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US5047296A
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Composite magnetic material and its production process
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1988-09-08
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Granted: 1991-09-10
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Expires: 2008-09-08
Abstract
Abstract The composite material comprises an alternation of amorphous magnetic material films based on cobalt, niobium and zirconium and electrically insulating material films (4), each magnetic film being formed from several blocks (6) separated from one another by electrically insulating joints (8), the total volume (Vp) occupied by the magnetic blocks and the total volume (Vj) occupied by the insulating joints being such that the ratio (Vp/Vj) varies between 10 and 50. This material can be used in a wide range of applications with electromagnetic fields having a frequency between 50 MHz and several GHz.
Inventors
- 👤 Bernard Miltenberger
- 👤 Jean M. Sajer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:00
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; B; B82; B82Y; B82Y25/00; B82Y40/00; H01F10/10; H01F10/12; H01F10/13; H01F10/132; H01F10/32; H01F10/324; H01F10/3254; H01F41/00; H01F41/14; H01F41/30; H01F41/302; H01F41/308; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/11; Y10T428/1157
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
70 words
Composite magnetic material, comprising an alternation of magnetic material films (2) and electrically insulating materials (4), each magnetic material film (2) being formed by several magnetic blocks (6) separated from one another by electrically insulating joints (8, 8a), the total volume Vp occupied by the blocks and the total volume Vj occupied by the joints and the insulating films being such that the ratio Vp/Vj varies from 10 to 50.
Claim 2
Dependent Claim
70 words
Composite magnetic material, comprising an alternation of magnetic material films (2) and electrically insulating materials (4), each magnetic material film (2) being formed by several magnetic blocks (6) separated from one another by electrically insulating joints (8, 8a), the total volume Vp occupied by the blocks and the total volume Vj occupied by the joints and the insulating films being such that the ratio Vp/Vj varies from 10 to 50.
Claim 3
Dependent Claim
27 words
Composite material according to claim 1, wherein the magnetic material is an amorphous ferromagnetic material having a magnetic permeability at least three times greater than soft iron.
Claim 4
Dependent Claim
26 words
Composite material according to claim 1, wherein the magnetic material is an alloy of cobalt and at least one element chosen from among zirconium and niobium.
Claim 5
Dependent Claim
23 words
Composite material according to claim 1, wherein the magnetic material is of formula Co x Nb y Zr z with 80≦x≦95 and y+z=100-x.
Claim 6
Dependent Claim
21 words
Composite material according to claim 1, wherein the magnetic material is of formula Co 87 Nb 11 .5 Zr 1 .5.
Claim 7
Dependent Claim
28 words
Composite material according to claim 1, wherein the magnetic films (2) have magnetic moments oriented in the same direction parallel to the plane (X, Y) of the films.
Claim 8
Dependent Claim
19 words
Composite material according to claim 1, wherein the magnetic films (2) have a thickness between 200 and 400 nm.
Claim 9
Dependent Claim
20 words
Composite material according to claim 1, wherein the insulating films (4) have a thickness between 10 nm and 10 μm.
Claim 10
Dependent Claim
21 words
Composite material according to claim 1, wherein the insulating joints (8a) are constituted by an air layer or an oxide layer.
Claim 11
Dependent Claim
21 words
Composite material according to claim 1, wherein a continuous support (12) is provided as the final film of said composite material.
Claim 12
Dependent Claim
36 words
Composite material according to claim 1, wherein the insulating joint has a length value ι and the magnetic block has a side value L, the ratio of ι/L varying from 10 -2 to 10 -4 .
References Cited (Backward Citations)
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Cited
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US3540047A
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US4608297A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |