High-permittivity and low-dielectric-loss polymer composites based on TiO2-nanorod functionalized carbon nanotubes

2012 ◽  
Author(s):  
Chao Wu ◽  
Xingyi Huang ◽  
Libing Lv ◽  
Gan Chen ◽  
Jinhong Yu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Loss ◽  
Polymer Composites ◽  
Functionalized Carbon Nanotubes ◽  
High Permittivity ◽  
Low Dielectric

TiO2-nanorod decorated carbon nanotubes for high-permittivity and low-dielectric-loss polystyrene composites

2012 ◽  
Vol 72 (4) ◽  
pp. 521-527 ◽  
Author(s):  
Chao Wu ◽  
Xingyi Huang ◽  
Xinfeng Wu ◽  
Jinhong Yu ◽  
Liyuan Xie ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Loss ◽  
High Permittivity ◽  
Tio2 Nanorod ◽  
Low Dielectric

High permittivity, low dielectric loss, and high electrostatic potential barrier in Ca2Cu2Ti4O12 ceramics

2012 ◽  
Vol 76 ◽  
pp. 40-42 ◽  
Author(s):  
Jutapol Jumpatam ◽  
Prasit Thongbai ◽  
Boonsong Kongsook ◽  
Teerapon Yamwong ◽  
Santi Maensiri
Keyword(s):  
Dielectric Loss ◽  
Potential Barrier ◽  
Electrostatic Potential ◽  
High Permittivity ◽  
Low Dielectric

Microwave Absorbing Properties of Fe-Filled Carbon Nanotubes/Epoxy Composite in 2-18GHz

2008 ◽  
Author(s):  
Xuchun Gui ◽  
Kunlin Wang ◽  
Jinquan Wei ◽  
Ruitao Lv ◽  
Dehai Wu
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Loss ◽  
Microwave Absorption ◽  
Electromagnetic Interference ◽  
Magnetic Loss ◽  
Magnetic Contribution ◽  
High Permittivity ◽  
Ferromagnetic Metals ◽  
Potential Applications ◽  
Iron Nanowires

Carbon nanotubes (CNTs) filled with ferromagnetic metals have potential applications of microwave absorption and electromagnetic interference shielding due to their high aspect-ratio of nanostructures that promises low percolation threshold and their inner cavities which could incorporate magnetic materials to improve the permeability and magnetic loss of composites. It has been reported that CNTs have high permittivity [1, 2]. And it could be used as dielectric microwave absorbers due to their high permittivity [3, 4]. Excellent microwave absorption should have better electromagnetic match of magnetic loss and dielectric loss. The microwave absorption could be significantly improved by matching the dielectric and magnetic contribution from respective components (e.g. CNTs and Fe) [5]. For CNTs, only dielectric loss contributes to the energy loss of microwave, while for ferromagnetic nanowires, the effect of magnetic loss becomes dominant over the dielectric loss. Either only the dielectric loss or magnetic loss may induce weak microwave absorption due to the imbalance of the electromagnetic match. Here we directly fabricated the microwave absorber by as-grown Fe-filled CNTs, which have the dielectric properties of CNTs and magnetic properties of the filled iron nanowires.

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