期刊
MATERIALS TRANSACTIONS
卷 52, 期 4, 页码 740-745出版社
JAPAN INST METALS
DOI: 10.2320/matertrans.MBW201013
关键词
magnetic nanoparticles; nickel-zinc ferrite; surface modification; cross-linking; microwave absorbers
资金
- Grants-in-Aid for Scientific Research [22680039] Funding Source: KAKEN
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 (mu '' r(max)= 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. [doi:10.2320/matertrans.MBW201013]
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