Several types of high-temperature resistant permanent magnet

There are four main types of high-temperature resistant permanent magnet: aluminum nickel cobalt magnet, neodymium iron boron magnet, samarium cobalt magnet, and ferrite magnet.

Aluminum nickel cobalt magnet: This type of magnet is composed of aluminum, nickel, cobalt, iron, and other trace metals, and has high strength and castability. It can operate at temperatures up to 600 degrees Celsius and is widely used in various instruments and other applications.

Neodymium iron boron magnet: This is the easiest magnet to buy on the market, also known as a strong magnet, with extremely high magnetic properties. Its BHmax is more than 10 times higher than that of ferrite, and it has excellent mechanical properties. The working temperature of neodymium magnets can reach up to 200 degrees Celsius, and are further subdivided into M (80-100 ℃), H (100-120 ℃), SH (120-150 ℃), UH (150-180 ℃), and EH (180-200 ℃) levels based on temperature. It should be noted that the magnetic strength of neodymium iron boron permanent magnets is closely related to changes in ambient temperature, and as the temperature increases, the magnetic force will correspondingly weaken.

Samarium cobalt magnets: According to their composition, Samarium cobalt magnets can be divided into SmCo5 and Sm2Co17. As a rare earth permanent magnet, samarium cobalt magnets not only have high magnetic energy product (14-28MGOe), reliable coercivity, and good temperature characteristics. Its temperature resistance range is usually between 250-350 degrees Celsius, and the temperature resistance performance of samarium cobalt magnets is very stable. They not only perform well in high temperature environments, but also outperform other magnets in low temperature environments.

Ferrite magnet: The temperature resistance range of this magnet is usually between 500 and 600 degrees Celsius.

When selecting high-temperature resistant permanent magnets, the appropriate type of magnet should be selected based on the specific working environment and temperature requirements. For example, between 150 ° C and 180 ° C, UH grade neodymium iron boron high-temperature resistant magnets can be selected; Between 180-200 degrees, EH grade neodymium iron boron high-temperature resistant magnets can be selected; Between 200 ° C and 230 ° C, AH grade neodymium iron boron high-temperature resistant magnets can be selected; At operating temperatures between 250 ° C and 350 ° C, Sm2Co17 samarium cobalt magnets should be selected. For environments with working temperatures exceeding 350 degrees, only ferrite magnets or aluminum nickel cobalt magnets can be selected.

The above information is for reference only. If necessary, it is recommended to consult the magnet supplier or material expert for more detailed and professional advice.