Tdk Corporation

Yukari Akita

Takashi Suzuki

Yukio Takahashi

Kouichi Kakuda

Ryuichi Wada

Takahiro Sato

Akinori Ohi

Hiroki Choto

Asuka Murai

Shinichi Kondo

Masaki Takahashi

Yusuke Nagai

Hidekazu Sato

Kazuya Tobita

Masahiro Endo

Hiroyuki Tanoue

Takeshi Shibayama

Shusaku Umemoto

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

Provided is a ferrite composition composed of: a main component including 23.0 to 47.0 mole % of Fe compound in terms of FeO, 3.0 to 16.0 mole % of Cu compound in terms of CuO, 4.0 to 39.0 mole % of Zn compound in terms of ZnO, 1.5 to 13.0 mole % of Si compound in terms of SiO, and a residue of Ni compound; and a subcomponent including, with respect to 100 parts by weight of the main component, 0.1 to 8.0 parts by weight of Co compound in terms of CoOand 0.25 to 5.00 parts by weight of Bi compound in terms of BiO.

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.

A glass ceramic composition of the present invention includes a main component composed of a first glass, a second glass, AlO, and SiO. The first glass is SiO&#x2014;KO&#x2014;BObased glass. The second glass is MO&#x2014;SiO&#x2014;AlO&#x2014;BObased glass ('M' is an alkaline-earth metal) and/or CaO&#x2014;SiO&#x2014;AlO&#x2014;ZnO&#x2014;ZrO&#x2014;BObased glass. In case that the total amount of the main component is 100 wt %, the main component contains the second glass of 12 to 30 wt %, the first and second glass of 40 to 56 wt % in total, and further AlOof 7 to 18 wt %.

Glass ceramic composition and coil electronic component

A ferrite composition comprises a main component and a sub component. The main component is comprised of 40.0 to 49.8 mol % iron oxide in terms of FeO, 5.0 to 14.0 mol % copper oxide in terms of CuO, 0 to 32.0 mol % zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The sub component includes 0.5 to 4.0 wt % tin oxide in terms of SnO, 0.10 to 1.00 wt % bismuth oxide in terms of BiO, and 0.21 to 3.00 wt % cobalt oxide in terms of CoO, with respect to the main component.

Growing community of inventors

Tokyo, Japan

Yukari Akita