Neodymium Iron Boron
Demands of the NdFeB magnets have been growing rapidly in the global market such as information technologies , Motors, Medical equipment and so on.Neodymium magnets are widely used in the following areas: Office Automation - Personal computers, Copiers, Printer Electrical energy - Flywheels, Wind power station Science and Research - ESR(electron spin resonance), Magnetic levitation, Photon generation Medicine - Dental materials, Imaging Industry - Industrial robots, FA(factory automation), - Televisions, DVD(digital video disc). Transportation - Small motors, Sensors, Automobiles, EV(electric vehicles, hybrid cars) Telecommunications - Mobiles communications, PHS(personal handy-phone system) Health care: MRI, medical treatment equipment. Daily Use -- Magnetic tool holder, magnet clasp for bag and jewelry, Toys application.
| Product Name | Neodymium Magnet, NdFeB Magnet | |
| Material | Neodymium Iron Boron | |
|
Grade & Working Temperature |
Grade | Working Temperature |
| N30-N55 | +80℃ | |
| N30M-N52 | +100℃ | |
| N30H-N52H | +120℃ | |
| N30SH-N50SH | +150℃ | |
| N25UH-N50U | +180℃ | |
| N28EH-N48EH | +200℃ | |
| N28AH-N45AH | +220℃ | |
| Shape | Disc, Cylinder, Block, Ring, Countersunk, Segment, Trapezoid and Irregular shapes and more. Customized shapes are available | |
| Coating | Ni, Zn, Au, Ag, Epoxy, Passivated, etc.. | |
| Application | Sensors, motors, filter automobiles, magnetic holders, loudspeakers, wind generators, medical equipment, etc. | |
Ferrite / Ceramic
Overview:
Permanent ferrite magnet, also known as hard magnet, is a non-metallic magnetic material.In 1930, Kato and Wujing discovered a kind of spinel (MgA12O4) permanent magnet, which is the prototype of ferrite widely used today.Ferrite magnet are mainly made of SrO or Bao and Fe2O3 as raw materials by ceramic process (pre firing, crushing, pulverizing, pressing, sintering and grinding). It has the characteristics of wide hysteresis loop, high coercive force and high remanence. It is a kind of functional material that can keep constant magnetism once magnetized. Its density is 4.8g/cm3. According to different production processes, ferrite magnet can be divided into two types: sintering and bonding. Sintering can be divided into dry pressing and wet pressing, and bonding can be divided into extrusion, compression and injection molding. The soft, elastic and twisted magnet made of bonded ferrite powder and synthetic rubber is also called rubber magnet. According to whether the external magnetic field is applied or not, it can be divided into isotropic permanent magnet and anisotropic permanent magnet.
Compare with other magnetic materials
Advantage: Low price, wide source of raw materials, high temperature resistance (up to 250 ℃) and corrosion resistance.
Disadvantage: Compared with NdFeB products, its remanence is very low. In addition, due to the relatively loose and fragile structure of its low density material, many processing methods are limited by it, such as punching, digging, etc., the majority of its product shape can only be pressed by the mold, the product tolerance accuracy is poor, and the mold cost is high.
Coating: Due to its excellent corrosion resistance, it does not need coating protection.
Samarium cobalt
Samarium cobalt magnet is a kind of rare earth magnet. It is a kind of magnetic tool material made of samarium, cobalt and other metal rare earth materials through proportion, melting into alloy, crushing, pressing and sintering. It has high magnetic energy product and extremely low temperature coefficient. The maximum working temperature can reach 350 ℃, and the negative temperature is unlimited. When the working temperature is above 180 ℃, its maximum magnetic energy product (BHmax) and coercivity (co The temperature stability and chemical stability are higher than those of NdFeB.
Alnico
Al Ni Co is an alloy composed of aluminum, nickel, cobalt, iron and other trace metal elements. It has high remanence, low coercivity, good corrosion resistance, low temperature coefficient, high temperature resistance, humidity resistance, strong corrosion resistance, not easy to oxidize and good working stability. Sintered al Ni Co is produced by powder metallurgy. It is widely used in automotive parts, instrumentation, motor, electroacoustic, communication, magnetoelectric switch, sensor, teaching and aerospace.
Flexible Rubber Magnet
Flexible magnets are very similar to the injection molded magnets but are produced in flat strips and sheets. These magnets are lower in magnetic strength and very flexible depending on the materials that was used in the compound with the magnetic powders. Vinyl is often used in this type of magnet as the binder.
