公开(公告)号：US20200243239A1

公开(公告)日：2020-07-30

申请号：US16727553

申请日：2019-12-26

Applicant: TDK CORPORATION

Inventor： Takeshi SHIBAYAMA ,  Takashi SUZUKI ,  Takahiro SATO ,  Kenji KOMORITA ,  Tatsuro SUZUKI ,  Yukio TAKAHASHI ,  Hiroyuki TANOUE ,  Yasuhiro ITO

IPC: H01F1/34 ,  C04B35/26

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.

公开(公告)号：US20190221344A1

公开(公告)日：2019-07-18

申请号：US16234921

申请日：2018-12-28

Applicant: TDK CORPORATION

Inventor： Takeshi SHIBAYAMA ,  Yukio TAKAHASHI ,  Takashi SUZUKI ,  Hiroyuki TANOUE ,  Masashi SHIMOYASU ,  Masahiro KATO

IPC: H01F1/36 ,  H01F27/28 ,  H01F41/04 ,  H01F27/40 ,  C04B35/26

CPC classification number: H01F1/36 ,  C04B35/265 ,  C04B2235/3244 ,  C04B2235/3274 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/786 ,  C04B2235/96 ,  H01F27/2804 ,  H01F27/40 ,  H01F41/043 ,  H01F2027/2809

Abstract: A ferrite sintered body of the invention includes; a main component including 48.65 to 49.45 mol % of iron oxide in terms of Fe2O3, 2 to 16 mol % of copper oxide in terms of CuO, 28.00 to 33.00 mol % of zinc oxide in terms of ZnO, and a balance including nickel oxide, and a subcomponent including boron oxide in an amount of 5 to 100 ppm in terms of B2O3 with respect to 100 parts by weight of the main component, in which the ferrite sintered body includes crystal grains having an average crystal grain size of 2 to 30 μm.

公开(公告)号：US20180057408A1

公开(公告)日：2018-03-01

申请号：US15678775

申请日：2017-08-16

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Ryuichi WADA ,  Yukio TAKAHASHI ,  Hiroyuki TANOUE ,  Tatsuro SUZUKI ,  Takahiro SATO ,  Takashi SUZUKI

IPC: C04B35/26 ,  H01F1/34 ,  H01F17/00 ,  H01F41/02

CPC classification number: C04B35/265 ,  C01G53/006 ,  C01P2006/40 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/5445 ,  H01F1/344 ,  H01F17/0013 ,  H01F17/04 ,  H01F41/0246

Abstract: A ferrite composition includes a main component and an accessory component. The main component includes 43.0 to 51.0 mol % of iron oxide in terms of Fe2O3, 5.0 to 15.0 mol % of copper oxide in terms of CuO, 1.0 to 24.9 mol % of zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The accessory component includes 0.2 to 3.0 pts. wt. of silicon compound in terms of SiO2, 3.0 to 8.0 pts. wt. of cobalt compound in terms of Co3O4 (excluding 3.0 pts. wt.), and 0.2 to 8.0 pts. wt. of bismuth compound in terms of Bi2O3 with respect to 100 pts. wt. of the main component.

公开(公告)号：US20160293302A1

公开(公告)日：2016-10-06

申请号：US15090129

申请日：2016-04-04

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Ryuichi WADA ,  Yukari AKITA ,  Yukio TAKAHASHI ,  Takashi SUZUKI ,  Asuka MURAI ,  Hiroyuki TANOUE

IPC: H01F1/03 ,  H03H7/01 ,  H01F38/14 ,  H01F27/255 ,  H01F27/28

CPC classification number: H03H7/0115 ,  C04B35/265 ,  H01F1/344 ,  H01F17/0013 ,  H01F17/04 ,  H01F2017/0026 ,  H01F2017/048

Abstract: Provided is a ferrite composition composed of: a main component including 23.0 to 47.0 mole % of Fe compound in terms of Fe2O3, 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 SiO2, 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 Co3O4 and 0.25 to 5.00 parts by weight of Bi compound in terms of Bi2O3.

