High quality permanent magnetic ferrite ring ferrite magnets are composed of ferric oxide, barium oxide, strontium oxide and other oxides. They are hard and brittle materials with +/-2% tolerance, which require diamond wheels for grinding to the close tolerances.

High quality permanent magnetic ferrite ring ferrite magnets are also called Ceramic ring  Magnets. Since the 1950s, hard ferrite(ceramic)magnets have been widely applied, compared with other permanent magnets, ferrite magnet is cheap. It is most suitable for most sensitive, but need not very high performance applications. As this is a non-metal magnets, it is the ideal magnets for applications that require non-rusty magnets in hum-it environment.

 Composed of a mixture of iron oxide and barium carbonate (or strontium), ferrite is obtained thanks to a sintering process, either dry or wet.

The raw material of high quality permanent magnetic ferrite ring ferrite magnets includes main raw material, additives and flux agents. Fe2O3, BaCO3, SrCO3 and CaCO3 are main raw material of ferrite. The weighing process need to follow the formula strictly, or cannot get the desirable magnetic properties. The raw material will be mixed in specialized equipment after weighing process. The component homogeneity bases on mixing process. There are several factors affect the component homogeneity of mixture.