Magnetic and dielectric losses of a nanocomposites polymer matrix reinforced with ferromagnetic powders

Scarlatache, Vlad Andrei; Olariu, Marius; Ursache, Silviu; Ciobanu, Romeo Cristian; Pasquale, M.

doi:10.1109/icepe.2012.6463940

Cited by 4 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The permeability and permittivity values of these MNPs were not measured. Still, similar ones appeared in the literature [25,26] presenting values of the relative permeability µ MNPs at RF between 1.5 and 2 and relative electric permittivity ε MNPs between 6 and 8. The gold NPs were a commercial colloid of spherical particles with a diameter of 5.6 nm.…”

Section: Nanoparticles For Testingsupporting

confidence: 85%

New Perspective on Planar Inductive Sensors: Radio-Frequency Refractometry for Highly Sensitive Quantification of Magnetic Nanoparticles

Marqués-Fernández

Salvador

Martínez-García

et al. 2023

Sensors

View full text Add to dashboard Cite

We demonstrate how resonant planar coils may be used as sensors to detect and quantify magnetic nanoparticles reliably. A coil’s resonant frequency depends on the adjacent materials’ magnetic permeability and electric permittivity. A small number of nanoparticles dispersed on a supporting matrix on top of a planar coil circuit may thus be quantified. Such nanoparticle detection has application detection to create new devices to assess biomedicine, food quality assurance, and environmental control challenges. We developed a mathematical model for the inductive sensor response at radio frequencies to obtain the nanoparticles’ mass from the self-resonance frequency of the coil. In the model, the calibration parameters only depend on the refraction index of the material around the coil, not on the separate magnetic permeability and electric permittivity. The model compares favourably with three-dimensional electromagnetic simulations and independent experimental measurements. The sensor can be scaled and automated in portable devices to measure small quantities of nanoparticles at a low cost. The resonant sensor combined with the mathematical model is a significant improvement over simple inductive sensors, which operate at smaller frequencies and do not have the required sensitivity, and oscillator-based inductive sensors, which focus on just magnetic permeability.

show abstract

Section: Nanoparticles For Testingsupporting

confidence: 85%

New Perspective on Planar Inductive Sensors: Radio-Frequency Refractometry for Highly Sensitive Quantification of Magnetic Nanoparticles

Marqués-Fernández

Salvador

Martínez-García

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…Among others, ferrite nanoinclusions have been embedded in polymer matrix. Although the available studies are scarce and mostly concern physical and mechanical properties [13,14], it has been shown that a fine distribution of the magnetic filler in a polymer matrix influences significantly the conductivity, dielectric [13,15,16,17,18] and magnetic properties [19,20,21] of the systems, via the effective volume fraction of the nanoparticles. In the electronics industry, epoxy resins being excellent electrical insulators are the primary resin used in integrated circuits, transistors, hybrid circuits and printed circuit boards protecting electrical components from short circuiting, dust and moisture [22,23].…”

Section: Introductionmentioning

confidence: 99%

Magneto-Dielectric Behaviour of M-Type Hexaferrite/Polymer Nanocomposites

et al. 2018

View full text Add to dashboard Cite

In the present study two sets of nanocomposites consisting of an epoxy resin and BaFe12O19 or SrFe12O19 nanoparticles were successfully developed and characterized morphologically and structurally via scanning electron microscopy and X-ray diffraction spectra. The dielectric response of the nanocomposites was investigated by means of broadband dielectric spectroscopy and their magnetic properties were derived from magnetization tests. Experimental data imply that the incorporation of the ceramic nanoparticles enhances significantly the dielectric properties of the examined systems and their ability to store electrical energy. Dielectric spectra of all systems revealed the presence of three distinct relaxation mechanisms, which are attributed both to the polymer matrix and the nanoinclusions: Interfacial polarization, glass to rubber transition of the polymer matrix and the re-orientation of small polar side groups of the polymer chain. The magnetic measurements confirmed the ferromagnetic nature of the nanocomposites. The induced magnetic properties increase with the inclusion of hexaferrite nanoparticles. The nanocomposites with SrFe12O19 nanoparticles exhibit higher values of coercive field, magnetization, magnetic saturation and remanence magnetization. A magnetic transition was detected in the ZFC/FC curves in the case of the BaFe12O19/epoxy nanocomposites.

show abstract

Magnetic nanoparticles – polymer matrix nanodielectrics: Manufacturing, characterization and functionality

Sanida

Stavropoulos

Speliotis

et al. 2018

Materials Today: Proceedings

View full text Add to dashboard Cite

Magnetic and dielectric losses of a nanocomposites polymer matrix reinforced with ferromagnetic powders

Cited by 4 publications

References 2 publications

New Perspective on Planar Inductive Sensors: Radio-Frequency Refractometry for Highly Sensitive Quantification of Magnetic Nanoparticles

New Perspective on Planar Inductive Sensors: Radio-Frequency Refractometry for Highly Sensitive Quantification of Magnetic Nanoparticles

Magneto-Dielectric Behaviour of M-Type Hexaferrite/Polymer Nanocomposites

Magnetic nanoparticles – polymer matrix nanodielectrics: Manufacturing, characterization and functionality

Contact Info

Product

Resources

About