Modified Sintered Neodymium-iron-boron Permanent Magnetic Material and Preparation Method Therefor
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United States of America
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Apr 10, 2025
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Nov 30, 2022
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Nov 30, 2022
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Abstract
The disclosure provides a modified sintered neodymium-iron-boron permanent magnetic material and a preparation method therefor. The modified sintered neodymium-iron-boron permanent magnetic material includes a first alloy, the first alloy represented by formula (I): (Pr0.25Nd0.75)a(LRE)bTMcFe100%-a-b-c-dBd (I), where LRE is a rare earth element, selected from one or more of elements Gd, Y, and Ce, and at least includes the element Gd, TM is selected from one or more of elements Al, Cu, Co, Ga, Nb, Zr, and Ti, a is 5% to 20%, b is 13% to 28%, c is 0.4% to 5.5%, and d is 0.9% to 1%. The modified sintered neodymium-iron-boron permanent magnetic material provided by the disclosure has a maximum magnetic energy product of 5 MGOe to 30 MGOe, residual magnetism of 6 kGs to 11 kGs, and an intrinsic coercive force of 5 kOe to 11 kOe, and is excellent in high-temperature resistance and low in cost.
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