Version 1
: Received: 29 June 2024 / Approved: 2 July 2024 / Online: 2 July 2024 (05:10:09 CEST)
How to cite:
Bunoiu, O. M.; Bica, I.; Anitas, E. M.; Chirigiu, L.-M.-E. Magnetodielectric and Rheological Effects in Suspensions Based on Lard, Gelatin and Carbonyl Iron Microparticles. Preprints2024, 2024070179. https://doi.org/10.20944/preprints202407.0179.v1
Bunoiu, O. M.; Bica, I.; Anitas, E. M.; Chirigiu, L.-M.-E. Magnetodielectric and Rheological Effects in Suspensions Based on Lard, Gelatin and Carbonyl Iron Microparticles. Preprints 2024, 2024070179. https://doi.org/10.20944/preprints202407.0179.v1
Bunoiu, O. M.; Bica, I.; Anitas, E. M.; Chirigiu, L.-M.-E. Magnetodielectric and Rheological Effects in Suspensions Based on Lard, Gelatin and Carbonyl Iron Microparticles. Preprints2024, 2024070179. https://doi.org/10.20944/preprints202407.0179.v1
APA Style
Bunoiu, O. M., Bica, I., Anitas, E. M., & Chirigiu, L. M. E. (2024). Magnetodielectric and Rheological Effects in Suspensions Based on Lard, Gelatin and Carbonyl Iron Microparticles. Preprints. https://doi.org/10.20944/preprints202407.0179.v1
Chicago/Turabian Style
Bunoiu, O. M., Eugen Mircea Anitas and Larisa-Marina-Elisabeth Chirigiu. 2024 "Magnetodielectric and Rheological Effects in Suspensions Based on Lard, Gelatin and Carbonyl Iron Microparticles" Preprints. https://doi.org/10.20944/preprints202407.0179.v1
Abstract
This study aims to develop low-cost, eco-friendly and circular economy-compliant composite materials by creating three types of magnetorheological suspensions (MRSs) utilizing lard, carbonyl iron (CI) microparticles, and varying quantities of gelatin particles (GP). These MRSs serve as dielectric materials in cylindrical cells used to fabricate electric capacitors. The equivalent electrical capacitance (C) of these capacitors is measured under different magnetic flux densities (B≤160 mT) superimposed on a medium-frequency electric field (f = 1 kHz) over a period of 120 seconds. The results indicate that at high values of B, by increasing the GP content to 20 vol.% decreases the capacitance C up to about one order of magnitude compared to MRS without GP. From the measured data, the average values of capacitance Cm are derived, enabling the calculation of relative dielectric permittivities (ϵr′) and the dynamic viscosities (η) of the MRSs. It is demonstrated that ϵr′ and η can be adjusted by modifying the MRS composition and fine-tuned through the magnetic flux density B. A theoretical model based on the theory of dipolar approximations is used to show that ϵr′, η and the magnetodielectric effect can be coarsely adjusted through the composition of MRSs and finely adjusted through the values B of the magnetic flux density. The ability to fine-tune these properties highlights the versatility of these materials, making them suitable for applications in various industries, including electronics, automotive and aerospace.
Keywords
lard; gelatine; carbonyl iron microparticles; viscosity; relative dielectric permittivity; dielectric loss factor; magnetodielectric effect
Subject
Chemistry and Materials Science, Ceramics and Composites
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
