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Magnetochemistry
Special Issues
Ferrofluids: Electromagnetic Properties and Applications
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Ferrofluids: Electromagnetic Properties and Applications

A special issue of Magnetochemistry (ISSN 2312-7481).

Deadline for manuscript submissions: 31 December 2025 | Viewed by 1417

Special Issue Editor

Dr. Catalin Nicolae Marin

E-Mail Website
Guest Editor
Faculty of Physics, West University of Timisoara, 300223 Timisoara, Romania
Interests: electromagnetic properties of nanoparticles; ferrofluids; ferromagnetic resonance; dielectric permittivity; magnetic permeability; electromagnetic absorbers; magnetic hyperthermia; magnetic materials; dielectric materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Ferrofluids, also known as magnetic fluids, were invented in the early 1960s by Steve Papell, an engineer at the Lewis Research Center, to be used for rockets in the form of magnetic fuel, which can be magnetically directed from the storage tank to the engine in the absence of gravity. Since then, ferrofluids have been studied both for their application purposes and fundamental research. Because ferrofluids are relatively easy to obtain, with different carrier liquids, different surfactants, and different magnetic particles at different concentrations, they have also been a study material for understanding the electrical and magnetic properties of magnetic nanoparticle systems.

This Special Issue aims to publish articles on both the theory and electromagnetic applications of ferrofluids and of the composites or structures that can be realized using ferrofluids.

Dr. Catalin Nicolae Marin
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetic fluids
  • ferrofluids
  • static and dynamic magnetic measurements
  • magnetic hyperthermia
  • stability of magnetic colloids
  • structures and assembling of magnetic nanoparticles
  • technical and biomedical applications of ferrofluids and of other nanoparticle systems
  • magneto-optical phenomena in ferrofluids
  • magneto-dielectric effects in magnetic colloids and composites
  • use of electrical and magnetic measurements to characterize materials
  • ferrofluid-based nanostructured materials
  • ferrofluid structures and devices
  • magnetic drug delivery
  • magnetic robots with ferrofluids (ferrofluid robots)
  • magnetic resonance imaging contrast agents

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Published Papers (2 papers)

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Research

19 pages, 13794 KiB  
Article
Experimental Study on Thermal Conductivity of Hybrid Magnetic Fluids Under External Magnetic Field
by Licong Jin, Jixian Yang, Qian Li, Xin Tian and Decai Li
Magnetochemistry 2025, 11(4), 30; https://doi.org/10.3390/magnetochemistry11040030 - 3 Apr 2025
Viewed by 301
Abstract
In the paper, a hybrid magnetic fluid is prepared by adding carbon nanotubes to pure ferrofluid to improve its thermal conductivity. Furthermore, an electromagnet is used as magnetic source equipment, and the magnetic field strength in the air gap of the electromagnet is [...] Read more.
In the paper, a hybrid magnetic fluid is prepared by adding carbon nanotubes to pure ferrofluid to improve its thermal conductivity. Furthermore, an electromagnet is used as magnetic source equipment, and the magnetic field strength in the air gap of the electromagnet is analyzed in theory, simulations, and experiments. A thermal conductivity measurement apparatus for magnetic fluid is established according to the transient hot-wire method. The effects of weight fraction and the length of carbon nanotubes, the external magnetic field strength, and the magnetic field duration time on the thermal conductivity of hybrid magnetic fluid are experimentally investigated. The results show that the thermal conductivity of the hybrid magnetic fluid is significantly improved by adding long carbon nanotubes (10–30 μm), and the thermal conductivity could be enhanced by 23.39% when its weight fraction is 1%. The magnetic field strength (41, 81, 122, 162 mT) and magnetic field duration time have little influence on the thermal conductivity of the hybrid magnetic fluid. The thermal conductivity of the hybrid magnetic fluid has good stability. Full article
(This article belongs to the Special Issue Ferrofluids: Electromagnetic Properties and Applications)
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13 pages, 3178 KiB  
Article
Failure Mechanisms of Ester-Based Magnetic Fluid Seals at High Speeds: Thermal Dissipation and Fluid Loss
by Jixian Yang, Decai Li and Licong Jin
Magnetochemistry 2025, 11(2), 18; https://doi.org/10.3390/magnetochemistry11020018 - 18 Feb 2025
Viewed by 595
Abstract
Magnetic fluid seals are well known for their zero-leakage performance but are limited at high rotational speeds due to heat generation and fluid loss. This study experimentally investigates the failure mechanisms of ester-based magnetic fluid seals at high speeds, specifically focusing on thermal [...] Read more.
Magnetic fluid seals are well known for their zero-leakage performance but are limited at high rotational speeds due to heat generation and fluid loss. This study experimentally investigates the failure mechanisms of ester-based magnetic fluid seals at high speeds, specifically focusing on thermal dissipation and fluid loss. A custom-designed high-speed rotary seal test platform was developed, and experimental studies were conducted to evaluate sealing performance. Our results showed significant temperature increases and fluid loss at higher rotational speeds, with a noticeable fluid ejection phenomenon occurring at approximately 13.7 m/s, and the sealing gap temperature reached 92 °C at 9000 rpm under uncooled conditions. This study experimentally verified that the main failure mechanisms of magnetic fluid seals at high speeds are centrifugal force and thermal dissipation, and proposed future design directions. This research provides key insights into the failure of high-speed magnetic fluid seals and offers a potential approach for improved high-speed sealing performance. Full article
(This article belongs to the Special Issue Ferrofluids: Electromagnetic Properties and Applications)
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