Alumina nano-particles, carbon nanotubes, composite material, microwave characterization, nanotechnology, percolation, permittivity measurements
Electrical and Computer Engineering | Engineering
Electrical properties of nano-composite materials are extracted to investigate the possibility to engineer novel material for microwave applications. A measurement setup is developed to characterize material in a powder form. The developed measurement technique is applied on nano-particles of alumina, carbon nanotubes (CNTs), and composite mixture of carbon nanotubes and alumina. The effect of packing density on dielectric constant and loss tangent is thoroughly characterized experimentally. The obtained results show that the real part of effective permittivity may be considerably enhanced by increasing the percentage of conducting nano-particles. In addition, it is possible to decrease the loss in a material by mixing low-loss dielectric nano-particles powder in a lossy material.
E. Decrossas, M. A. El Sabbagh, S. M. El-Ghazaly, and V. F. Hanna, "Engineered Carbon-Nanotubes-Based Composite Material for RF Applications," Ieee Transactions on Electromagnetic Compatibility, vol. 54, pp. 52-59, Feb 2012.