Production of strontium hexaferrite permanent magnets by the CIM technology

Abstract

The possibility of producing permanent magnets based on strontium hexaferrite using Ceramic Injection Molding (CIM) technology was investigated. A ceramic process was used to produce powders suitable for use in CIM technology. Based on the obtained strontium hexaferrite powder, a granulate was prepared for the production of green parts. The obtained parts were subjected to the process of removing the binder—debinding, which resulted in the production of brown parts, which contain a smaller amount of binder and have an open-pore structure. Permanent magnets with dimensions 10×10×5 mm were obtained by sintering of the brown parts in an oxidizing atmosphere. The level of magnetic parameters of strontium hexaferrite samples exceeded 70% of the values typical for industrial isotropic barium hexaferrite magnets according to GOST 24063-80. This is attributed to the presence of pores in the sintered products.