Ceramic magnets, also called Ferrite magnets, are composed of strontium carbonate and iron oxide. They are widely used in motors, loudspeakers, and toys due to good resistance to demagnetization and their low cost. Ferrite magnets are manufactured through sintering and injection molding process. Although tooling for injection molding process is very expensive, the resulting parts can have intricate shapes and tight tolerances. Despite of their poor thermal stability, ferrite magnets may be used in environments up to 300°C. Being hard and brittle, they can only be cut or ground to size using diamond wheels. The corrosion resistance of ferrite is considered excellent, so there is no coating needed for surface protection.