Rare earth magnets are the strongest permanent magnet […]
Rare earth magnets are the strongest permanent magnets manufactured and are an indispensable part of the high-tech industry, especially in the field of clean energy, such as wind turbine generators and electric car motors. China mines and produces more than 95% of the world's rare earth minerals and has reduced exports since 2010. In addition to supply chain issues, the mining process has caused great damage to the environment.
But which magnet is stronger than neodymium magnets?
Recently, a lot of experimental work has been done on iron and nitrogen to combine to make stronger iron nitride magnets. In the beginning, the experiment only produced films or powders, which were not suitable for many applications. However, when using this manufacturing process and producing block magnets that can be used in a variety of applications. In addition, the manufacturing process is very compatible with the existing mass production technology. The input cost of nitrogen and iron is relatively low, so it is possible to manufacture extremely inexpensive permanent magnets that exceed the performance of rare earth magnets.
Advantages and characteristics of iron nitride
Iron nitride permanent magnets do not require any rare earth input. It uses low-cost and common nitrogen and iron inputs.
Iron nitride permanent magnets are environmentally friendly.
Iron nitride permanent magnets are compatible with mass production technology.
This strongest iron nitride permanent magnet is used in many high-tech applications, including electronics, wind turbines and electric motors.
If the theoretical limit of the magnetic performance of the iron nitride permanent magnet is more than twice the maximum reported magnetic energy of the rare earth magnet.
The other two magnets are considered as strong as neodymium magnets
Dysprosium has a higher magnetic field strength than all other elements, and it is added to neodymium magnets to increase its resistance to corrosion and demagnetization. Neodymium magnets are easily corroded because they are very hard and dysprosium makes them brittle.
Another stronger magnet is Somarium Cobalt. Compared with neodymium, samarium cobalt provides you with unique features, such as higher energy density at high temperatures. In terms of its use in applications, samarium cobalt is now the same as neodymium magnets.
We currently have many devices that use magnets. Earphones, earphones, and speakers have magnetic coils and magnets that convert electrical signals into sound. Propellers and fans also have magnets, which convert electrical energy into mechanical energy and vice versa. Power plant generators use magnets to drive the generator. Freezers and refrigerators use bar magnets as door seals to seal the internal atmosphere of the freezer and refrigerator. Now, samarium cobalt and dysprosium are used in many applications instead of neodymium magnets.