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Magneto-Dielectric Effects in Polyurethane Sponge Modified with Carbonyl Iron for Applications in Low-Cost Magnetic Sensors.

Authors :
Bica, Ioan
Iacobescu, Gabriela-Eugenia
Source :
Polymers (20734360). May2022, Vol. 14 Issue 10, p2062-2062. 19p.
Publication Year :
2022

Abstract

In this study, magnetizable polyurethane sponges (MSs) were obtained from commercial absorbent polyurethane sponges (PSs) doped with carbonyl iron microparticles (CIPs). Based on MSs, we manufactured cylindrical capacitors (CCs). The CCs were subjected to both a magnetic field and an alternating electric field, with a frequency of f = 1   kHz . Using an RLC bridge, we measured the series electric capacitance, C s , and the tangent of the loss angle, D s . From the functions C s = C s (δ) C C s and D s = D s (δ) C C s , we extracted the components of the complex dielectric permittivity. It was found that the CIPs embedded in the MS matrix aggregated, leading to magneto-dielectric effects such as the enhancement of the complex dielectric permittivity components when applying the magnetic field as a principal effect and the enhancement of the electric capacitance and time constant of the capacitors as a secondary effect. The obtained results represent landmarks in the realization of low-cost magnetic field sensors, deformation and mechanical stress transducers in the robotics industry, etc. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20734360
Volume :
14
Issue :
10
Database :
Academic Search Index
Journal :
Polymers (20734360)
Publication Type :
Academic Journal
Accession number :
157244192
Full Text :
https://doi.org/10.3390/polym14102062