RARE-EARTH PERMANENT MAGNETIC POWDER, BONDED MAGNET, AND DEVICE COMPRISING THE BONDED MAGNET

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A rare-earth permanent magnetic powder, a bonded magnet, and a device comprising the bonded magnet are provided. The rare-earth permanent magnetic powder is mainly composed of 7-12at% of Sm, 0.1-1.5at% of M, 10-15at% of N, 0.1-1.5at% of Si, and Fe as the balance, wherein M is at least one element selected from the group consisting of Be, Cr, Al, Ti, Ga, Nb, Zr, Ta, Mo, and V, and the main phase of the rare-earth permanent magnetic powder is of TbCu7 structure. Element Si is added into the rare-earth permanent magnetic powder for increasing the ability of SmFe alloy to from amorphous sturcture, and for increasing the wettability of the alloy liquid together with the addition of element M in a certain content, which enables the alloy liquid prone to be injected out of a melting device. The average diameter of the rare-earth permanent magnetic powder is in the range of 10-100μm, and the rare-earth permanent magnetic powder is composed of nanometer crystal with average grain size of 10-120nm or amorphous structure.