Global Patent Index - EP 0844628 B1

EP 0844628 B1 2001-12-05 - Process for producing a magnetic core of nanocristalline soft magnetic material

Title (en)

Process for producing a magnetic core of nanocristalline soft magnetic material

Title (de)

Herstellungsverfahren eines Magnetkernes aus weichmagnetischem nanokristallinen Material

Title (fr)

Procédé de fabrication d'un noyau magnétique en matériau magnétique doux nanocristallin

Publication

EP 0844628 B1 (FR)

Application

EP 97402396 A

Priority

FR 9612996 A

Abstract (en)

[origin: JPH10130797A] PROBLEM TO BE SOLVED: To obtain a nanocrystalline material combining excellent magnetic transitivity and a wide hysteresis loop by producing a core stock from an amorphous ribbon composed of an iron base soft magnetic alloy and executing annealing for a specified temp. holding time in the magnetic field. SOLUTION: An amorphous ribbon is produced from an iron base soft magnetic alloy, and the annealing temp. Tm to form the maximum magnetic transitivity of this ribbon is obtd. At least one core material is produced form the ribbon, and annealing treatment is executed at the temp. T of Tm+10 deg.C to Tm+50 deg.C for the temp. holding time (t) of 0.1 to 10hr for at least one time to form nanocrystal lines. At this time, at least one time of the annealing operation is executed preferably in the magnetic field. The composition of the soft magnetic alloy is composed of, by weight, >=60% Fe, 0.1 to 3% Cu, 0 to 25% B, 0 to 30% Si and one or more kinds selected from Nb, W, Ta, Zr, Hf, Ti and Mo by 0.1 to 30 atomic %, and 5%<=Si+B<=30% is satisfied.

IPC 1-7 (main, further and additional classification)

H01F 41/02; H01F 1/153

IPC 8 full level (invention and additional information)

C22C 38/00 (2006.01); C22C 38/16 (2006.01); H01F 1/153 (2006.01); H01F 27/24 (2006.01); H01F 41/02 (2006.01)

CPC (invention and additional information)

H01F 41/0213 (2013.01); H01F 1/15333 (2013.01); H01F 1/15341 (2013.01); Y10S 977/838 (2013.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

FR 2755292 A1 19980430; FR 2755292 B1 19981120; AT 210332 T 20011215; AU 4102997 A 19980430; AU 715096 B2 20000113; CN 1134033 C 20040107; CN 1188317 A 19980722; CZ 293222 B6 20040317; CZ 9703372 A3 19990113; DE 69708828 D1 20020117; DE 69708828 T2 20020620; EP 0844628 A1 19980527; EP 0844628 B1 20011205; ES 2166516 T3 20020416; HK 1011578 A1 20041029; HU 221412 B1 20020928; HU 9701672 A2 19990628; HU 9701672 A3 20020328; HU 9701672 D0 19971229; JP H10130797 A 19980519; PL 184054 B1 20020830; PL 322808 A1 19980427; SK 144597 A3 19980506; SK 284075 B6 20040908; TR 199701235 A2 19991021; TR 199701235 A3 19991021; TW 354842 B 19990321; US 5922143 A 19990713; ZA 9709359 B 19980512