EP0374847A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fe-based soft magnetic alloy
Assignee: Toshiba Corp
•
Filing: 1989-12-19
•
Granted: —
•
Expires: 2009-12-19
Abstract
Abstract An Fe-based soft magnetic alloy essentially consisting of an Fe-based alloy including fine crystal grains used for such as a magnetic core. An average size of the fine crystal grains is controlled to 300Å (30 nm) or less. Each of the fine crystal grains is composed of a body-centered cubic phase at least partially including a super lattice. This alloy has a high saturation flux density and excellent soft magnetic characteristics such as a low iron loss and a high magnetic permeability.
Inventors
- 👤 Takao Sawa
- 👤 Masami Okamura
- 👤 Yumiko Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 23:19
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; C; C22; C22C; C22C45/00; C22C45/02; H01F1/147; H01F1/153; H01F1/15308
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
An Fe-based soft magnetic alloy essentially consisting of an Fe-based aloy, characterized in that said Fe-based alloy includes fine crystal grains having an average size of 300Å (30 nm) or less and each of said fine crystal grains is composed of a body-centered cubic phase at least partially including a super lattice.
Claim 2
Dependent Claim
52 words
An Fe-based soft magnetic alloy essentially consisting of an Fe-based aloy, characterized in that said Fe-based alloy includes fine crystal grains having an average size of 300Å (30 nm) or less and each of said fine crystal grains is composed of a body-centered cubic phase at least partially including a super lattice.
Claim 3
Dependent Claim
155 words
An Fe-based soft magnetic alloy according to claim 1, wherein said Fe-based alloy having the composition represented by the general formula: Fe a Cu b M c M′ d M˝ e Si f B g , wherein M is at least one element selected from the group consisting of IVa, Va, VIa family elements of the periodic table and the rare earth elements, M′ is at least one element selected from the group consisting of Mn, Al, Ge and the Platinum elements, and M˝ is Co and/or Ni, wherein coefficients of a, b, c, d, e, f and g respectively satisfy a + b + c + d + e + f + g = 100 (atomic%), 0.01 ≦ b ≦ 8, 0.01 ≦ c ≦ 10, 0 ≦ d ≦ 10, 0 ≦ e ≦ 20, 10 ≦ f ≦ 25, 3 ≦ g ≦ 12 and 17 ≦ f + g ≦ 30.
Claim 4
Dependent Claim
22 words
An Fe-based soft magnetic alloy according to claim 2, wherein a ratio of Si content to B content is 1 and more.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.