Rare earth permanent magnet material and raw material composition,preparation method therefor and use thereof

US12198840B2 · kind B2 · utility

Assignee

• FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd. · CN

Inventors

• Qin Lan · Fujian, CN
• Jiaying Huang · Fujian, CN
• Zhixing Xie · Fujian, CN
• Weiguo Mou · Fujian, CN
• Qingfang HUANG · Fujian, CN

Key dates

• Filing date: Jul 22, 2020
• Grant date: Jan 14, 2025
• Expiry date: Jun 13, 2041

Classification

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

Abstract

A rare earth permanent magnet material and a raw Material composition, a preparation method therefor and use thereof. The rare earth permanent magnet material comprises the following components in percentage by mass: 29.0-32.0 wt. % of R, where R comprises RH, and the content of RH is greater than 1 wt. %; 0.30-0.50 wt. % of Cu (not including 0.50 wt. %); 0.10-1.0 wt. % of Co; 0.05-0.20 wt. % of Ti; 0.92-0.98 wt. % of B; and the remainder being Fe and unavoidable impurities; wherein R is a rare-earth element and at least comprises Nd; and RH is a heavy rare-earth element and at least comprises Tb. The R-T-B system permanent magnet material exhibits excellent performance, wherein Br≥14.30 kGs, and Hcj≥24.1 kOe. The invention can synchronously improve Br and Hcj.