Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1998-12-22
2000-06-20
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
252 6254, H01F 702
Patent
active
060782374
ABSTRACT:
Disclosed is a rare earth-based, magnetically anisotropic permanent magnet material consisting of a rare earth element, e.g., neodymium or praseodymium, iron optional in combination with cobalt and boron and having excellent magnetic properties by virtue of the magnetic coupling between the magnetically hard and soft phases. The magnet material has a structure consisting of crystalline particles of, e.g., Nd.sub.2 Fe.sub.14 B, having a particle diameter of 1 .mu.m or larger and fine crystals of iron of submicron size in a rod-shaped or platelet form precipitated within each crystalline particle of Nd.sub.2 Fe.sub.14 B. This magnet material can be prepared by several different methods including, for example, a solid phase reaction of an intermetallic compound of Nd.sub.2 Fe.sub.17 with boron to effect a double decomposition reaction producing Nd.sub.2 Fe.sub.14 B and iron.
REFERENCES:
patent: 5411608 (1995-05-01), Hazelton et al.
patent: 5595608 (1997-01-01), Takebuchi et al.
patent: 5597425 (1997-01-01), Akioka et al.
patent: 5725792 (1998-03-01), Panchanathan
W.C. Chang et al., J. Appl. Phys., 79(8), 4843-4845 (1996). (No Month).
Patent Abstracts of Japan, 11(212) (E-522) (abstract of JP 62-035602 (1987) (No Month).
Ito Masaru
Minowa Takehisa
Nomura Tadao
Ohashi Ken
Tawara Yoshio
Donovan Lincoln
Shin-Etsu Chemical Co. , Ltd.
LandOfFree
Rare earth-based permanent magnet material and method for the pr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rare earth-based permanent magnet material and method for the pr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rare earth-based permanent magnet material and method for the pr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1856458