List of high temperature resistance permanent magnets

I need to buy high temperature resistant magnets any recommendations? Today China neodymium magnet manufacturers courage magnet small Fu for you to introduce those can be resistant to high heat magnet type, if you do not understand you can contact our company to help you.

The meaning of a high temperature magnet is a magnet that can maintain its magnetic force in a high temperature environment.

1. Magnets that can withstand high temperature - AlNiCo magnets

It is an alloy of aluminum, nickel, cobalt, iron and other trace metals, which has good machinability and can operate at temperatures up to 600 degrees Celsius.

2. Magnets that can withstand high temperature - Neodymium magnets

It is the most readily available magnet on the market, known as the magnet king, with extremely high magnetic performance, its BHmax is more than 10 times higher than ferrite, and its operating temperature can reach up to 200 degrees Celsius, the neodymium iron used in brushless motors Boron magnets usually choose 120-150 degrees.

Neodymium magnets are divided into N series grade (＜80℃), M (＜100℃), H (＜120℃), SH (＜150℃), UH (＜180℃), EH (＜200°C).

The magnetic strength of NdFeB magnets is closely related to the change of ambient temperature. Within the operating temperature range, the corresponding magnetic force will weaken for every 1°C increase in temperature. After cooling, most of the magnetic force can return to its original level, which is reversible. This is irreversible if the temperature reaches the Curie temperature and part of the magnet moves violently and demagnetizes.

The figure below shows a comparison of key properties of samarium cobalt, neodymium iron boron, alnico and ceramic ferrite, such as cost, operating temperature, magnetic strength

Temperature resistance, strength, cost comparison of several permanent magnets;

3. Magnets that can withstand high temperature - SmCo magnets

They are classified into SmCo5 and Sm2Co17 according to their composition, and their development is limited due to the expensive materials. As a rare earth permanent magnet, samarium cobalt not only has a high magnetic energy product (14-28MGOe), but also has reliable coercivity and good temperature characteristics. Compared with NdFeB magnets, sa cobalt magnets are more suitable for working in high temperature environment, and its working temperature can reach 250-350 degrees Celsius.

4. Magnets that can withstand high temperature - Ferrite magnets

Its main raw materials include BaFe12O19 and SrFe12O19, and its heat-resistant working temperature upper limit is 250°C. It is the most widely used permanent magnet due to its excellent temperature resistance, low cost and moderate performance.

5. Magnets that can withstand high temperature - iron chromium cobalt magnets

The maximum operating temperature of iron-chromium-cobalt permanent magnets is 400 ° C, so it can maintain magnetic properties below 400 degrees.

The above is the list of permanent magnets that can heat resistant. You can choose according to the magnetic requirements. If you want to know the price of magnets, please contact our company.

Please note that the specific material and temperature range may vary by manufacturer and application. When selecting permanent magnet materials, factors such as operating temperature, magnetic property requirements, and cost need to be considered. In high-temperature applications, appropriate measures also need to be taken to ensure the stability and performance of the magnet.

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