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1. NdFeB is simply a kind of magnet. Unlike the magnets we usually see, it is called the "King of Magnets" because of its excellent magnetic properties. NdFeB contains a large amount of rare earth elements neodymium, as well as iron and boron, and its characteristics are hard and brittle.
Because the surface is easily oxidized and corroded, NdFeB must be treated with surface coating. Surface chemical passivation is one of the good solutions.
As a kind of rare earth permanent magnet material, NdFeB has extremely high magnetic energy product and coercive force. At the same time, the advantages of high energy density make NdFeB permanent magnet materials widely used in modern industry and electronic technology, making it possible to miniaturize, lighten and thin equipment such as instruments, electroacoustic motors, magnetic separation and magnetization.
The advantages of NdFeB are high cost performance and good mechanical properties; the disadvantages are low operating temperature, poor temperature characteristics, and easy powdering and corrosion. It must be improved by adjusting its chemical composition and taking surface treatment methods to meet the requirements of practical applications.
NdFeB magnetic material, as the latest result of the development of rare earth permanent magnetic materials, is called "magnet king" due to its excellent magnetic properties. NdFeB magnetic material is an alloy of praseodymium, neodymium, boron and iron. It is also called magnetic steel.
2. NdFeB magnets can be divided into bonded NdFeB and sintered NdFeB. Bonding is actually injection molding, while sintering is vacuum molding through high temperature heating! NdFeB magnets are permanent magnets with magnetic force so far. The material grades are N35-N52; various shapes can be processed according to specific requirements: round, square, punched, magnetic tile, magnetic rod, convex, trapezoidal, etc.; despite these advantages, the surface is prone to rust, so some protective surface treatment is usually required: nickel plating, zinc plating, gold plating, epoxy resin plating, etc. The applicable ambient temperature of ordinary NdFeB magnets is below 80 degrees, but there are also several types that can withstand high temperatures of 200 degrees. Mainly used in electronics, electrical appliances, packaging, motors, toys, leather goods, automotive machinery, etc.
