China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Heat-resistant magnet is a kind of magnet that can withstand a certain high temperature, usually based on permanent magnets, can be a variety of shapes, we magnet manufacturers are basically in accordance with the customer's technical requirements to provide, in the reception of the customer, the customer often ask some questions, the editor organized the following.
What is the maximum operating temperature of heat-resistant magnets?
This mainly depends on the material you choose, for example, samarium cobalt magnets are resistant to 250℃~350℃, of which SmCo5 is 250℃ and Sm2Co17 is 350℃. Neodymium magnet material is not so high, the highest heat-resistant 220 ℃ or so. Ferrite, black appearance of the kind, the highest heat-resistant 250 ℃ or so. The highest to belong to Alnico, the highest heat-resistant 450 ℃ ~ 550 ℃.
Radially sintered neodymium rotor magnets for high-speed motors
Do heat-resistant magnets' magnetic properties decay at high temperatures? How to avoid it?
All magnets have irreversible losses at high temperatures (e.g. NdFeB may demagnetize above operating temperature), the solution is to choose a higher temperature resistant grade.
Will heat resistant magnets rust or corrode in a high temperature environment?
Samarium Cobalt and Alnico are highly resistant to oxidation and generally do not corrode. NdFeB material is easy to corrode, need plating protection. If the environment is humid. It is recommended to choose samarium cobalt or do special protection treatment.
Why is the price of heat-resistant magnets higher?
The main reason is the composition, for example, samarium cobalt contains rare earth cobalt (price fluctuation), heat-resistant neodymium iron boron need to add expensive heavy rare earth (such as dysprosium).
How to test the performance of magnets at high temperature?
The main thing is the high temperature demagnetization curve test, customers can test the residual magnetism retention rate after placing the heat-resistant magnet samples in a high temperature environment (e.g. ≥90% required).
Can heat-resistant magnets be customized in shape and size?
Of course you can, you can send us your magnet drawing or size data.
How does the magnetic strength of different heat resistant magnets compare?
It mainly depends on how many degrees Celsius they are resistant to, if it is around 150 degrees Celsius, NdFeB is the best. If it is over 200 degrees Celsius, Samarium Cobalt is the best. Ferrite is not as good as the first two.
How do I mount or secure a heat-resistant magnet?
Generally it is glue or screw fixing, using screw fixing needs to process the screw holes for the heat-resistant magnets.
If you need to buy heat-resistant magnets, special heat-resistant powerful magnets, welcome to let our company provide you with quotations or technical guidance.
Information about heat-resistant magnets;
What Are High-Temperature NdFeB Magnets？