8 Things You Need to Know About Neodymium Magnets
What is a Neodymium Magnet?
Neodymium magnets, also known as NdFeB magnets, are composed of chemical elements such as neodymium, iron and boron, and are an artificial permanent magnet. As the most commonly used rare earth magnet, neodymium magnets are widely used in electronic products, such as hard drives, earphones, mobile phones and so on.
Why Can Neodymium Magnets Be Dangerous?
The main reason strong neodymium magnet is dangerous is its strong magnetic force.
1. Dangers to humans
Due to the force exerted by the magnets, there is a risk of injury to the human body, and even the risk of crushing fingers and fractures when mishandled. Particular attention should be paid to the risks to children when playing with magnets.
2. Damage to magnetically sensitive items
Magnetically sensitive items need to keep a safe distance, rubidium magnets are ten times stronger than ordinary magnets. Items that will be affected by strong magnets include, but are not limited to: pacemakers, mechanical watches, credit cards, disks and other magnetic storage media (such as video tapes), etc.
How Strong Are Neodymium Magnets?
Neodymium magnets are called “magnet kings” and have extremely high magnetic properties. Its magnetic properties are superior to those of ferrite magnets, alnico magnets, and samarium cobalt magnets. NdFeB has an extremely high magnetic energy product and coercive force, which can absorb heavy objects equivalent to 640 times its own weight, and its maximum magnetic energy product (BHmax) is more than 10 times higher than that of ferrite.
Why Are Neodymium Magnets So Strong?
The reason for the strong magnetism of neodymium strong magnet is that the atoms in the rubidium magnet are arranged regularly and there is no irregular movement so that it can concentrate external energy.
Rubidium magnets are composed of regular iron, rubidium, and boron atoms closely arranged. The combination of these three kinds of atoms has good stability and will not move randomly.
Under normal temperature conditions, the three kinds of atoms are regularly arranged together, and no atomic movement occurs. After the magnetic force is injected, the rubidium magnet atoms will not move irregularly during the process of obtaining external energy input between the rubidium magnet atoms. This allows the energy obtained by the entire rubidium magnet atom to be used in a concentrated manner, exerting a concentrated effect.
What is Neodymium Magnets Used For?
NdFeB magnets are widely used in hardware machinery, electronics, medical equipment, electrical machinery, toys, packaging, aerospace, and other fields. The more common ones are permanent magnet motors, speakers, computer disk drives, and magnetic resonance imaging equipment instruments.
However, in order to avoid corrosion damage, it is necessary to do protective treatment on the surface of NdFeB material during use. For example, electroplating with nickel, zinc, and tin, or spraying epoxy resin on the surface.
H2: How Long Do Neodymium Magnets Last?
Neodymium magnets basically stay magnetic forever. But magnetism weakens over time, and neodymium magnets are estimated to lose a small fraction of their magnetism every 100 years.
Permanent magnets will retain their magnetic properties for many years if stored and used under optimal working conditions. Optimum working conditions mean not subjecting the magnets to temperatures above their maximum operating temperature, protecting the magnets from corrosion, not subjecting them to strong magnetic fields, etc. Stray magnetic fields, high temperatures, electrical currents, radiation, and humidity can cause damage to the magnetic properties of neodymium magnets.
How to Separate Neodymium Magnets?
To separate rubidium magnets, do not try to separate the magnets with your fingers, avoid putting your fingers between the two magnets. Pulling the magnet vertically away from the attracted surface should also be avoided.
It should be pushed between the two magnets using a non-magnetic object tool. And separate them by sliding the magnets across the surface.
What Temperature Do Neodymium Magnets Lose Their Magnetism?
Standard N-series neodymium magnets can normally withstand temperatures up to 80 degrees. When the temperature reaches 80 degrees, the magnetism will begin to decrease. If the magnet is quickly returned to room temperature, all of its magnetism will be restored. However, if NdFeB is placed in an environment with a temperature higher than 80 degrees for a long time, the magnetism of NdFeB will be permanently lost.
KENENG produces various shapes of neodymium magnet for sale, and can also customize magnets according to your specific needs and drawings.
