| 摘要 |
995,375. Magnetic structures. A. W. COCHARDT. Dec. 6, 1963 [Dec. 11, 1962], No. 48315/63. Drawings to Specification. Heading H1H. Anisotropic permanent magnets are made by preparing a green flat body by compacting finely divided particles in a magnetic field (the field being parallel to the compacting pressure and perpendicular to the major surfaces of the body), subdividing the body into a multitude of members, sintering either before or after the subdivision, and magnetizing in the direction of orientation. The magnetic material may be barium, strontium or lead ferrites of magneto plumbite structure. The structure may be partially sintered before cutting. With the invention less power is required in the aligning field per magnet than when magnets are prepared individually, and individual magnets have a higher degree of anisotropy because the magnetizing field will be straighter, except at edges of the structure, and these edge portions may be discarded. Specification 995,374 is referred to. |
