In the past, compass magnets were used for navigation systems on ships, but over time new techniques were developed for the manufacture of more modern magnets, thanks to industrial magnetic materials, is based on ferrite, alnico and rare earth, this combination gives the origin of neodymium magnets, There is a great variety of magnets according to their use, for example we have the Alnico magnets have the properties of good magnetic strength, also has the ability to withstand temperatures up to 400°C to 425°C, the permanent magnets are used in the hard disk devices, which can be reused again t for electric car engines.
In Japan designed a train where it travels by means of magnetism in its rails, also used industrial images as Alnico magnets are formed by an alloy of aluminum, nickel and cobalt, which resists high temperature, should also be known as magnets, are recycled are dissolved in nitric acid feeding the solution continuously, sele adds another alloy to form a new magnet.
It is being made campaign to recycle, by means of old cellular, hard disk damaging that contains images is easier to recycle that to look for it of form of natural mineral, and of the rare earth, since also the magnets have their market as of great demand for the manufacture of batteries of lithium ion, With time it gave a lot of fruits and now several scientists developed a new magnet, which the interesting thing is using a uranium compound, they are working to improve the performance of the technologies, in terms of information storage, this type of technology used is what they call single state.
