generation of permanent magnets (AlNiCo, Samarium Cobalt and Neodymium
Iron Boron) has improved the performances of magnetic systems, engines, pumps,
bearings, picks ups, alternators (for turbines) and has allowed newer, more
compact and high speed electric engines. With the help of permanent magnets we
can data, move robots and can also sense sound.
Superconductors will allow the electrical current to flow
without any loss of energy (Though, in practice, an ideal superconductor is
very hard to produce) and this type of current is super current. It should be
cooled below certain threshold temperature; the material dramatically loses all electrical resistance. The goal
of having levitating trains and cars, logistic systems and even sports, relies
on the use of room temperature superconductors.
electric category of materials can alternatively be used to
refrigerate. Their presence allows cooling without moving parts with high
reliability. The efficiency of thermoelectric cooling modules (called Peltier
modules) is low and an increase could change the world of refrigeration of cars
(air conditioning systems), homes, freezers, coolers and chillers.