Ferrite composition and multilayer electronic component

Patent metadata

Field	Value
Publication number	US-11282622-B2
Application number	US-201916727553-A
Country	US
Kind code	B2
Filing date	Dec 26, 2019
Priority date	Jan 29, 2019
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A ferrite composition includes a main component and a sub-component. The main component includes 10.0 to 38.0 mol % of a Fe compound in terms of Fe2O3, 3.0 to 11.0 mol % of a Cu compound in terms of CuO, 39.0 to 80.0 mol % (excluding 39.0 mol %) of a Zn compound in terms of ZnO, and a balance of a Ni compound. The sub-component includes 10.0 to 23.0 parts by weight of a Si compound in terms of SiO2, 0 to 3.0 parts by weight (including 0 parts by weight) of a Co compound in terms of Co3O4, and 0.1 to 3.0 parts by weight of a Bi compound in terms of Bi2O3 with respect to 100 parts by weight of the main component.

First claim

What is claimed is:

1. A ferrite composition comprising a main component and a sub-component, wherein the main component includes 10.0 to 38.0 mol % of a Fe compound in terms of Fe 2 O 3 , 3.0 to 11.0 mol % of a Cu compound in terms of CuO, 46.2 to 61.8 mol % of a Zn compound in terms of ZnO, and a balance of a Ni compound, and
the sub-component includes 10.0 to 23.0 parts by weight of a Si compound in terms of SiO 2 , 0 to 3.0 parts by weight (including 0 parts by weight) of a Co compound in terms of Co 3 O 4 , and 0.1 to 3.0 parts by weight of a Bi compound in terms of Bi 2 O 3 with respect to 100 parts by weight of the main component.

2. The ferrite composition according to claim 1 , the sub-component includes 0.1 to 1.0 parts by weight of a Co compound in terms of Co 3 O 4 .

3. The ferrite composition according to claim 1 , comprising a main phase composed of spinel ferrite, a first sub-phase including a Zn 2 SiO 4 phase, and a grain boundary phase including a SiO 2 phase.

4. The ferrite composition according to claim 3 , further comprising a second sub-phase composed of SiO 2 phase.

5. A multilayer electronic component comprising a coil conductor and ceramic layers, wherein the ceramic layers are composed of the ferrite composition according to claim 1 .

Assignees

• Tdk Corp

Inventors

• Shibayama Takeshi
• Suzuki Takashi
• Sato Takahiro
• Komorita Kenji
• Suzuki Tatsuro
• Takahashi Yukio
• Tanoue Hiroyuki
• Ito Yasuhiro

Classifications

• C04B35/2666

  Other ferrites containing nickel, copper or cobalt · CPC title

• C04B2235/3284

  Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof · CPC title

• C04B2235/3298

  Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate · CPC title

• C04B35/265 Primary

  Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt · CPC title

• C04B2235/602

  Making the green bodies or pre-forms by moulding · CPC title