Extremely heat-resistant rare-earth permanent magnet material, its production method and magnet containing the same

摘要

There is provided an extremely heat-resistant rare-earth permanent magnet material, a manufacturing method thereof, and a magnet including the same. An atomic percent composition of a rare earth permanent magnet material is as follows: SmRFeMN, wherein R is at least one of Zr and Hf, M is at least one of Co, Ti, Nb, Cr, V, Mo, Si, Ga, Ni, Mn and Al is, x + a is 7-10%, a is 0-1.5%, y is 0-5%, and z is 10-14%. The provided rare earth permanent magnet material has excellent temperature resistance and corrosion resistance, is conducive to further miniaturization of a device, and is conducive to use of the device in a special environment; the manufacturing method of the provided rare earth permanent magnet material has a simple process and a low cost; and the practical value of the prepared isotropic samarium-iron-nitrogen magnet material can be improved.