公开(公告)号：US20210091298A1

公开(公告)日：2021-03-25

申请号：US17040310

申请日：2019-03-19

Applicant: TDK CORPORATION

Inventor： Masakazu HIROSE ,  Yuiko HIROSE ,  Hiroki KATOH ,  Tamotsu SASAKI ,  Yuji UMEDA

IPC: H01L41/187 ,  C04B35/495

Abstract: A piezoelectric composition containing: a complex oxide having a perovskite structure represented by a general formula of ABO3; copper; and one or more elements selected from the group consisting of chromium, nickel and zinc, in which in ABO3, an A-site element is potassium and a B-site element is niobium, or niobium and tantalum, with respect to 1 mol of the complex oxide, a content ratio of the copper is α mol % in terms of CuO, a content ratio of one or more elements selected from the group consisting of chromium, nickel and zinc is β mol % in terms of CrO3/2, NiO, ZnO, α satisfies a relationship of 0.2≤α≤2.5, and β satisfies a relationship of 0.2≤β≤2.0.

公开(公告)号：US20170047151A1

公开(公告)日：2017-02-16

申请号：US15304193

申请日：2015-03-10

Applicant: TDK CORPORATION

Inventor： Shogo KADOTA ,  Kenichi SUZUKI ,  Yuji UMEDA ,  Ryuji HASHIMOTO ,  Keiji TAKEDA

IPC: H01F1/057 ,  C22C38/00 ,  H01F1/055 ,  B22F3/16 ,  H01F1/058 ,  H01F1/059

CPC classification number: H01F1/057 ,  B22F3/16 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C2202/02 ,  H01F1/0556 ,  H01F1/0557 ,  H01F1/0577 ,  H01F1/058 ,  H01F1/059

Abstract: To provide a permanent magnet which uses Ce of an abundant resource and has a great magnetic anisotropy in rare earth permanent magnets. To obtain a permanent magnet having a high magnetic anisotropy due to the trivalent Ce state by setting the abundance ratio C3/(C3+C4) in the main phase grains to be 0.1≦C3/(C3+C4)≦0.5 where C3 denotes the number of trivalent Ce atoms and C4 denotes the number of tetravalent Ce atoms.

Abstract translation: 提供一种使用丰富资源的Ce并且在稀土永磁体中具有很大的磁各向异性的永磁体。 为了通过将主相晶粒中的丰度比C3 /（C3 + C4）设定为0.1≤C3/（C3 + C4）≤0.5，由于三价Ce状态而获得具有高磁各向异性的永磁体，其中C3表示 三价Ce原子数，C4表示四价Ce原子数。

公开(公告)号：US20160086703A1

公开(公告)日：2016-03-24

申请号：US14385855

申请日：2014-02-12

Applicant: TDK CORPORATION

Inventor： Kenichi SUZUKI ,  Yuji UMEDA ,  Ryuji HASHIMOTO

IPC: H01F1/057 ,  H02K21/02

CPC classification number: H01F1/0577 ,  H02K21/02

Abstract: A R-T-B based permanent magnet which not only has equivalent magnetic properties as the existing Nd—Fe—B based permanent magnet as well as light mass but also can be suitably used as a magnet for field system of a permanent magnet synchronous rotating machine. The magnet can be obtained in a case where the composition of the compound for forming the main phase is (R1-x(Y1-zLaz)x)2T14B (R is rare earth element(s) consisting of one or more elements of Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, T is one or more transition metal elements with Fe or Fe and Co as essential elements, 0.0

Abstract translation: 不仅具有与现有的Nd-Fe-B系永久磁铁等同的磁特性以及轻质量的R-T-B系永磁体，而且也可以适用于永久磁铁同步旋转机的磁场系统的磁体。 在用于形成主相的化合物的组成为（R1-x（Y1-zLaz）x）2T14B（R是由Ce的一种或多种元素组成的稀土元素）的情况下，可以获得磁体， Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Tm，Yb和Lu，T是一种或多种具有Fe或Fe和Co作为必需元素的过渡金属元素，0.0

公开(公告)号：US20190144341A1

公开(公告)日：2019-05-16

申请号：US16185498

申请日：2018-11-09

Applicant: TDK CORPORATION

Inventor： Kumiko YAMAZAKI ,  Yuki NAGAMINE ,  Takeshi SHIBAHARA ,  Yuji UMEDA ,  Junichi YAMAZAKI

IPC: C04B35/58 ,  H01G4/12

Abstract: A metal oxynitride thin film having a perovskite structure, in which the metal oxynitride thin film has a composition represented by a compositional formula A1+αBOx+αNy wherein α is larger than zero and 0.300 or less, x+α is larger than 2.450, and y is 0.300 or more and 0.700 or less, an AO structure having a layered structure parallel to a plane perpendicular to a c-axis of the perovskite structure and having a composition represented by a general formula AO, and the AO structure is bonded with the perovskite structure and incorporated in the perovskite structure.

公开(公告)号：US20190019622A1

公开(公告)日：2019-01-17

申请号：US16069095

申请日：2017-02-01

Applicant: TDK CORPORATION

Inventor： Kumiko YAMAZAKI ,  Hiroshi CHIHARA ,  Yuki NAGAMINE ,  Junichi YAMAZAKI ,  Yuji UMEDA

IPC: H01G4/08 ,  H01G4/33 ,  C30B29/10 ,  C01B21/082

Abstract: A polycrystalline dielectric thin film and a capacitor element have a large relative dielectric constant. The polycrystalline dielectric thin film has a perovskite oxynitride as a principal component. The perovskite oxynitride is represented by compositional formula Aa1Bb1OoNn (a1+b1+o+n=5), and the a-axis length of the crystal lattice of the perovskite oxynitride is larger than a theoretical value.

公开(公告)号：US20180286585A1

公开(公告)日：2018-10-04

申请号：US15938730

申请日：2018-03-28

Applicant: TDK CORPORATION

Inventor： Yuji UMEDA ,  Kumiko YAMAZAKI

IPC: H01G4/12 ,  C04B35/495 ,  C04B35/626 ,  C04B35/64 ,  C04B35/634

CPC classification number: H01G4/1254 ,  C04B35/495 ,  C04B35/6262 ,  C04B35/6264 ,  C04B35/62655 ,  C04B35/63416 ,  C04B35/64 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3251 ,  C04B2235/3895 ,  C04B2235/602 ,  C04B2235/606 ,  C04B2235/6567 ,  C04B2235/77 ,  H01G4/085 ,  H01G4/1209 ,  H01G4/1227 ,  H01G4/1272 ,  H01G4/33 ,  H01L28/55

Abstract: A polycrystalline dielectric thin film including a main component made of an oxynitride expressed by a general formula of (M(1)1-xM(2)x)(M(3)1-yM(4)y)(O1-zNz)3. 0≤x≤1, 0≤y≤1, and 0

公开(公告)号：US20230027057A1

公开(公告)日：2023-01-26

申请号：US17858566

申请日：2022-07-06

Applicant: TDK CORPORATION

Inventor： Kumiko YAMAZAKI ,  Shuto KANO ,  Yuji UMEDA ,  Hiroki KITAMURA ,  Takeshi SHIBAHARA ,  Junichi YAMAZAKI

IPC: H01G4/33 ,  H01G4/20

Abstract: An amorphous dielectric includes a compound represented by A1+αBOxNy. −0.3≤α≤0.3, 0

公开(公告)号：US20200255732A1

公开(公告)日：2020-08-13

申请号：US16785704

申请日：2020-02-10

Applicant: TDK CORPORATION

Inventor： Tatsuya TERUI ,  Yuji UMEDA

IPC: C09K11/77 ,  H01L33/50

Abstract: A phosphor includes a high concentration region and at least one of low concentration regions lower in concentration of an additive than the high concentration region. The high concentration region surrounds at least one of low concentration regions.