Holmium-contained Nd-Fe-B rare earth permanent magnetic material and manufacturing method thereof

A rare earth permanent magnet and neodymium iron boron technology, applied in the field of magnetic materials, can solve problems such as unspecified Ho, and achieve the effect of reducing costs
CN101404196AInactive Publication Date: 2009-04-08ZHEJIANG SHENGHUA MAGNETIC MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG SHENGHUA MAGNETIC MATERIALS
Publication Date
2009-04-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an Nd-Fe-B rare earth permanent magnet material containing Ho and a preparation method thereof; the composition of the Nd-Fe-B rare earth permanent magnet material containing Ho comprises Re Alpha Ho Beta B Gama MxNyFe 1-Alpha-Beta-Gama-x-y; wherein, Re is rare earth element and comprises Nd or Nd as well as one or more elements out of La, Ce, Pr, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and Sc; M is addition element and comprises Co and Cu; N is addition element and comprises one or more elements out of Al, Ga, Nb, Zr, Ti and Sn; Alpha, Beta, Gama, x and y are respectively weight percentage of all elements; Fe is iron and unavoidable impurities; wherein, Alpha is not more than 35% and not less than 29%; Beta is not less than 0.05% and not more than 0.5%; Gama is not more than 1.20% and not less than 0.95%; x is not more than 10% and is not less than 0; y is not more than 1.50% and not less than 0. The preparation method adopts the continuous procedures such as smelting, casting, crushing, forming and sintering to prepare a magnet. The Hcj of the Nd-Fe-B rare earth permanent magnet material is improved and the production cost thereof is reduced after Ho is added in the Nd-Fe-B rare earth permanent magnet material.
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Description

technical field

[0001] The invention relates to the technical field of magnetic materials, in particular, the invention relates to a NdFeB rare earth permanent magnet material added with holmium and a manufacturing method thereof. Background technique

[0002] Rare earth NdFeB permanent magnet material is the third generation of permanent magnet material developed in the early 1980s. Because of its extremely strong magnetism, it is commonly known as the "permanent magnet king". It can pick up objects equivalent to 1000 times its own weight, and has excellent magnetic characteristics and energy-saving, material-saving, and environmental protection effects. It is a high-performance material that other permanent magnet materials cannot match. As an important functional material, rare earth permanent magnet materials have been widely used in the fields of energy, transportation, machinery, medical treatment, computers, and home appliances, and have penetrated into all aspects of...

Claims

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