Effects of Coating Characteristics of One-Step Aerosol Synthesized–Silica-Coated FeNi Nanostructured Particles on Powder Core Properties for Electronic Machine Development

Eka Lutfi Septiani

Okuda Nobuhiro

Matsumoto Hiroyuki

Cao Le Anh Kiet

Hirano Tomoyuki

Ogi Takashi

ACS Applied Nano Materials

Nanostructured particles with a core–shell structure have been highlighted in recent developments in various fields including electronic machinery applications. Applying nonagglomerated nanoscaled-silica-coated soft-magnetic particles into powder core inductors (PCIs), power converters in electronic machines, promises efficiency improvement. In this study, nanostructuring silica-coated FeNi (FeNi@SiO2) particles was conducted via an aerosol method by introducing the SiO2 (0.4 nm) from hexamethyldisiloxane to the FeNi particles. The effect of varying the supplied amounts of FeNi (as the core) and SiO2 (as the shell) materials on the core–shell structure and electrical properties of a powder core was investigated. The results revealed that controlling the FeNi core number (NFeNi) played a critical role in determining the coating characteristics. Applying a higher NFeNi yielded superior coating properties, characterized by decreased shell inhomogeneity and pristine silica nanoparticles due to heterogeneous nucleation. Notably, a higher level of shell inhomogeneity and the presence of silica nanoparticles caused increased eddy current loss and decreased the breakdown voltage in the powder core. This is the first study to elucidate the correlation between the structure of FeNi@SiO2 particles and the electrical properties of a powder core. This study provides insights into the factors influencing nanoscaled-coating characteristics and powder core properties, which are crucial for advancing electronic components.

Shell Inhomogeneity

Core-shell Nanostructure

Soft Magnetic

Eddy Current Loss

Breakdown Voltage

eng

American Chemical Society

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsanm.4c01399

This is not the published version. Please cite only the published version.

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[DOI] https://doi.org/10.1021/acsanm.4c01399 isVersionOf

日本学術振興会

Japan Society for the Promotion of Science

[Crossref Funder] https://doi.org/10.13039/501100001691

高次構造ポーラス微粒子創製のプロセスサイエンスの構築と物質移動特性の解明

Development of process science for the creation of porous particles with highly-ordered structure and elucidation of mass transfer characteristics

23H01745