755 ◽  
pp. 733-737
Author(s):  
M.N. Nasruddin ◽  
Tulus Ikhsan Nasution ◽  
M.S. Achmad ◽  
K. Candra ◽  
F.N. Lukman ◽  
...  
Keyword(s):  
Dopant Concentration ◽  
Sintering Temperature ◽  
Barium Hexaferrite ◽  
Solid State Reaction Method ◽  
Network Analyzer ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Microwave Absorbing Properties ◽  
Magnetizing Force ◽  
Microwave Absorbing

The effect of sintering temperature and Mn-Ti (x = 0.1 and 0.5 % mol) doped in Barium hexaferrite (BaFe12O19) on the microwave absorption properties have been investigated. The BaFe(12-2x)MnxTixO19samples were prepared by using a solid state reaction method from technical grade materials of BaCO3, Fe2O3, MnO2, and TiO2. The permagraph and vector network analyzer (VNA) measurement with frequency of 4 – 10 GHz were used to determine the magnetic properties and microwave absorbing properties, respectively. The magnetic induction and magnetizing force (B-H) curve analysis of BaFe(12-2x)MnxTixO19revealed that by increasing the Mn-Ti dopant concentrations, the remanence (Br) and BH(max) increases, meanwhile, the HCBvalue decreases for both 1100 and 1150oC. The frequency dependence of reflection loss (RL) measurement given anoptimum value of-26.15 dB at frequency of 9.18 GHz which obtained by x = 0.1% mol Mn-Ti (1100oC). The maximum absorption peak was achieved for 0.5 % mol Mn-Ti sample with ~98.3 % at 9.18 GHz. By controlling the sintering temperature and Mn-Ti dopant concentration, the RL and absorption behavior can be modified to desirable values and also indicates that higher Mn-Ti dopant concentration (0.5% mol) possess better absorbing characteristics. Furthermore, it was found that complex permitivitty and permeability values of BaFe12O19can be modified by controlling the Mn-Ti dopant concentration.

Electromagnetic and microwave absorbing properties of U-type barium hexaferrite/polyaniline-epoxy composites

2020 ◽  
Author(s):  
Vivek Pratap ◽  
Bhoopendra Singh ◽  
Sumit Kumar ◽  
A. K. Soni ◽  
Mohit Katiyar ◽  
...  
Keyword(s):  
Barium Hexaferrite ◽  
Epoxy Composites ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing

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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