What are the characteristics of different types of magnets?

  • Ningbo Tengxiao Magnetic Industry Co., Ltd. is a professional supplier of magnetic products and magnetic equipment, specializing in the production of high-quality NdFeB magnets, strong ndfeb magnet and other magnetic equipment. Let me introduce the characteristics of magnet.

    1. Alnico magnet: is an alloy composed of aluminum, nickel, cobalt, iron and other trace metal elements. The casting process can be processed into different sizes and shapes, and the workability is very good. The strong magnet cast AlNiCo permanent magnet has the lowest reversible temperature coefficient, and the working temperature can be as high as 600 degrees Celsius. Alnico permanent magnet products are widely used in various instruments and other applications.

    2. Neodymium iron boron magnet: It is the magnet with the highest commercial performance currently found. It is called the magnet king. It has extremely high magnetic performance and its maximum magnetic energy product (BHmax) is more than 10 times higher than that of ferrite. The machining performance of the magnet itself is also quite good. The operating temperature can reach up to 200 degrees Celsius. Strong magnets are also hard in texture, stable in performance, and cost-effective, so their applications are extremely wide. But because of its strong chemical activity, the magnet must be coated on its surface. (Such as Zn, Ni, electrophoresis, passivation, etc.).

    3. Samarium Cobalt (SmCo): It is divided into SmCo5 and Sm2Co17 according to the composition. Due to the high price of its materials, its development is restricted. Samarium cobalt (SmCo), as a rare earth permanent magnet, not only has a high magnetic energy product (14-28MGOe), reliable coercivity and good temperature characteristics. Compared with neodymium iron boron magnets, samarium cobalt magnets are more suitable for working in high temperature environments.

    4. Ferrite magnet: Its main raw materials include BaFe12O19 and SrFe12O19. Powerful magnets are manufactured by ceramic technology. They are relatively hard in texture and are brittle materials. Ferrite magnets have become the most widely used permanent magnets due to their good temperature resistance, low price and moderate performance.

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