Method of making a ferrite element

Abstract

A ferrite element for millimeter-wave ferrite control devices is made by -plasma-spraying ferrite material into a mold type cavity having the configuration of the desired ferrite element.

What is claimed is: 
     
       1. Method of making a ferrite element for millimeter-wave ferrite control devices from a mold type cavity having the configuration of the desired ferrite element, said method comprising coating the surface of the cavity with a mold release solution so as to allow easy removal of the completed ferrite element, filling the cavity with ferrite by arc-plasma-spraying, removing the ferrite element from the cavity and annealing the ferrite element to optimize the ferrite magnetic properties. 
     
     
       2. Method according to claim 1 wherein the ferrite element is a Y-shaped ferrite element having very fine tapered feather edges on the three legs of the Y configuration. 
     
     
       3. Method of making ferrite elements for millimeter-wave ferrite control devices from an array of identical mold type cavities, each cavity having the configuration of the desired ferrite element said method comprising coating the surface of the respective cavities with a mold release solution so as to allow easy removal of the completed ferrite elements, filling the cavities with ferrite by arc-plasma-spraying, removing the ferrite elements from the cavities and annealing the ferrite elements to optimize the ferrite magnetic properties. 
     
     
       4. Method according to claim 3 wherein the ferrite element is a Y-shaped ferrite element having very fine tapered edges on the three legs of the Y configuration.