Tdk Corporation

Hiroki Choto

Takashi Suzuki

Shinichi Kondo

Masaki Takahashi

Yukio Takahashi

Kouichi Kakuda

Masahiro Endo

Ryuichi Wada

Takeshi Shibayama

Yuya Oshima

Akinori Ohi

Yukari Akita

Takahiro Sato

Asuka Murai

A ferrite composition composed of a main component including 26 to 46 mol % of an iron oxide in terms of FeO, 4 to 14 mol % of a copper oxide in terms of CuO, 0 to 26 mol % of a zinc oxide in terms of ZnO, and a residue of 40.0 mol % or more of a nickel oxide in terms of NiO. The ferrite composition, with respect to 100 parts by weight of the main component, is also composed of a subcomponent including 0.8 to 10.0 parts by weight of a silicon compound in terms of SiO, 1.0 to 15.0 parts by weight of a cobalt compound in terms of CoO, and 0.7 to 30.0 parts by weight of a bismuth compound in terms of BiO. A value of the cobalt compound content in terms of CoOdivided by the silicon compound content in terms of SiOis 0.4 to 5.5.

Ferrite composition and electronic component

A ferrite composition comprises a main component and a sub component. The main component is comprised of 25.0 to 49.8 mol % iron oxide in terms of FeO, 5.0 to 14.0 mol % copper oxide in terms of CuO, 0 to 40.0 mol % zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The sub component includes 0.2 to 5.0 wt % silicon oxide in terms of SiO, 0.10 to 3.00 wt % bismuth oxide in terms of BiO, and 0.10 to 3.00 wt % cobalt oxide in terms of CoO, with respect to the main component.

Provided is a composite ferrite composition including a magnetic substance material and a nonmagnetic substance material. The magnetic substance material is Ni&#x2014;Cu&#x2014;Zn based ferrite. The nonmagnetic substance material comprises a low dielectric constant nonmagnetic substance material, which is shown by a general formula: a(bZnO.cCuO).SiOand satisfies a=1.5 to 2.4, b=0.85 to 0.98, c=0.02 to 0.15, and b+c=1.00 in said general formula, and a bismuth oxide. A mixing ratio of the magnetic substance material and the low dielectric constant nonmagnetic substance material is 80 wt %:20 wt % to 10 wt %:90 wt %.

Composite ferrite composition and electronic component

A composite ferrite composition comprises a magnetic material and a non-magnetic material. A mixing ratio of said magnetic material and said non-magnetic material is 20 wt %:80 wt % to 80 wt %:20 wt %. Ni&#x2014;Cu&#x2014;Zn based ferrite is used as the magnetic material. Oxides of Zn, Cu, and Si are at least included in a main component of said non-magnetic material. Borosilicate glass is included in a subcomponent of said non-magnetic material.

Composite ferrite composition and electronic device

Growing community of inventors

Tokyo, Japan

Hiroki Choto