Research paper cite many potential applications for ferrite compositions in the form of nano particles and ceramics.
Besides wide usage in telecommunications, the largest commercial applications of ferrites is in the area of inductors, filtering and transformers. and are practically used in a lot of electronic instrumentation.
Practically in switched mode power supplies there is a lot of use for ferrite transformers.
Ferrites have importance in engineering and technology because they possess spontaneous magnetic moment below the Curie temperature just as iron, cobalt, nickel.
Due to very low eddy current losses, ferrites are used as a core of coils in microwave frequency devices and computer memory core elements.
Due to relatively low permeability and flux density compared to iron, ferrites are not suitable for the use in high field and high power applications, such as motors, generators and power transformers, but they can be used in low field and low power applications.
Ferrites are used as ferromagnetic insulators in electrical circuits.
Ferrites like ZnO find low frequency applications in timers. They are also used as switches in refrigerators, air conditioners, etc.
Ferrites are used as magnetic head transducer in recording.
Article Preparation and Diverse Properties of Cobalt Ferrite Ferrofluid