China Neodymium And Ferrite Magnets Manufacturer & Supplier 
In magnetic applications, heat resistance is a very important indicator. Recently, we have received inquiries from several overseas customers about high-performance heat-resistant magnets. Below, we will introduce the materials used in high heat resistant magnets and how to choose them.
Since everyone has a different understanding of the heat resistance temperature of high heat-resistant magnets, today, Mr. Fu will mainly introduce the three most commonly used types currently available on the market.
Neodymium material is currently the most widely used type, meeting over 90% of customer requirements for magnetic performance and high-temperature resistance. By adding heavy rare earth elements such as dysprosium (Dy) and terbium (Tb), it can withstand temperatures of approximately 200°C. It supports processing into standard or special shapes without the need for molds.
Ceramic ferrite magnets also have good high-temperature resistance, with a typical operating temperature of around 250°C. Ferrite magnets suitable for use in high-temperature environments are generally high-density sintered ferrites, which perform well in micro-motors or sensors operating at high temperatures.
Another commonly used material is samarium cobalt, which is an alloy of samarium (Sm) and cobalt (Co), typically SmCo5 or Sm2Co17. It has a temperature resistance range of 250-350°C, with special grades reaching 500°C. Its main features are excellent temperature stability and corrosion resistance, but it is relatively expensive.
Can you tell what kind of heat resistant magnet material this is?
As for aluminum nickel cobalt, it has a higher temperature resistance of up to 500-550°C, but we have received fewer inquiries about it, with the first three types being the most popular.
When choose materials, it is recommended to choose a grade with a working temperature 20-30% higher than the actual requirement. For temperatures below 200°C, high temperature resistant neodymium grades are preferred. For use in the 200-350°C range, samarium-cobalt or ferrite should be considered based on magnetic requirements. Samarium cobalt has superior magnetic properties and temperature resistance compared to ferrite. For environments above 350°C, alnico is recommended.
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