4: Magnetic Ceramics
Magnetic ceramics are divided into two categories – traditional low conductivity magnets and superconducting magnets.
Low conductivity magnets are used in applications where the magnet is required to have some electrical insulating properties, such as in transformers.
Superconducting magnets are a special class of ceramics that are able to conduct electricity with no resistance and therefore no energy loss. This special property is limited, however, as it is only possible below a critical magnetic field and a critical temperature, TC, which is always very cold.