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Introduce Five types Permanent Magnet

Introduce Five types Permanent Magnet

Permanent magnet materials currently on the market, as well as due to the production process of the original or cost reasons, not the wide range of applications and eliminated, such as CuNiFe Magnet The FeCoMo Magnet The, FeCoV Magnet The MnBi Magnet The AlMnC Magnet The.

1.NdFeB Magnet
according to the production process is divided into the following three

a. Sintered NdFeB Magnet
(Sintered NdFeB permanent magnets after grinding the powder after the airflow smelting, high values ​​of coercive force, and has high magnetic properties, the maximum energy product (BHmax) higher than 10 times higher than the ferrite (the Ferrite) its own mechanical properties is also very good, cutting different shapes and drilling. high-performance products of the highest operating temperature of up to 200 degrees Celsius. easily lead to corrosion due to its material content, according to different requirements must be on the surface different coatings (such as plating of Zn, Ni, Au, Epoxy, etc.) very hard and brittle, highly resistant to retreat magnetic, high cost / performance ratio does not apply to the high operating temperature);

b. Bonded NdFeB Magnet
Bonded NdFeB NdFeB powder and resin, plastic or low melting point metal binder uniformly mixed, and then use compression, extrusion or injection molding methods such as composite made of NdFeB. Forming, no secondary processing, can be made into complex shapes. All directions of the bonded NdFeB magnetic, can be processed into NdFeB compression molds and injection molds. High precision and excellent magnetic properties, good corrosion resistance, good temperature stability.

c. Zhusu NdFeB Magnet
High accuracy, easily made from the anisotropic shape of complex thin-walled rings or thin magnet

2. Sintered the Ferrite Magnet
The main raw material, including BaFe12O19 and SrFe12O19, and divided into isotropic and anisotropic magnet according to the orientation of the magnetic crystal. Due to its low price and moderate magnetic energy to become the most widely used as a magnet. The annual production of 300 tons or more. Ferrite magnet is made of ceramic technology, the texture is relatively hard, but also in the case of brittle materials, has become the most widely used permanent magnets, ferrite magnets have good temperature and low prices.

3. Rubber Magnet
Is a series of Ferrite Magnets, bonded ferrite material powder and synthetic rubber compound by extrusion, calendering, injection molding process and made of soft, flexible, and can distort the magnet . Can be processed into strips, rolls, sheet, and a variety of complex shapes. Rubber magnet by the magnetic particle (SrO6Fe2O3), the composition of the polyethylene (CPE) and other additives (EBSO DOP), by extrusion, calendering made. Rubber Magnets can be homosexual or heterosexual, it is made of ferrite powder, CPE and certain trace elements can bend, twist, scroll up. It does not require more machining can be used, you can also trim shape of the desired size, the complex of PVC rubber magnet according to customer requirements, gum, on the UV oil. Its energy product between 0.60 to 1.50 MGOe. Rubber Magnets areas of application: refrigerator, messages, notices rack, advertising and other objects fixed on the metal body to be used as fasteners, for toys, teaching instruments, switches and sensors disk. Mainly used in micro motors, refrigerator, disinfection cabinet, kitchen cabinet, toys, stationery, advertising and other industries.

4 .AlNiCo Magnet
The earliest development of a permanent magnetic material is an alloy of aluminum, nickel, cobalt, iron and other trace metals. According to the different production processes into Sintered Alnico Sintered of AlNiCo Cast Alnico Cast of AlNiCo. The product shape is round and square. Casting process can be processed production into different sizes and shapes; compared with the casting process and sintered products is limited to the small size of its production out of the rough size tolerance rough better than casting products, magnetic properties to be slightly lower than the casting products, but can be processed is better. The cast aluminum nickel and cobalt permanent magnet permanent magnet materials, the lowest reversible temperature coefficient, operating temperature up to 600 degrees Celsius. Alnico permanent magnet products are widely used in various instruments and other applications.

5, SmCo Magnet
Based on the composition of the different divided into SmCo5 and of Sm2Co17, respectively, for the undertaking of generation and the undertaking of the second generation rare earth permanent magnet materials. Its development because of its raw material is very scarce, expensive and restricted. Samarium cobalt (SmCo) as second-generation rare earth permanent magnet, not only has a high energy product (14-28MGOe) and reliable coercive force, but in the rare earth permanent magnet series showed good temperature characteristics. Compared with NdFeB, samarium cobalt is more suitable for work in high temperature environment.

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