公开(公告)号：DE59200858D1

公开(公告)日：1995-01-12

申请号：DE59200858

申请日：1992-02-28

Applicant: BASF AG

Inventor： RICHTER HANS ,  SCHWAB EKKEHARD ,  JAKUSCH HELMUT ,  HIBST HARTMUT ,  GRAU WERNER ,  KNELLER ECKHART ,  HAWIG REINHARDT

IPC: C21D6/00 ,  C22C38/00 ,  G11B5/64 ,  G11B5/706 ,  H01F1/00 ,  H01F1/03 ,  H01F1/053 ,  H01F1/057 ,  H01F10/12 ,  H01F10/13 ,  H01F41/02 ,  H01F41/14 ,  H01Q17/00 ,  H02K1/02 ,  H05K9/00

公开(公告)号：DE4120663A1

公开(公告)日：1992-12-24

申请号：DE4120663

申请日：1991-06-22

Applicant: BASF AG

Inventor： RICHTER HANS JUERGEN DR ,  SCHWAB EKKEHARD DR ,  JAKUSCH HELMUT DR ,  HIBST HARTMUT DR ,  GRAU WERNER DR ,  KNELLER ECKHART PROF DR ,  HAWIG REINHARDT

IPC: G11B5/706 ,  H01F1/03 ,  H01F1/057 ,  H01Q17/00 ,  H02K1/02

Abstract: A magnetisable material consists of at least two ferro- and/or ferrimagnetic phases which are magnetically coupled to each other by magnetic exchange coupling. At least one of the phases is a hard magnetic phase and at least one of the phases is a soft magnetic phase. The vol. percentage of the soft magnetic phase is at least 30%. At least 65% of the original saturation remanence is obtd. again after prior magnetic saturation in a direction corresp. to the application of an opposite magnetic field which is the same as the coercive field strength of the magnetic material, and after removing the field. The saturation remanence is at least 50% of the saturation magnetisation. The material is mfd. by spraying a melt of rare earth metals, Fe, B, a transition metal and Si on to a rotating metal roll in an inert atmos., and annealing the flakes produced at 670-780 deg.C to give the desired ratio of hard- to soft magnetic phases. Pref. an alloy of compsn. RExFeyBzSiuTv is used as the magnetic material, where RE is one or more rare earth metals and/or Y, Zr and Hf, and T is one or more transition metal with a body-centred cubic structure, and where x is not greater than 10 atom %, y is not greater than 85 atom %, z is not greater than 25 atom %, u is not greater than 10 atom %, and v is not greater than 10 atom %. Up to 10 atom % Fe may be replaced by Ni and/or Co. The soft magnetic phases comprises alpha-Fe and Fe3B, and the hard magnetic phase comprises Nd2Fe14B.

公开(公告)号：DE4107499A1

公开(公告)日：1992-09-10

申请号：DE4107499

申请日：1991-03-08

Applicant: BASF AG

Inventor： RICHTER HANS JUERGEN DR ,  SCHWAB EKKEHARD DR ,  JAKUSCH HELMUT DR ,  HIBST HARTMUT DR ,  GRAU WERNER DR ,  KNELLER ECKHART PROF DR ,  HAWIG REINHARDT

IPC: G11B5/706 ,  H01F1/03 ,  H01F1/057 ,  H01Q17/00 ,  H02K1/02

Abstract: A ferromagnetic material is based upon an exhange coupling mechanism in which a hard magnetic phase (1) and a soft magnetic phase (20 are combined. While hard magnetic materials have a high anisotropy and a relatively low magnetic saturation, the soft materials exhibit the opposite effect. By coupling the materials an optimum is achieved. The volume of the soft magentic material is selected to be greater than that of the hard magnetic material. After removing a magnetic field from the material the remnant field effect is such that MRev is greater than 2.5. The material is an alloy of REx.Fey.Bz.Vu.Siv, where REx is a rare erth material. USE/ADVANTAGE - High performance material for permanent magnets, broad band microwave absorbers, magnetic recording material.

公开(公告)号：AT114866T

公开(公告)日：1994-12-15

申请号：AT92905567

申请日：1992-02-28

Applicant: BASF AG

Inventor： RICHTER HANS JUERGEN ,  SCHWAB EKKEHARD ,  JAKUSCH HELMUT ,  HIBST HARTMUT ,  GRAU WERNER ,  KNELLER ECKHART ,  HAWIG REINHARDT

IPC: C21D6/00 ,  C22C38/00 ,  G11B5/64 ,  G11B5/706 ,  H01F1/00 ,  H01F1/03 ,  H01F1/053 ,  H01F1/057 ,  H01F10/12 ,  H01F10/13 ,  H01F41/02 ,  H01F41/14 ,  H01Q17/00 ,  H02K1/02 ,  H05K9/00