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http://dx.doi.org/10.4313/JKEM.2019.32.1.25

Effect of Dispersant and Silane on Dispersion of Magnetic Powder Paste  

Lee, Chang Hyun (Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Shin, Hyo Soon (Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Yeo, Dong Hun (Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.32, no.1, 2019 , pp. 25-29 More about this Journal
Abstract
Various process technologies for manufacturing power inductors are under development. The core goal is to increase the mixing ratio of the soft magnetic powder in the epoxy, and to uniformly disperse it in a molding-type power inductor, manufactured by the injection molding method. In this study, we investigated the effect of dispersant and silane on the dispersion of soft magnetic metal powders in epoxy. We added 0.6 wt% of dispersant and 2.0 wt% of silane, and an excellent dispersibility resulted. Under the conditions of 0.3 wt% of dispersant and 0.5 wt% of silane, we added both dispersant and silane together to observe the effect of their interaction on dispersibility. Similarly, the addition of 0.3 wt% of dispersant and 0.1 wt% of silane resulted in a sharp increase in viscosity, considered to be due to the interaction of the dispersant and silane. The addition of 0.1 wt% of dispersant with 0.5 wt% of silane resulted in a sharp rise in viscosity, and sedimentation-height decreased sharply due to the dispersion optimization.
Keywords
Inductor; Magnetic powder; Epoxy; Silane; Dispersion;
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