EP 0299498 A1 19890118 - Magnetic core and method of producing same.
Title (en)
Magnetic core and method of producing same.
Title (de)
Magnetkern und Verfahren zur Herstellung.
Title (fr)
Noyau magnétique et procédé pour sa fabrication.
Publication
Application
Priority
- JP 173188 A 19880107
- JP 17567387 A 19870714
- JP 18834487 A 19870728
- JP 18834587 A 19870728
Abstract (en)
A magnetic core made of an Fe-base soft magnetic alloy consisting essentially of Fe, Cu and M wherein M is at least one of the elements, Nb, W, Ta, Zr, Hf, Ti and Mo, at least 50% of the alloy structure being occupied by fine crystalline particles, and the change ratio X of the effective permeability with time of said magnetic core being o.3 or less, where X is defined by the following formula: X = 1 - mu b / mu a wherein mu a is the effective permeability at 1 kHz, and mu b is the effective permeability at 1 kHz after heating at 100 DEG C for 1000 hours in the air.
IPC 1-7
IPC 8 full level
C22C 38/00 (2006.01); C22C 45/02 (2006.01); H01F 1/14 (2006.01); H01F 1/153 (2006.01); H01F 27/24 (2006.01); H01F 38/42 (2006.01); H01F 41/02 (2006.01)
CPC (source: EP KR)
C22C 45/02 (2013.01 - EP); H01F 1/12 (2013.01 - KR); H01F 1/14 (2013.01 - KR); H01F 1/15308 (2013.01 - EP); H01F 27/24 (2013.01 - EP); H01F 41/0226 (2013.01 - EP); H01F 2029/143 (2013.01 - EP)
Citation (search report)
- US 4558297 A 19851210 - SHIGETA MASAO [JP], et al
- GB 2102212 A 19830126 - TELCON METALS LTD [GB]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0299498 A1 19890118; EP 0299498 B1 19930929; CA 1341105 C 20001003; DE 3884491 D1 19931104; DE 3884491 T2 19940217; JP H0277105 A 19900316; JP H0777167 B2 19950816; KR 890002910 A 19890411; KR 910002375 B1 19910420
DOCDB simple family (application)
EP 88111364 A 19880714; CA 571968 A 19880714; DE 3884491 T 19880714; JP 17546488 A 19880714; KR 880008850 A 19880714