Abstract translation: 提供一种铁素体组合物，其由以下组成的铁素体组合物构成：主要成分为以Fe 2 O 3计，Fe化合物23.0〜47.0摩尔％，CuO换算为3.0〜16.0摩尔％的Cu化合物，以ZnO计为4.0〜39.0摩尔％的Zn化合物 ，1.5〜13.0摩尔％的Si化合物，以SiO 2计，残留的Ni化合物; 和相对于100重量份的主成分的副成分，以Co 3 O 4换算为0.1〜8.0重量份的Co化合物，以Bi 2 O 3换算为0.25〜5.00重量份的Bi化合物。

公开(公告)号：US20150097137A1

公开(公告)日：2015-04-09

申请号：US14507216

申请日：2014-10-06

Applicant: TDK CORPORATION

Inventor： Ryuichi WADA ,  Kouichi KAKUDA ,  Hiroki CHOTO ,  Yukari AKITA ,  Yukio TAKAHASHI ,  Masahiro ENDO ,  Takashi SUZUKI ,  Takahiro SATO ,  Akinori OHI

IPC: H01F1/01 ,  H01F27/255 ,  H01F38/14

CPC classification number: H01F1/01 ,  C04B35/26 ,  C04B35/62645 ,  C04B2235/3275 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/77 ,  H01F1/344 ,  H01F3/08 ,  H01F17/0013 ,  H01F17/04 ,  H01F27/255 ,  H01F38/14

Abstract: 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 Fe2O3, 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 SiO2, 0.10 to 3.00 wt % bismuth oxide in terms of Bi2O3, and 0.10 to 3.00 wt % cobalt oxide in terms of Co3O4, with respect to the main component.

Abstract translation: 铁素体组合物包括主要组分和副组分。 主成分以Fe2O3计，25.0〜49.8摩尔％的氧化铁，以CuO换算为5.0〜14.0摩尔％的氧化铜，换算成氧化锌为0〜40.0摩尔％，还有部分为氧化镍。 副成分相对于主成分，以SiO 2计，氧化铋为0.2〜5.0重量％，氧化铋为0.10〜3.00重量％，Co 3 O 4为0.10〜3.00重量％。

公开(公告)号：US20230402211A1

公开(公告)日：2023-12-14

申请号：US18330073

申请日：2023-06-06

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Yuya OSHIMA ,  Kenji KOMORITA ,  Shigeshi OSAWA ,  Shinichi KONDO ,  Hiroyuki TANOUE ,  Kaori SASAKI ,  Takuya NIIBORI ,  Yukio TAKAHASHI ,  Hidenobu UMEDA

IPC: H01F1/34 ,  C04B35/26

CPC classification number: H01F1/344 ,  C04B35/265 ,  C04B2235/3274 ,  C04B2235/3293 ,  C04B2235/3277 ,  C04B2235/3298

Abstract: A ferrite composition includes a main component and a sub component. The main component includes an iron oxide in terms of Fe2O3, a copper oxide in terms of CuO, a zinc oxide in terms of ZnO, and a nickel oxide as its remainder. The sub component includes a cobalt oxide in terms of Co3O4, a tin oxide in terms of SnO2, and a bismuth oxide in terms of Bi2O3. A is −3.5 or more and 1.0 or less, provided that A=(α−18)/β; is defined, in which α is an amount of the zinc oxide represented by mol % in terms of ZnO in the main component, and β is an amount of the cobalt oxide represented by parts by weight in terms of Co3O4 with respect to 100 parts by weight of the main component.

公开(公告)号：US20180096768A1

公开(公告)日：2018-04-05

申请号：US15708625

申请日：2017-09-19

Applicant: TDK CORPORATION

Inventor： Takeshi SHIBAYAMA ,  Asuka MURAI ,  Yukio TAKAHASHI ,  Takashi SUZUKI ,  Hiroyuki TANOUE ,  Masaki TAKAHASHI

IPC: H01F1/34 ,  H01F41/04 ,  H01F17/00 ,  C04B35/26

CPC classification number: H01F1/344 ,  C04B35/265 ,  C04B35/6261 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/604 ,  C04B2235/608 ,  C04B2235/94 ,  H01F17/0013 ,  H01F41/046

Abstract: A ferrite composition includes a main component and an accessory component. The main component includes 18 to 30 mol % of iron oxide in terms of Fe2O3, 4 to 14 mol % of copper oxide in terms of CuO, 0 to 6 mol % of zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The accessory component includes 0.30 to 1.83 pts.wt. of silicon compound in terms of SiO2, 2.00 to 10.00 pts.wt. of cobalt compound in terms of Co3O4, and 1.00 to 3.00 pts.wt. of bismuth compound in terms of Bi2O3 with respect to 100 pts.wt. of the main component. A cobalt compound content in terms of Co3O4 divided by a silicon compound content in terms of SiO2 is a value of 5.5 to 30.0.

公开(公告)号：US20160300651A1

公开(公告)日：2016-10-13

申请号：US15090196

申请日：2016-04-04

Applicant: TDK CORPORATION

Inventor： Hiroki CHOTO ,  Takeshi SHIBAYAMA ,  Ryuichi WADA ,  Kouichi KAKUDA ,  Yukari AKITA ,  Asuka MURAI ,  Yukio TAKAHASHI ,  Takashi SUZUKI ,  Akinori OHI

IPC: H01F1/34 ,  H01F27/28

CPC classification number: H01F41/0246 ,  C04B35/26 ,  C04B35/2666 ,  C04B35/6261 ,  C04B35/62645 ,  C04B35/62695 ,  C04B2235/3244 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/77 ,  C04B2235/94 ,  H01F1/344 ,  H01F27/2804 ,  H01F2027/2809

Abstract: A ferrite composition composed of a main component including 26 to 46 mol % of an iron oxide in terms of Fe2O3, 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 SiO2, 1.0 to 15.0 parts by weight of a cobalt compound in terms of Co3O4, and 0.7 to 30.0 parts by weight of a bismuth compound in terms of Bi2O3. A value of the cobalt compound content in terms of Co3O4 divided by the silicon compound content in terms of SiO2 is 0.4 to 5.5.

Abstract translation: 由以Fe 2 O 3计的氧化铁为26〜46摩尔％，CuO换算为氧化铜为4〜14摩尔％，ZnO为0〜26摩尔％的氧化锌为主成分的铁素体组合物 ，NiO为40.0摩尔％以上的氧化镍的残渣。 相对于100重量份的主成分，铁素体组合物也由以SiO 2为0.8〜10.0重量份的硅化合物，以化合物计1.0〜15.0重量份的化合物构成的副成分 的Co 3 O 4和0.7〜30.0重量份的Bi 2 O 3换算的铋化合物。 以Co 3 O 4计的钴化合物含量除以硅化合物含量换算成SiO 2的值为0.4〜5.5。

公开(公告)号：US20220310316A1

公开(公告)日：2022-09-29

申请号：US17705969

申请日：2022-03-28

Applicant: TDK CORPORATION

Inventor： Yuya OSHIMA ,  Kenji KOMORITA ,  Masayuki SUZUKI ,  Yuudai KATOU ,  Takeru SASAKI ,  Shigeshi OSAWA ,  Takehiro ISHII ,  Kouichi KAKUDA ,  Yukio TAKAHASHI ,  Tsubasa OZAWA ,  Makoto YOSHINO

IPC: H01F27/29 ,  H01F17/00

Abstract: In the multi-layer coil component, the hole portion is provided in the vicinity of the side surface of the element body, and the distance from the tip position of the external electrode to the hole portion is shorter than the distance from the tip position of the external electrode to the coil. Therefore, when a crack is generated starting from the tip position of the external electrode on the mounting surface, the crack progress toward the hole portion located at a distance closer than the coil. Therefore, in the multi-layer coil component, splitting of the coil due to the crack can be prevented.

公开(公告)号：US20220306541A1

公开(公告)日：2022-09-29

申请号：US17699972

申请日：2022-03-21

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Takashi SUZUKI ,  Yukio TAKAHASHI ,  Kunihiko KAWASAKI ,  Hiroyuki TANOUE ,  Takehiro ISHII ,  Takuya NIIBORI ,  Takahiro SATO ,  Akihiko OIDE ,  Yasuhiro ITO ,  Takashi ENDO ,  Kunio ODA

IPC: C04B35/26

Abstract: A ferrite composition comprises a main component and a subcomponent. The main component includes 32.0 to 46.4 mol % of iron oxide in terms of Fe2O3, 4.4 to 14.0 mol % of copper oxide in terms of CuO, and 8.4 to 56.9 mol % of zinc oxide in terms of ZnO. The subcomponent includes 0.53 to 11.00 parts by weight of a silicon compound in terms of SiO2, 0.1 to 12.8 parts by weight of a tin compound in terms of SnO2, and 0.5 to 7.0 parts by weight of a bismuth compound in terms of Bi2O3, with respect to 100 parts by weight of the main component.