The working temperature can reach up to 200 degrees Celsius. Powerful magnets are hard in texture, stable in performance, and have good cost performance, so they are widely used. But because of its strong chemical activity, it must be coated on its surface. (Such as Zn, Ni plating, electrophoresis, passivation, etc.). Samarium cobalt (SmCo) is divided into SmCo5 and Sm2Co17 according to the composition. Due to the high cost of its materials, its development is limited. As a rare earth permanent magnet, samarium cobalt (SmCo) not only has a high magnetic energy product (14-28MGOe), Strong Square Magnet reliable coercive force and good temperature characteristics. Compared with NdFeB magnets, SmCo magnets are more suitable for working in high temperature environments. Ferrite magnet Its main raw materials include BaFe12O19 and SrFe12O19. Powerful magnets are made by ceramic technology. They are relatively hard and brittle materials. Ferrite magnets have become the most widely used permanent magnets because of their good temperature resistance, low price and moderate performance.Powerful magnets refer to NdFeB magnets. Compared with ferrite magnets, AlNiCo, and SmCo, its magnetic properties greatly surpass other types of magnets. NdFeB magnets can absorb 640 times their own weight, so NdFeB magnets are often used by outsiders. Called a strong magnet. Powerful magnets can be magnetized and demagnetized, because the magnet itself is or will be somewhat magnetic, so we can formulate a certain method for demagnetization according to the use of strong magnets. High-temperature demagnetization method: The main operation of high-temperature demagnetization method is to put the magnet into a high-temperature furnace for heating.