The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2020
Filed:
Apr. 10, 2017
Beijing Zhong KE San Huan Hi-tech Co., Ltd., Beijing, CN;
Guoan Chen, Beijing, CN;
Yugang Zhao, Beijing, CN;
Jin Zhang, Beijing, CN;
E Niu, Beijing, CN;
Haojie Wang, Beijing, CN;
Xuanzhang Ye, Beijing, CN;
Beijing Zhong Ke San Huan Hi-Tech Co., Ltd., Beijing, CN;
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.