SPECIALTY MATERIALS PROCESSING TECHNIQUES FOR ENHANCED RESONANT FREQUENCY HEXAFERRITE MATERIALS FOR ANTENNA APPLICATIONS AND OTHER ELECTRONIC DEVICES

摘要

Processing techniques for forming a textured hexagonal ferrite materials such as Z-phase barium cobalt ferrite Ba₃Co₂Fe₂₄O₄₁ (Co₂Z) to enhance the resonant frequency and other magnetic properties of the material for high frequency applications are provided. The processing techniques include magnetic texturing by using fine grain particles and sintering the material at a lower temperature than conventional firing temperatures to inhibit reduction of iron. The processing techniques also may include aligning M-phase (BaFe₁₂O₁₉ uniaxial magnetization) with non-magnetic additives in a static magnetic field and reacting with BaO source and CoO to form Z-phase (Ba₃Me₂Fe₂₄O₄₂). In some implementations, processing techniques includes aligning Co₂Z phase (planar magnetization) with magnetic texturing occurring in a rotating magnetic field.