Dysprosium increases the coercivity, enabling magnets to retain their holding force for longer. At the same time, this additive increases the magnet’s usable temperature range. Whilst this is up to 80 degrees Celsius for neodymium-iron-boron magnets, the addition of dysprosium can extend it to over 200 degrees. Only then does demagnetisation set in – one reason why such magnets are also in demand in high-temperature applications such as jet engines and in the defence industry. The element is also used in nuclear reactors and in the manufacture of sensors.
