What is the Strongest Commercial Permanent Magnet in the World?
The Strongest Permanent Magnet-Neodymium Magnets
At room temperature, the neodymium magnet is the most powerful permanent magnet.
But this is only at room temperature. Early Neo magnets had an annoying flaw: they were sensitive to temperature, and when the temperature rose, the magnetism dropped dramatically, and when it was above 100 degrees Celsius, it was completely demagnetized. But now an improvement has been found by adding a small amount of dysprosium, another rare earth metal, which is less sensitive to temperature changes.
At the same time, a technological revolution driven by permanent magnets opened the curtain. Anywhere you want to produce the strongest magnetic field with the least amount of material, Neo permanent magnets are preferred: car engines, spindle motors on CD and DVD readers, electric signals converted into sound diaphragms in headphones and speakers, and super magnetic fields needed in medical magnetic resonance technology… By 2010, even though cheaper ferrites still dominated the market, neodymium permanent magnets were worth more than a dozen or even hundreds of times more than ferrites in terms of volume.
However, when Neo permanent magnets were developed, the demand for rare earth metals surged. Rare earth metals aren’t really rare on the planet — they are a few parts per million in the earth’s crust — they’re “rare” because they’re hard to find.
Search for new permanent magnet materials
Each computer needs only 50 grams of Neo permanent magnet. It doesn’t seem like much, but given the number of computers around the world, it’s almost an astronomical number. Now, with the rise of green energy technology, the consumption of computers has become a great mystery. Turbine motors in wind farms, as well as electric cars and bicycles, require lightweight and powerful permanent magnets, and only Neo magnets currently meet the requirements. Each electric vehicle consumes 2 kilograms of Neo permanent magnets. The power of megawatt wind turbines will consume 2/3 tons of Neo permanent magnets. Therefore, it is imminent to develop new and stronger permanent magnets. It is better to reduce the number of rare earth metals. The ideal situation is to stop using rare earth metals.
NdFeB magnet is mainly made of Neodymium, Iron and Boron with excellent magnetic property, produced by powder metallurgical method with chemical composition of Nd2Fe14B, possesses high energy ranging from 26MGOe to 50 MGOe and wonderful coercive force, high resistance to demagnetization. This group of magnetic materials provides the highest available.
NdFeB magnet can be used as an ideal magnet in mini-motor, sensors, audio Speaker or Auto Parts etc. The surface treatment method include Zine, Nickel, Tin, Silver, Phosphor and Spray Epoxy Resin etc.
Poorest corrosion resistance of all commercial magnetic material.
Excellent cost to performance ratio and high resistance to demagnetization
Not suitable for application which exposed in high temperature conditions
No tooling charges require and small quantity available