公开(公告)号：US3903228A

公开(公告)日：1975-09-02

申请号：US22920072

申请日：1972-02-24

Applicant: MINNESOTA MINING & MFG

Inventor： RIEDL KENNETH M ,  NELSON KARL E

IPC: C04B35/26 ,  C08K3/22 ,  H01F1/11 ,  H01F1/117 ,  B24D3/02

CPC classification number: H01F1/117 ,  C04B35/2683 ,  C08K3/22 ,  C08K2201/01 ,  H01F1/11 ,  C08L21/00

Abstract: Process for making barium ferrite particles which are especially adapted to mechanical orientation in admixture with a workable nonmagnetic matrix material to provide flexible magnets of extraordinarily high magnetic values. Starting with acicular alpha-Fe2O3 particles, BaCO3, a fluxing agent such as NaF and a lead compound such as PbO, magnetic particles are obtained which provide, when oriented in a rubber matrix, permanent magnet material having a maximum energy product of at least 1.4 X 106 gauss-oersteds.

Abstract translation: 制造钡铁氧体颗粒的方法，其特别适用于与可使用的非磁性基体材料混合的机械取向，以提供特别高的磁性值的柔性磁体。 从针状α-Fe2O3颗粒开始，获得BaCO3，助熔剂如NaF和铅化合物如PbO，磁性颗粒，当在橡胶基质中定向时，其具有至少为1.4的最大能量积的永磁体材料 x 106高斯奥斯特。