The ferrites are a class of non-metallic magnetic materials formed by mixture of various metallic oxides, which react in the solid state at high temperatures. These have come to their own in the past 50 years. During this time, their use has become established in many branches of communication and electronic engineering. Ferrites now embrace a very wide variety of compositions, properties and applications.
Primitive Compasses, Diamond or Cubic Boron Nitride, Impeder Coolant Systems, High Frequency Welding of Tubes and Pipes, communication and electronic engineering. etc.