Preparation and characterization of 5 wt.% epoxy resin bonded magnet NdFeB for micro generator application

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Abstract

Bonded magnet NdFeBwas made by mixing aNdFeBpowder (MQP -A) with a liquid epoxy resin (ER). The composition of the sample consisted of 95 wt.%. NdFeB powder and 5 wt.%ER. This mixture is then pressed with pressure about 1.5 ton/cm2 and it was obtaineda pellet sample with size 40 x 18 x 6 mm. The pellet samples were cured by using drying oven at 80°C for 2 hours and then the surface for all samples were coated by using silver paint and dried at room temperature for 6 hours. Magnetic properties were characterized by using Permagraph Magnet Physik Germany. The magnetic properties results show that, the 5 wt.% epoxy resin bonded magnet NdFeB has Flux density = 1, 500 Gauss, Remanence Br = 5.40 kGauss, Coercivity Hc = 7.86 kOe and Energy product (BH) max = 5.31 MGOe.The purpose of this research is to make bonded magnet NdFeB using 5 % ER and know the extent to which can be applied in making an electric generator (micro). The NdFeB magnets that have been successfully made is used to create a prototype small electric generator (double disk type). The characterization results of small electric generator show that electric generator could produce a dc- current about 0.3A at 400 rpm and voltage 12.60 volt with LED light as load.

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Muljadi, Sardjono, P., & Suprapedi. (2015). Preparation and characterization of 5 wt.% epoxy resin bonded magnet NdFeB for micro generator application. In Energy Procedia (Vol. 68, pp. 282–287). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2015.03.257

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