公开(公告)号：KR1020040036962A

公开(公告)日：2004-05-04

申请号：KR1020020065563

申请日：2002-10-25

Applicant: 한국과학기술연구원

Inventor： 김윤배 ,  정우상 ,  정원용

IPC: H01F1/032

Abstract: PURPOSE: A composition of Pr-Fe-B-based magnetic powders and a fabricating method thereof are provided to enhance a magnetic characteristic by performing an HDDR(Hydrogenation, Disroportionation, Desorption, Recombination) process for fabricating Nd-Fe-B-based powders. CONSTITUTION: A composition of Pr-Fe-B-based magnetic powders includes Pr of 10.6 to 13.0 weight percent, B of 5.5 to 6.5 weight percent, and Fe as the balance. The composition of Pr-Fe-B-based magnetic powders further includes Co of 6 to 35 weight percent. The composition of Pr-Fe-B-based magnetic powders further includes Ga of 0.5 to 1.0 weight percent and Zr of 0.05 to 0.2 weight percent. The composition of Pr-Fe-B-based magnetic powders further includes Dy of 0.1 to 0.5 weight percent.

Abstract translation: 目的：提供一种Pr-Fe-B系磁粉的组成及其制造方法，通过进行用于制造Nd-Fe-B系粉末的HDDR（氢化，歧化，解吸，重组）工艺来提高磁特性 。 构成：Pr-Fe-B系磁粉的组成包括：10.6〜13.0重量％的Pr，5.5〜6.5重量％的B，余量的Fe。 Pr-Fe-B系磁粉的组成还包含6〜35重量％的Co。 Pr-Fe-B系磁粉的组成还包括0.5〜1.0重量％的Ga和0.05〜0.2重量％的Zr。 Pr-Fe-B系磁粉的组成还包含0.1〜0.5重量％的Dy。

公开(公告)号：KR1020020019692A

公开(公告)日：2002-03-13

申请号：KR1020000052688

申请日：2000-09-06

Applicant: 한국과학기술연구원

Inventor： 정우상 ,  김윤배 ,  정원용

IPC: H01F1/053

Abstract: PURPOSE: A method for preparing a rare earth permanent magnet is provided to enhance the magnetic characteristics of a magnet by grinding the raw material powder of a rare earth permanent magnet with a wet method and then coating the surface of the powder to prevent the surface oxidation of the powder. CONSTITUTION: First, raw material powder is obtained by melting and grinding rare earth permanent magnet alloy with desired composition ratio. Then, mixture slurry is obtained by mixing the alloy powder with organic solvent and then grinding the powder. Next, the surface of the alloy powder is coated by adding at least one of oil and organic to the slurry. Then, dried powder is obtained by drying the mixture slurry. Next, a rare earth permanent magnet is formed by sintering the dried powder.

Abstract translation: 目的：提供一种制备稀土永磁体的方法，通过用湿法研磨稀土永磁体的原料粉末，然后涂覆粉末的表面以防止表面氧化，从而提高磁体的磁特性 的粉末。 构成：首先，通过熔融研磨具有所需组成比的稀土永磁体合金来获得原料粉末。 然后，通过将合金粉末与有机溶剂混合，然后研磨粉末获得混合浆料。 接下来，通过向浆料中加入至少一种油和有机物来涂覆合金粉末的表面。 然后，通过干燥混合物浆料获得干燥粉末。 接下来，通过烧结干燥的粉末形成稀土永磁体。