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Classification of neodymium magnets

Nowadays magnets are more and more used in various electronic products and industrial products in life. At the same time, many people have higher requirements for its performance. Choose based on its characteristics? The following briefly introduces its basic knowledge and application scope, hoping to bring you a certain degree of help. Magnets can be divided into "permanent magnets" and "non-permanent magnets". Permanent magnets can be natural products, also known as natural magnets, or they can be manufactured by man (the strongest magnets are neodymium magnets). Non-permanent magnets only have magnetism under certain conditions, and are usually produced in the form of electromagnets, that is, the current is used to strengthen their magnetic field. When we talk about magnets, we generally mean permanent magnets. The permanent magnets are divided into two categories. The first category: metal alloy magnets 1. Sintered RuFeB: a new type of permanent magnetic material developed after 1983. It has extremely high magnetic properties and is widely used in various permanent magnet motors, engineering machinery, electrical sound,

 Electrical appliances and medical equipment. 2. Sintered samarium cobalt permanent magnet is an excellent permanent magnetic material, which has high magnetic measurement performance, and at the same time has strong corrosion resistance, oxidation resistance, low temperature coefficient, high Curie temperature, Used in high environment, widely used in motor, sensor, detector, radar and other high-tech fields. 3. AlNiCo is suitable for producing complex shapes. Light, thin and small products are widely used in instrumentation, communication, magnetoelectric switches and various sensors. 4. Iron-chromium-cobalt magnets are transformers in permanent magnets, and alloy permanent magnets are the most deformable. They can be drawn (0.2-0.3mm) in tube rolling and various mechanical processing. The second category: ferrite permanent magnet materials 1. NdFeB magnets are currently the magnets with the highest commercial performance. They are called magnetic kings. They have extremely high magnetic properties and their maximum magnetic energy product is 10 times higher than ferrites. the above. Its own machinability is also quite good. The maximum operating temperature is 200 degrees Celsius. And its texture is hard, its performance is stable, and it has a very good price-performance ratio, so its application is extremely extensive. But because of its strong chemical activity, its surface coating must be treated. (Such as Zn, Ni plating, electrophoresis, passivation, etc.). 2. The main raw materials of ferrite magnets include BaFe12O19 and SrFe12O19. Manufactured by ceramic technology, the texture is relatively hard and it is a brittle material. Because ferrite magnets have good temperature resistance, low price and moderate performance, they have become the most widely used permanent magnets. 3. Al-Ni-Co magnet is an alloy composed of aluminum, nickel, cobalt, iron and other trace metal elements. Casting process can be processed into different sizes and shapes, machinability

 well. Cast aluminum-nickel-cobalt permanent magnets have the lowest reversible temperature coefficient, and the operating temperature can reach more than 600 degrees Celsius. AlNiCo permanent magnet products are widely used in various instruments and other applications. 4. SmCo is divided into SmCo5 and Sm2Co17 according to the composition. Its development is limited due to its expensive materials. SmCo as a rare earth permanent magnet not only has a high magnetic energy product, reliable coercive force, and good temperature characteristics. Compared with neodymium iron boron magnets, samarium cobalt magnets are more suitable for working in high temperature environments. Shanghai Zhigui Magnetic Industry Co., Ltd. is a high-tech enterprise specializing in the R & D, production and sales of rare earth permanent magnet materials, magnetic devices, magnetic tools and products related to magnetic materials. The company has passed ISO9001 system certification, and produces and sells rare earth permanent magnet products with various performances and shapes. In addition, the company is committed to the research and development, production and

 Sales, to provide customers with high-quality magnetic components and magnetic tool products. At present, our company's NdFeB permanent magnet materials and magnetic components have been widely used in machinery processing, electro-acoustics, motors, instruments, automatic control, wind power generation, luggage, toys, craft jewelry and other fields. We are willing to develop together with customers at home and abroad and create a better future with a sincere attitude.

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