One of the application fields of NdFeB rare earth materials as the main materials, is one of the main basic data support for modern electronic information industry, and everyone's Day bound together in a common cause. With the rapid development of computers, mobile phones, car phones and other communication equipment and the rapid development of energy-saving vehicles, the world demand for high performance rare earth permanent magnetic materials is growing rapidly. NdFeB magnet is now found commercialized features the highest magnet, known as the magnetic king.
In the production of neodymium magnets, as many reports say, from our country can not talk about. This is because, Dy doped magnets (Dy) 80% mining in China, but China has begun to restrict exports. "The factor is to get our neodymium magnets."
In contrast, our country has made "although neodymium magnets indispensable rich data, but can not produce beautiful goods". Therefore, our country behind the "as long as to build factories in China, let's make Professor exchange skills, can supply many raw materials", one of which is the policy with export restrictions.
Neodymium magnet is now occurring magnet commercialization is the highest, can be said to be a magnet in the world of "magneto", it has a very high magnetic function, the maximum energy product (BHmax) higher than the permanent ferrite is more than 10 times.
Neodymium magnet itself machining function is also quite good: operating temperature up to 200 degrees celsius. And its solid texture, functional stability, excellent cost, so its use of extreme. But because of its strong chemical activity, so it is necessary to surface coating processing (such as plating Zn, Ni, electrophoresis, passivation etc.).
This magnet launched by 1984 Sumitomo special metal materials company, is the strongest on the market of the magnet. The strongest before this magnet is developed and SmCo magnets. These two magnets are now used as parts of small engines or loudspeakers. Many machines can be miniaturized, thanks to small, powerful magnets.
When this magnet is applied, when it comes to magnets, people don't say "magnets are material for iron, cobalt, and nickel". But will think of any matter has magnetic induction, only iron, cobalt, nickel magnetic strong magnetic induction scene contrast obviously. Other materials cannot see magnetic induction without strong magnets. Originally magnets are divided into two kinds of paramagnetic and repulsive magnetic.