Rare-earth magnets gained prominence in industrial use in 1984. Neodymium magnets are among the strongest rare-earth magnets. The magnets are made from an alloy of Neodymium, Iron and Boron. When the three elements are combined, they create the crystalline structure of Neodymium, which is tetragonal. They are used in applications that need high-powered magnets, because of their strong magnetic field. There are three types of Neodymium: regular neodymium, isotopic neodymium, and corrosion-resistant neodymium. Here are the qualities which make these magnets some of the best in the field.
One of the main disadvantages that regular magnets have is that they lose their strength when subjected to high temperatures. Neodymium magnets are different because they retain their strength even when operating at 200 degrees Celsius. This quality makes Neodymium magnets great for heavy industrial applications. Common applications include electronic sensors, automotive DC motors, wind turbines and magnetic bearings in heavy industries. Note that sintered Neodymium magnets are sometimes sensitive to oxidation and rusting. It, therefore, needs a coating of Zinc to be protected from corrosion in heavy industries.
Strong Magnetic Field
Neodymium magnets are graded according to their strength. This is indicated by the letter N followed by a number. Stronger magnets will have a bigger number following the N while the weaker ones will have a smaller number. The strongest Neodymium magnet has a rating of N52. The rating also indicates whether the magnet has the same strength when subjected to high temperatures. Usually, a letter follows the number to indicate temperature. Note that Neodymium magnets are ten times stronger than the common ceramic magnets. If planning to buy a Neodymium magnet, it would be advisable to get a small one.
Resistance to Demagnetisation
The other great benefit of Neodymium magnets is how well they resist demagnetisation. Most regular magnets lose their strength when they are dropped or when placed around other magnets. The only reason a Neodymium magnet would lose its strength is if it was heated above the maximum operating temperature. They will, therefore, last and serve you for a long time, as long as they operate within the set temperature limits.
These are a few of the qualities which make Neodymium magnets the best in the market. It is advisable to get magnets from reliable suppliers who can provide superior quality rare-earth block magnets. Additionally, since Neodymium is prone to chipping and cracking, always insist on non-machined Neodymium magnets.