Textured microstructures in barium hexaferrite by magnetic field assisted gelcasting and templated grain growth

Abstract

The objective of this paper is to describe a method of producing textured barium hexaferrite by magnetic field assisted gelcasting while avoiding the limited solids loading caused by stacking of barium hexaferrite plates. We illustrate here a method of gelcasting a matrix of non-magnetic iron (III) oxide and barium carbonate in the presence of barium ferrite seeds for templated grain growth. At high temperatures, the iron oxide and barium carbonate react to form a fine-grained barium ferrite matrix surrounding the previously aligned barium ferrite seeds.