An Anisotropic Bonded Magnetic Powder and a Preparation Method Thereof

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It provides an anisotropic bond magnetic powder and a method for producing it, wherein the formula of the anisotropic bond magneticpowder is R 1 R 2 TB, of which R1 is a rare earth element including Nd or PrNd, R2is one or two of La, Ce, T is a transition element, B is boron; The preparation method comprises the steps of mixing, heat treatment, high vacuum dehydrogenation toprepare ingot by smelting the parent alloy, preparing rare earth hydride R 1 TBHX, preparing the hydride diffusion source R1R2THx, and finally obtaining the anisotropic bond magnet powder. The present invention uses the hydride of La, Ce as a diffusion source, and hydrogen in the diffusion source can be removed under a relatively low dehydrogen temperature, avoiding the growth of crystal particles under high temperatures, and ensuring the quality of the product.