Neodymium-iron-boron permanent magnet and preparation method and use thereof

US11705256B2 · kind B2 · utility

Assignee

• Baotou Jinshan Magnetic Material Co., Ltd. · CN

Inventors

• Feng Xia · Vienna, US
• Yu-Kai Wang · 龙王头村, CN
• Yanli Li · Los Angeles, US
• Yonghuai Feng · 翁根苏木, CN
• Chunguang Liu · Fremont, US
• Haiyuan Zhang · 翁根苏木, CN
• Jixiang Liu · Eugene, US
• Manyou Su · 翁根苏木, CN
• Gazhen Liu · 翁根苏木, CN

Key dates

• Filing date: Jul 21, 2021
• Grant date: Jul 18, 2023
• Expiry date: Jul 21, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C2202/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A neodymium-iron-boron permanent magnet, a preparation method and use thereof are disclosed. The neodymium-iron-boron permanent magnet has a composition represented by formula I: [mHR(1−m) (Pr25Nd75)]x(Fe100-a-b-c-dMaGabIncSnd)100-x-yBy formula I; where a is 0.995-3.493, b is 0.114-0.375, c is 0.028-0.125, d is 0.022-0.100; x is 29.05-30.94, y is 0.866-1.000; m is 0.02-0.05; HR is Dy and/or Tb; M is at least one selected from the group consisting of Co, Cu, Ti, Al, Nb, Zr, Ni, W and Mo.