Characterization of electromagnetic properties of polymeric composite materials with free space method

Seo, Il Sung; Chin, Woo Seok; Lee, Dai Gil

doi:10.1016/j.compstruct.2004.04.076

Cited by 101 publications

(41 citation statements)

References 9 publications

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“…These methods include parallel plate capacitor technique [1], resonator/oscillator technique [2], transmission line technique [3][4][5][6], and free-space technique [7][8][9][10][11]. Although each technique has its own features and constraints, among these, the free-space technique appears to be more applicable for in-situ measurements.…”

Section: Introductionmentioning

confidence: 99%

A methodology for determining complex permittivity of construction materials based on transmission-only coherent, wide-bandwidth free-space measurements

Büyüköztürk

Ortega

2006

Cement and Concrete Composites

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Section: Introductionmentioning

confidence: 99%

A methodology for determining complex permittivity of construction materials based on transmission-only coherent, wide-bandwidth free-space measurements

Büyüköztürk

Ortega

2006

Cement and Concrete Composites

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“…These materials exhibit ɛ r ≤ 100, which limits their use in the industry of dielectric capacitors [13][14][15]. During World War II, the need of high dielectric constant materials increased in capacitor applications [16,17]. Ferroelectric materials exhibit nonlinear dielectric polarization against an external E due to the presence of permanent dipoles [18].…”

Section: Electrical Propertiesmentioning

confidence: 99%

High-k Polymer Nanocomposites for Energy Storage Applications

Mahmood¹,

Akhtar²,

Mahmood³

2017

Properties and Applications of Polymer Dielectrics

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High dielectric (high-k) polymer nanocomposites that can electrostatically store energy are widely used in electronics and electric power systems due to their high breakdown strengths (E b ), durability, and ability to configure in various shapes. However, these nanocomposites suffer from a limited working temperature regime, thus limiting their extreme applications, such as hybrid and electric vehicles, aerospace power electronics, and deep ground fuel exploration. Furthermore, the E b and the electric displacement (D) of polymer nanocomposites must be simultaneously enhanced for high-density capacitor applications, which prove to be difficult to modify concurrently. This chapter thoroughly reviews (investigates) the recent developments in the high-k polymer nanocomposites synthesis, characterization, and energy storage applications. Consequently, the aim of this chapter is to provide an overview of the novel developmental strategies in order to develop high-dielectric nanocomposites perovskite ceramics that can be incorporated in high-energy-density (HED) applications.

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“…But densities of the magnetic materials are generally high and absorbing bandwidths for magnetic absorbers are usually narrow. On the other hand, dielectric materials are light weight, but do not match up to the absorptivity of magnetic absorbers (Seo et al 2004;Park et al 2006;Oh et al 2004). These two types of materials have different advantages and disadvantages when they are applied as absorbers.…”

Section: Introductionmentioning

confidence: 99%

Nickel nanoparticles embedded in carbon foam for improving electromagnetic shielding effectiveness

2014

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To improve electromagnetic shielding effectiveness of light weight carbon foam (CF), magnetic nanoparticles were embedded in it during processing. The CF was developed from the coal tar pitch and mixture of coal tar pitch-Nickel (Ni) nanoparticles by sacrificial template technique and heat treated to up 1,000°C. To ascertain the effect of Ni nanoparticles embedded in CF, it was characterized by scanning electron microscopy, X-ray diffraction, Raman spectroscopy, vector network analyzer and vibration sample magnetometer. It is observed that Ni nanoparticles embedded in the carbon material play an important role for improving the structure and electrical conductivity of CF-Ni by catalytic carbonization. The structural investigation suggests that the Ni nanoparticles embedded in the carbon material in bulk as well on the surface of CF. The CF demonstrates excellent shielding response in the frequency range 8.2-12.4 GHz in which total shielding effectiveness (SE) dominated by absorption losses. The total SE is -25 and -61 dB of CF and CF-Ni, it is governed by absorption losses -48.5 dB in CF-Ni. This increase is due to the increase in dielectric and magnetic losses of ferromagnetic Ni nanoparticles with high surface area. Thus, light weight CF embedded with small amount of magnetic nanoparticles can be useful material for stealth technology.

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Characterization of electromagnetic properties of polymeric composite materials with free space method

Cited by 101 publications

References 9 publications

A methodology for determining complex permittivity of construction materials based on transmission-only coherent, wide-bandwidth free-space measurements

A methodology for determining complex permittivity of construction materials based on transmission-only coherent, wide-bandwidth free-space measurements

High-k Polymer Nanocomposites for Energy Storage Applications

Nickel nanoparticles embedded in carbon foam for improving electromagnetic shielding effectiveness

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