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Temperature coefficient and characteristic curve of neodymium magnets

NdFeB magnets are the strongest commercially available magnets, and they are stronger than another rare earth magnet samarium cobalt below 150°C. Today, at the request of many engineers, we would like to introduce its temperature coefficients and characteristic curves to you.

The following pictures show the temperature coefficient of remanent magnetization and temperature coefficient of endowed coercivity for each grade of sintered NdFeB;

Temperature coefficient of neodymium magnet

The temperature coefficient of endowed coercivity (Hci with temperature) of NdFeB, b, is about -0.6%/degree Celsius (from ambient temperature but may be between -0.45%/degree Celsius and -0.6%/degree Celsius depending on the grade of neodymium) between +20 and +120 degrees Celsius.

The temperature coefficient of remanent magnetic induction a (how Br varies with temperature) for NdFeB is -0.12%/degree Celsius (from ambient temperature, but may be between -0.08%/degree Celsius and -0.12%/degree Celsius depending on the grade of neodymium).

It is important to note that, strictly speaking, these a and b values actually vary with temperature, and using stated values above 20 to 120 degrees Celsius may lead to inaccurate designs (actual BH curves at temperature can help clarify for design purposes).

The graph below shows the temperature characterization curves for Ndfeb versus Sm2Co17;


The end of the article, I hope to help you, there is a need for non-standard customized high-performance, difficult, thin or flat, large or small rare earth neodymium iron boron magnets remember to contact courage Oh!

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