公开(公告)号：US10210972B2

公开(公告)日：2019-02-19

申请号：US15567957

申请日：2016-03-08

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Ming Yue ,  Yuxia Yin ,  Weiqiang Liu ,  Ruijin Hu ,  Dongtao Zhang ,  Chenglin Li

IPC: B22F1/00 ,  B22F3/03 ,  H01F7/02 ,  H01F1/057 ,  H01F41/02 ,  C22C33/02 ,  C22C38/00

Abstract: This patent invents a heat-resistant isotropic bonded NdFeB magnet and its preparation technology, belonging to the field of magnetic materials. In present invention, isotropic NdFeB magnetic powders is used as magnetic material, sodium silicate is used as principal binder, and epoxy resin is used as auxiliary binder to prepare heat-resistant isotropic bonded NdFeB magnets. The prepared magnets have greatly increased heat resistance to stand an operating temperature of 200° C., and have advantages of penetration and corrosion resistance. The invented heat-resistant isotropic bonded NdFeB magnets feature good magnetic properties and high operating temperature. During the preparation process, it has the advantage of simple equipment, easy operation, low cost. The technology is easy to large scale production, and has high economic value and huge application prospect in the field of permanent magnetic materials.