Effect of Slurry Preparation Conditions of Soft Ferrite Powder on the Properties of Its Sintered Body

Abstract

Effect of Mn-Zn slurry preparation conditions on the properties of its sintered body was examined for a granule compaction process. Poly-vinyl alcohol (PVA) binder or poly-acrylic-acid (PAA) binder was used to prepare the aqueous slurry of Mn-Zn oxides powder. The granules prepared with the acrylic binder resulted in a higher density, fracture strength and saturation magnetic flux density of the sintered body. The granules with PVA had a higher compressive strength, and formed a sintered body with a larger pore and a lower density. A thick segregated binder layer was observed on the surface of granules when PVA was used, which contributed to the higher strength of the green body compared to the granules prepared with PAA binder.