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Magnetochemistry, Volume 10, Issue 7 (July 2024) – 3 articles

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29 pages, 10787 KiB  
Review
Current Application of Magnetic Materials in the Dental Field
by Yilin Yu and Xiaolei Li
Magnetochemistry 2024, 10(7), 46; https://doi.org/10.3390/magnetochemistry10070046 (registering DOI) - 29 Jun 2024
Viewed by 92
Abstract
Integrating magnetic materials into dentistry has emerged as a promising advance for addressing diverse dental conditions. Magnetic particles comprising a magnetic core encapsulated within a biocompatible coating offer precise manipulation through external magnetic fields, rendering them invaluable in targeted drug delivery, magnetic resonance [...] Read more.
Integrating magnetic materials into dentistry has emerged as a promising advance for addressing diverse dental conditions. Magnetic particles comprising a magnetic core encapsulated within a biocompatible coating offer precise manipulation through external magnetic fields, rendering them invaluable in targeted drug delivery, magnetic resonance imaging, hyperthermia therapy, and diagnostic assays. Their tunable properties allow optimization for specific applications, enhancing therapeutic efficacy while minimizing off-target effects. Additionally, pre-adjust magnets showcase exceptional magnetic field strength and energy density. Their utilization in dental implants and orthodontic treatments facilitates tissue engineering and tooth movement, augmenting clinical outcomes and patient comfort. This review synthesizes current research directions and clinical applications of magnetic materials in dentistry, offering insights into their potential to transform dental healthcare and enhance patient well-being. Full article
(This article belongs to the Special Issue Application of Magnetic Materials on Dental Diseases)
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17 pages, 5037 KiB  
Article
Enhancing Magnetic Performance of FeNi50 Soft Magnetic Composites with Double-Layer Insulating Coating for High-Frequency Applications
by Weizhong Zheng, Zixin Zhou, Rongyu Zou and Minghui Yang
Magnetochemistry 2024, 10(7), 45; https://doi.org/10.3390/magnetochemistry10070045 (registering DOI) - 29 Jun 2024
Viewed by 107
Abstract
Soft magnetic composites (SMCs) such as FeNi50 are indispensable in modern electronics due to their high magnetic permeability and low-loss characteristics, meeting the requirements for miniaturization and high-frequency operation. However, the integration of organic materials, initially aimed at reducing the total losses, [...] Read more.
Soft magnetic composites (SMCs) such as FeNi50 are indispensable in modern electronics due to their high magnetic permeability and low-loss characteristics, meeting the requirements for miniaturization and high-frequency operation. However, the integration of organic materials, initially aimed at reducing the total losses, presents challenges by introducing thermal stability issues at high frequencies. To overcome this obstacle, we propose a double-layer insulating coating method, applying a complete inorganic/organic composite insulation layer to the surface of iron–nickel magnetic powder. The double-layer insulating coating insulation method aims to reduce the total losses, particularly the eddy-current losses prevalent in SMCs. Additionally, the double-layer insulating coating method helps alleviate the thermal stability issues associated with organic materials at high frequencies, ultimately enhancing the magnetic properties of SMCs. We systematically investigated the influence of different resin types on the microstructure of the double-layer insulating coating, accompanied by a comprehensive comparison of the magnetic properties of the resulting samples. The experimental findings demonstrate a significant reduction in the eddy-current losses through the double-layer insulating coating method, with the total losses decreasing by over 95% compared to the initial FeNi50 magnetic powder composite (MPC) materials. Notably, the sodium silicate and silicone resins exhibited superior performances as double-layer insulating coatings, achieving total loss reductions of 1350 W/kg and 1492 W/kg, respectively. In conclusion, the double-layer insulating coating method addresses the challenges related to the total losses and thermal stability in SMCs, offering a promising approach to improve their performance in various electrical and electronic applications. Full article
17 pages, 4570 KiB  
Article
One-Step Preparation Method and Rapid Detection Implementation Scheme for Simple Magnetic Tagging Materials
by Xianxiao Song, Weiting Ma, Ping Song and Hongying Wang
Magnetochemistry 2024, 10(7), 44; https://doi.org/10.3390/magnetochemistry10070044 - 22 Jun 2024
Viewed by 383
Abstract
With the widespread application of tagging materials, existing chemical tagging materials exhibit limitations in stability and detection under field conditions. This study introduces a novel magnetic detection scheme. Hydrophilic material-modified Fe3O4 nanoparticles (COOH-PEG@Fe3O4 NPs) were synthesized using [...] Read more.
With the widespread application of tagging materials, existing chemical tagging materials exhibit limitations in stability and detection under field conditions. This study introduces a novel magnetic detection scheme. Hydrophilic material-modified Fe3O4 nanoparticles (COOH-PEG@Fe3O4 NPs) were synthesized using the co-precipitation technique. The content of Fe3O4 nanoparticles in the magnetic tagging liquid can reach up to 10 wt% and remain stable in an aqueous phase system for seven days. This research details the preparation process, the characterization methods (IR, 1HNMR, EDX, XRD, SEM, TEM, VSM, DLS), and the performance effects of the materials in magnetic tagging. Experimental results indicate that COOH-PEG@Fe3O4 NPs exhibit high remanence intensity (Br = 1.75 emu/g) and considerable stability, making it possible to quickly detect tagged liquids in the field using portable flux meters and optical pump magnetometers. This study provides new insights into the design and application of magnetic tagging materials, making it particularly suitable for long-term tagging and convenient detection in field scenarios. Full article
(This article belongs to the Section Applications of Magnetism and Magnetic Materials)
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