Microwave absorption properties of polymer modified Ni-Zn ferrite nanoparticles

Kazuaki Shimba; Kiyotaka Furuta; Nobuyuki Morimoto; Nobuki Tezuka; Satoshi Sugimoto

doi:10.2320/matertrans.MBW201013

Microwave absorption properties of polymer modified Ni-Zn ferrite nanoparticles

Kazuaki Shimba, Kiyotaka Furuta, Nobuyuki Morimoto, Nobuki Tezuka, Satoshi Sugimoto

ENG - Materials Science

Tohoku University

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Polymer composites of magnetic particles are widely used as microwave absorbers. An effective method for obtaining thinner microwave absorbers for device design is increasing the volume fraction of magnetic nanoparticles by enhancing the permeability of composites. In this study, composites were prepared using Ni-Zn ferrite nanoparticles surface-modified with 4-META (4-methacryloylioxyethyl trimellitate anhydride) and cross-linked with PEG-4SH (pentaerythritol tetra-polyethylene glycol ether with four thiol-modified terminals). These composites have a high volume fraction of nanoparticles (up to 72 vol%) and permeability (μ_rmax= 5.9). In addition, the prepared composites showed good microwave absorption properties (R.L. < -20 dB) with a smaller matching thickness than conventional microwave absorber using spinel-type ferrite.

Original language	English
Pages (from-to)	740-745
Number of pages	6
Journal	Materials Transactions
Volume	52
Issue number	4
DOIs	https://doi.org/10.2320/matertrans.MBW201013
Publication status	Published - 2011 Apr

Keywords

Cross-linking
Magnetic nanoparticles
Microwave absorbers
Nickel-zinc ferrite
Surface modification

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10.2320/matertrans.MBW201013

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title = "Microwave absorption properties of polymer modified Ni-Zn ferrite nanoparticles",

abstract = "Polymer composites of magnetic particles are widely used as microwave absorbers. An effective method for obtaining thinner microwave absorbers for device design is increasing the volume fraction of magnetic nanoparticles by enhancing the permeability of composites. In this study, composites were prepared using Ni-Zn ferrite nanoparticles surface-modified with 4-META (4-methacryloylioxyethyl trimellitate anhydride) and cross-linked with PEG-4SH (pentaerythritol tetra-polyethylene glycol ether with four thiol-modified terminals). These composites have a high volume fraction of nanoparticles (up to 72 vol%) and permeability (μrmax= 5.9). In addition, the prepared composites showed good microwave absorption properties (R.L. < -20 dB) with a smaller matching thickness than conventional microwave absorber using spinel-type ferrite.",

keywords = "Cross-linking, Magnetic nanoparticles, Microwave absorbers, Nickel-zinc ferrite, Surface modification",

author = "Kazuaki Shimba and Kiyotaka Furuta and Nobuyuki Morimoto and Nobuki Tezuka and Satoshi Sugimoto",

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T1 - Microwave absorption properties of polymer modified Ni-Zn ferrite nanoparticles

AU - Shimba, Kazuaki

AU - Furuta, Kiyotaka

AU - Morimoto, Nobuyuki

AU - Tezuka, Nobuki

AU - Sugimoto, Satoshi

PY - 2011/4

Y1 - 2011/4

N2 - Polymer composites of magnetic particles are widely used as microwave absorbers. An effective method for obtaining thinner microwave absorbers for device design is increasing the volume fraction of magnetic nanoparticles by enhancing the permeability of composites. In this study, composites were prepared using Ni-Zn ferrite nanoparticles surface-modified with 4-META (4-methacryloylioxyethyl trimellitate anhydride) and cross-linked with PEG-4SH (pentaerythritol tetra-polyethylene glycol ether with four thiol-modified terminals). These composites have a high volume fraction of nanoparticles (up to 72 vol%) and permeability (μrmax= 5.9). In addition, the prepared composites showed good microwave absorption properties (R.L. < -20 dB) with a smaller matching thickness than conventional microwave absorber using spinel-type ferrite.

AB - Polymer composites of magnetic particles are widely used as microwave absorbers. An effective method for obtaining thinner microwave absorbers for device design is increasing the volume fraction of magnetic nanoparticles by enhancing the permeability of composites. In this study, composites were prepared using Ni-Zn ferrite nanoparticles surface-modified with 4-META (4-methacryloylioxyethyl trimellitate anhydride) and cross-linked with PEG-4SH (pentaerythritol tetra-polyethylene glycol ether with four thiol-modified terminals). These composites have a high volume fraction of nanoparticles (up to 72 vol%) and permeability (μrmax= 5.9). In addition, the prepared composites showed good microwave absorption properties (R.L. < -20 dB) with a smaller matching thickness than conventional microwave absorber using spinel-type ferrite.

KW - Cross-linking

KW - Magnetic nanoparticles

KW - Microwave absorbers

KW - Nickel-zinc ferrite

KW - Surface modification

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JO - Materials Transactions

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Microwave absorption properties of polymer modified Ni-Zn ferrite nanoparticles

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Keywords

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