New processing technique yields large ferrite components

The availability of large geometry ferrite cores, diameters >20", is currently absent in the United States. Ceramic Magnetics has developed a process working with Oak Ridge National Laboratories to cast ferrite materials in large geometries. An overview of the process and expected tooling cost for ferrite cores and comparison to conventional processing techniques is discussed. The magnetic and physical properties of NiZn materials (Ni/sub 0.4/Zn/sub 0.6/Fe/sub 2/O/sub 4/) produced by this process are compared to cores produced by conventional techniques.