Effects of titanate coupling agent on the dielectric properties of NiZn ferrite powders–epoxy resin coatings |
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| Authors: | Wei-Sheng Chen Yu-Lun Chang Hsing-I Hsiang Fu-Chi Hsu Fu-Su Yen |
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| Affiliation: | aParticulate Materials Research Center, Department of Resources Engineering, National Cheng Kung University, 70101 Tainan, Taiwan, ROC;bSustainable Environment Research Center, National Cheng Kung University, 70101 Tainan, Taiwan, ROC |
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| Abstract: | During ferrite powder–polymer resin slurry preparation, the ferrite particles tend to hold together, forming agglomerates, which lead to the formation of micro-structural defects in the ferrite powder–polymer coatings. These defects affect the quality of magnetic devices. In this study, the titanate coupling agent effects on the NiZn ferrites powder dispersion in an epoxy resin and solvent system and the electromagnetic properties of NiZn ferrite powders–epoxy resin composite coatings are investigated. It was observed that the dispersion of NiZn ferrite powders and the affinity of NiZn ferrites and epoxy resin can be substantially enhanced by coating a titanate coupling agent onto the ferrite powder surfaces. This coating promotes mixing homogeneity and increases the dielectric constants at low frequencies (below 100 Hz) due to the increase in phase boundary between the NiZn ferrite powders and epoxy resin. |
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| Keywords: | C Dielectric properties NiZn ferrites Epoxy resin Titanate coupling agent |
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