Invention Grant
- Patent Title: Method for preparing an R-T-B permanent magnet
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Application No.: US15484006Application Date: 2017-04-10
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Publication No.: US10714245B2Publication Date: 2020-07-14
- Inventor: Guoan Chen , Yugang Zhao , Jin Zhang , E Niu , Haojie Wang , Xuanzhang Ye
- Applicant: BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD.
- Applicant Address: CN Beijing
- Assignee: Beijing Zhong Ke San Huan Hi-Tech Co., Ltd.
- Current Assignee: Beijing Zhong Ke San Huan Hi-Tech Co., Ltd.
- Current Assignee Address: CN Beijing
- Agency: Fish & Richardson P.C.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@6815f56b
- Main IPC: H01F1/053
- IPC: H01F1/053 ; H01F41/02 ; H01F1/057

Abstract:
Disclosed herein is a method for manufacturing an R-T-B permanent magnet and the magnet made with the method. The method may include preparation of strip pieces by melting and casting, preparing coarse powder by hydrogen decrepitation of the strip pieces; milling the powder into fine powder; pressing the fine powder is pressed to form a compact, pre-sintering the compact in vacuum or inert gas, machining the pre-sintered block to a desired shape; and dispersing the heavy rare earth compound powder into an organic solvent to prepare a slurry and a second sintering step.
Public/Granted literature
- US20170221615A1 METHOD FOR PREPARING AN R-T-B PERMANENT MAGNET Public/Granted day:2017-08-03
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