The Most Powerful Magnets

                                                   Power full magnet



Magnets are much more than the devices that people use to pin items to a refrigerator. They have many industrial uses without which modern society would not be possible. The most powerful kinds of industrial magnets for sale today are rare earth. These materials were brought together only a few decades ago in order to improve production in factories which relied on ferrite and alnico magnets. They are superior to previously used in four different categories.
The basic strength of a substance's magnetic field is known as its remanence. Formerly used, made from iron or alloys of iron with aluminum and nickel, generally had a magnetic strength which registered anywhere from 0.2 to 1.4 on the remanence scale. The most superior of these can actually match the strength of some rare earth magnets. However, the latter' superiority in other areas makes them much more desirable.
All are liable to a demagnetizing process which saps their strength. Their ability to resist such effects is known as coercivity. In this area, rare earth magnets outperform others without question. The industrial magnets for sale today have exponentially greater resistance to demagnetization. The maximum resistance to demagnetization of the most powerful ferrite magnet is rated at 300 on the coercivity scale. The most powerful of the rare earth magnets is the neodymium magnet. It tops the coercivity scale with a rating of 2000. This is another reason that of the neodymium variety have become the most popular.
The power of a magnetic field is also dependent on its density. This density is known as the energy product of a magnet. Alnico and ferrite magnets consistently demonstrate density which rates below 100 on an energy product scale. Rare earth magnets, on the other hand, rarely register an energy product less than 100 on this scale. The fields of neodymium magnets are many times denser than those of other, even other rare earth made from samarium cobalt. This has been a significant factor in determining its usefulness in factories.
There is one area in which the rare earth industrial magnets for sale today display weakness compared to the older made from iron and other common metals. Every magnet begins to lose its magnetism when exposed to high temperatures. Just how much heat a magnet can withstand plays an important part in determining its usefulness in industrial settings. The temperature at which it begins to lose its force is known as the Curie temperature. The Curie temperature of neodymium magnets, which generally outperform other magnets in other categories, is quite low. In fact, it is about half that of ferrite magnets. Fortunately, developers discovered how to add elements to the neodymium alloy which raise the Curie temperature of these.