There are mainly two types of ferrite(ceramic) magnets, Barium ferrite (BaO.6Fe2O3) and Strontium ferrite (SrO.6Fe2O3). Compared with other permanent magnets, sintered ferrite magnet is cheap. It is most suitable for most sensitive, but need not very high performance applicaitons.

Product details:

Sintered ferrite magnets can be used in between -40 °C and +200 °C .Being hard and brittle, they can be cut by using diamond tools. The raw material of sintered ferrite magnets is oxide, thus they would not be rusted under severe environment nor affected by many chemicals (except some strong acids).