Highly thermostable rare-earth permanent magnetic material, preparation method thereof and magnet c

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The present invention provides a high thermal stability rare-earth permanent magnet material, a manufacturing method thereof, and a magnet containing the same. According to the present invention, a composition of the rare-earth permanent magnet material is represented as Sm_xR_aFe_(100-x-y-z-a)M_yN_z based on atomic percent, wherein R is either or both of Zr and Hf, M is at least one among Co, Ti, Nb, Cr, V, Mo, Si, Ga, Ni, Mn, and Al, x+a is 7 to 10%, a is 0 to 1.5%, y is 0 to 5%, and z is 10 to 14%. The rare-earth permanent magnet material of the present invention has excellent temperature resistant corrosion resistance, and is advantageous in miniaturization of a device and use of the device in a special environment. Moreover, a manufacturing method thereof simplifies a process, reduces a prime cost, and increases a practical value of the manufactured isotropic Sm-Fe-N magnet material.COPYRIGHT KIPO 2018