Neodymium disc magnets form one of the wonders of the modern world. They are immensely powerful for their size and as a result can be used in extremely small applications while still providing the necessary magnetism. This technology has been partly responsible for the continuously reducing size of machinery and electronics. The properties and nature of neodymium are very unusual and unique, which makes it a fascinating material in itself. It is also interesting to read about its most popular uses. Finally,here are some astounding issues that crop up during the handling of these magnets due to their sheer strength. In this article, we will look at each of these points in order.
What Is A Neodymium Magnet?
Neodymium is known as a rare earth element. This name is something of a misnomer, however, as neodymium is actually quite plentiful in the Earth’s crust. It is quite difficult to mine, though, since it is not often found in large quantities, instead being spread out relatively evenly in the ground. There are three main properties that set neodymium magnets apart. The property known as “remanence” is a measure of the magnetic field strength. “Coercivity” is a measure of its resistance to demagnetism. Finally, its “energy product” is a measure of the density of its magnetic energy. These three properties are far higher in neodymium magnets than in almost any other kind.
Uses and Applications
In any situation where small size and great magnetic strength are valued, you will likely see neodymium disc magnets. You can find them in many cordless power tools, for example. A typical DIY drill may well be driven by neodymium magnets, and they can also be found in many other motor applications. Hard disk drives in computers also often use this material, since the small size of a laptop is exactly the sort of place in which its unusual properties are best used.
The extremely high magnetism can cause indirect dangers. Magnetism is not itself a dangerous force, but a strong attraction between two metal objects certainly can be. One such example is that of children’s toys. There have been reports of young children swallowing tiny neodymium magnets. A single magnet is rarely a problem, but if there are two or more of them then serious problems can occur. The two magnets can attract each other inside the gut and they become stuck. This usually requires surgical intervention.
Neodymium disc magnets are a fascinating invention. The material is exotic and difficult to procure, and it has extraordinary properties when used as a magnetic material. You can find it used in many everyday applications such as computers and drill motors. Even some children’s toys use these magnets, but beware of the consequences of playing with extremely strong magnets; they can be fatal.