Sintered Ferrite magnets, commonly referred to as Ceramic magnets, have been a staple in the magnetic materials industry since their development in the late 1950s. These magnets are produced by combining a composite powder made up of 80% iron oxide and 20% barium or strontium oxide. The process involves die-pressing this powder into desired shapes and then sintering the components in a furnace at around 1200°C.

Ferrite magnets are highly favored in various industries due to their affordability. They are available in multiple forms, such as blocks, rings, and discs, making them versatile for a wide array of applications. Their principal uses include DC motors, loudspeakers, reed switch operations, magnetic separator assemblies, and general holding systems like pot magnets. For custom requirements, un-magnetised Ferrite blocks can be precisely machined using diamond cutting techniques.

One of their key strengths is the excellent resistance to demagnetisation. Ferrite magnets can be magnetised either before or after assembly, ensuring their performance remains unaffected. These magnets are suitable for operating in a temperature range of -40°C to +250°C. However, it is important to be aware of their poor temperature coefficient, with a reduction in remanence of about 0.2% per degree Celsius when heated above zero.

Ferrite magnets also demonstrate remarkable corrosion resistance, even in saltwater environments, and maintain good chemical stability, except in the presence of concentrated acids like hydrochloric acid.

Due to their ceramic-like properties, Ferrite magnets require grinding techniques for machining. Additionally, their brittle nature necessitates careful handling to avoid breakage.