IP Library Granted Patent US 8,647,525
Granted Patent B2
US 8,647,525 · App. 13/048,436 · Granted Feb 11, 2014

Ferrite composition and electronic component

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Quick Facts
Patent No.
US 8,647,525
App. No.
13/048,436
Granted
Feb 11, 2014
Kind
B2
Abstract

A ferrite composition includes a main component having 46.0 to 49.8 mol % of an iron oxide in terms of Fe 2 O 3 , 5.0 to 14.0 mol % of a copper oxide in terms of CuO and 8.0 to 32.0 mol % of a zinc oxide in terms of ZnO, and a remainder of the main component is composed of a nickel oxide; and as subcomponents, with respect to 100 wt % of the main component, 0.5 to 6.0 wt % of a silicon oxide in terms of SiO 2 and 0.01 to 2.0 wt % of a boron oxide in terms of B 2 O 3 . Further, as a subcomponent, 0.01 to 0.17 wt % of potassium oxide in terms of K 2 O or 0.3 to 2.0 wt % of tin oxide in terms of SnO 2 may be included.

Claims (21)

1. A ferrite composition comprising:

a main component including 46.0 to 49.8 mol % of iron oxide in terms of Fe 2 O 3 , 5.0 to 14.0 mol % of copper oxide in terms of CuO and 8.0 to 32.0 mol % of zinc oxide in terms of ZnO, and a remainder of said main component is composed of nickel oxide; and

as subcomponents, with respect to 100 wt % of said main component, 0.5 to 6.0 wt % of silicon oxide in terms of SiO 2 and 0.01 to 2.0 wt % of boron oxide in terms of B 2 O 3 .

2. The ferrite composition as set forth in claim 1 further comprising:

as a subcomponent, 0.01 to 0.17 wt % of potassium oxide in terms of K 2 O with respect to 100 wt % of said main component.

3. The ferrite composition as set forth in claim 1 further comprising:

as a subcomponent, 0.3 to 2.0 wt % of tin oxide in terms of SnO 2 with respect to 100 wt % of said main component.

4. The ferrite composition as set forth in claim 2 further comprising:

as a subcomponent, 0.3 to 2.0 wt % of tin oxide in terms of SnO 2 with respect to 100 wt % of said main component.

5. The ferrite composition as set forth in claim 1 , wherein

an average crystal particle size of a crystal particle included in said ferrite composition is 0.2 to 1.1 μm.

6. The ferrite composition as set forth in claim 2 , wherein

an average crystal particle size of a crystal particle included in said ferrite composition is 0.2 to 1.3 μm.

7. The ferrite composition as set forth in claim 3 , wherein

an average crystal particle size of a crystal particle included in said ferrite composition is 0.2 to 1.1 μm.

8. The ferrite composition as set forth in claim 4 , wherein

an average crystal particle size of a crystal particle included in said ferrite composition is 0.2 to 1.3 μm.

9. An electronic component comprising said ferrite composition as set forth in claim 1 .

10. An electronic component comprising said ferrite composition as set forth in claim 2 .

11. An electronic component comprising said ferrite composition as set forth in claim 3 .

12. An electronic component comprising said ferrite composition as set forth in claim 4 .

Assignments (2)
CHANGE OF ADDRESS Recorded Jun 12, 2013
From: TDK CORPORATION
To: TDK CORPORATION
Reel/Frame 030651/0687 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 15, 2011
From: WADA, RYUICHI; KAWADAHARA, SHOU; TAKAHASHI, YUKIO; MASAOKA, RAITAROU; SUZUKI, TAKASHI; MOMOI, HIROSHI
To: TDK CORPORATION
Reel/Frame 025985/0547 →