What is the content of rare earth metal dysprosium in various NdFeB magnet grades?

The temperature coefficient of neodymium iron boron magnets is poor. In order to increase the coercive force, thereby increasing the maximum working temperature of neodymium iron boron, add metal dysprosium to the formula.

So what is the content of rare earth metal dysprosium in various NdFeB magnet grades?

• The content of metal dysprosium added in the M grade NdFeB grades is: 0-1%
• The content of metal dysprosium added in H grade NdFeB grades is: 0-2%
• The content of metal dysprosium added in the SH grade NdFeB grades is: 1-4.5%
• The content of dysprosium metal added in UH grade NdFeB grades is: 3-6%
• The content of dysprosium metal added to the EH grade NdFeB grades is: 4-10%

The above data are empirical values, not fixed values.
For a product of a factory, there is an accurate value over a period of time. Manufacturers are also trying to reduce the use of dysprosium to reduce the cost of feeding. Different product requirements of the same performance grade have different content. If it is too precise, the quality assurance will be poor. In terms of high performance, although less dysprosium is used, gallium must be added, and prices cannot be priced based on dysprosium content.