公开(公告)号：US09966190B2

公开(公告)日：2018-05-08

申请号：US15466316

申请日：2017-03-22

Applicant: TDK CORPORATION

Inventor： Dan Sakurai ,  Nobuto Morigasaki ,  Tatsuya Ishii ,  Takuma Ariizumi ,  Shinsuke Hashimoto ,  Yasuhiro Ito

IPC: H01G4/12 ,  C04B35/49 ,  C04B35/468 ,  H01G4/248 ,  H01G4/30

CPC classification number: H01G4/1245 ,  C04B35/4682 ,  C04B35/49 ,  C04B35/6263 ,  C04B35/62675 ,  C04B35/62685 ,  C04B35/6342 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3232 ,  C04B2235/3236 ,  C04B2235/3241 ,  C04B2235/3244 ,  C04B2235/3249 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/442 ,  C04B2235/6562 ,  C04B2235/6567 ,  C04B2235/6582 ,  C04B2235/6584 ,  C04B2235/663 ,  C04B2235/75 ,  C04B2235/768 ,  C04B2237/346 ,  C04B2237/68 ,  C04B2237/704 ,  H01G4/248 ,  H01G4/30

Abstract: A dielectric ceramic composition has good characteristics even under the high electric field intensity, and particularly good IR characteristic and the high temperature accelerated lifetime. The dielectric ceramic composition has a main component having a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3, a first sub component having oxides of a rare earth element R, a second sub component as a sintering agent, wherein the dielectric particles has dielectric particles having high diffusion rate of the rare earth element, preferably of a complete solid solution particle, and when a concentration of Ti atom in the diffusion phase is 100 atom %, then an average concentration of the rare earth element R in the diffusion phase is 5 atom % or more, and an average concentration of Zr in the diffusion phase is 10 atom % or more.

公开(公告)号：US11955283B2

公开(公告)日：2024-04-09

申请号：US17195366

申请日：2021-03-08

Applicant: TDK CORPORATION

Inventor： Taku Murakami ,  Nobuto Morigasaki ,  Dan Sakurai ,  Takuma Ariizumi ,  Toshihiko Kaneko

IPC: H01G4/12 ,  C04B35/468 ,  H01G4/30

CPC classification number: H01G4/1227 ,  C04B35/4682 ,  H01G4/30 ,  C04B2235/3206 ,  C04B2235/3224 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/442

Abstract: A dielectric ceramic composition includes a barium titanate, an oxide of an R element, an oxide of an M element, and an oxide containing Si. The R element is one or more elements selected from Eu, Gd, Tb, Dy, Y, Ho, and Yb. The M element is one or more elements selected from Mg, Ca, Mn, V, and Cr. A ratio of an amount of the oxide of the R element in terms of R2O3 to an amount of the oxide containing Si in terms of SiO2 is 0.8:1 to 2.2:1. A ratio of an amount of the oxide of the M element in terms of MO to the amount of the oxide containing Si in terms of SiO2 is 0.2:1 to 1.8:1.50% or more of the number of dielectric particles constituting the dielectric ceramic composition is core-shell dielectric particles having a core-shell structure.

公开(公告)号：US11114247B2

公开(公告)日：2021-09-07

申请号：US16250911

申请日：2019-01-17

Applicant: TDK CORPORATION

Inventor： Dan Sakurai ,  Toshihiko Kaneko ,  Nobuto Morigasaki ,  Toshinari Takahashi ,  Yasuhiro Ito

IPC: H01G4/30 ,  H01G4/12 ,  H01G4/008

Abstract: The object of the present invention is to provide the multilayer ceramic capacitor having no deterioration of dielectric properties even in case an inhibitor of an internal electrode layer is pushed out to a dielectric layer when sintering. The multilayer ceramic capacitor 1 including a capacitor element body 10 comprising a dielectric layer 2 and an internal electrode layer 3 stacked in an alternating manner, wherein when Za represents Zr concentration of an dielectric particle in a center part 6 of the dielectric layer 2 and Zb represents Zr concentration of a dielectric particle near the internal electrode layer, 0

公开(公告)号：US11639313B2

公开(公告)日：2023-05-02

申请号：US17551633

申请日：2021-12-15

Applicant: TDK CORPORATION

Inventor： Dan Sakurai ,  Yasuhiro Ito ,  Nobuto Morigasaki ,  Toshihiko Kaneko ,  Toshihiro Iguchi

IPC: C04B35/47 ,  H01B3/12

Abstract: A dielectric ceramic composition contains dielectric particles containing a main component represented by a composition formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 and grain boundaries present between the dielectric particles. The values of m, x, y, and z in the composition formula are all molar ratios. In the composition formula, 0.9≤m≤1.4, 0≤x

公开(公告)号：US10074480B2

公开(公告)日：2018-09-11

申请号：US15466224

申请日：2017-03-22

Applicant: TDK CORPORATION

Inventor： Dan Sakurai ,  Nobuto Morigasaki ,  Tatsuya Ishii ,  Takuma Ariizumi ,  Shinsuke Hashimoto ,  Yasuhiro Ito

IPC: C04B35/49 ,  H01G4/12 ,  C04B35/626 ,  C04B35/63 ,  C04B35/64 ,  H01G4/012 ,  H01G4/248 ,  H01G4/30

CPC classification number: H01G4/1245 ,  C01G25/006 ,  C04B35/4682 ,  C04B35/49 ,  C04B35/6261 ,  C04B35/62675 ,  C04B35/6303 ,  C04B35/638 ,  C04B35/64 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3236 ,  C04B2235/3241 ,  C04B2235/3249 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3287 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/652 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/6584 ,  C04B2235/662 ,  C04B2235/768 ,  C04B2235/81 ,  C04B2235/96 ,  H01G4/012 ,  H01G4/1227 ,  H01G4/248 ,  H01G4/30

Abstract: A dielectric ceramic composition having good characteristic even under high electric field intensity, and particularly good IR characteristic and high temperature accelerated lifetime. The present invention is a dielectric ceramic composition comprising, a main component comprising a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3, a first sub component comprising oxides of a rare earth element, a second sub component as a sintering agent, wherein said dielectric ceramic composition is a complete solid solution particle wherein the rare earth element is solid dissolved to entire dielectric particle, or a core-shell particle having high ratio of the diffusion phase, and comprises the dielectric particle having 5 to 20 atom % of the average concentration of the rare earth element in the diffusion phase, and having uniform concentration distribution of the rare earth element in the diffusion phase.

公开(公告)号：US10804033B2

公开(公告)日：2020-10-13

申请号：US16230154

申请日：2018-12-21

Applicant: TDK CORPORATION

Inventor： Dan Sakurai ,  Toshihiko Kaneko ,  Nobuto Morigasaki ,  Toshinari Takahashi ,  Yasuhiro Ito

IPC: C04B35/46 ,  H01G4/12 ,  H01G4/30 ,  C04B35/468 ,  C04B35/638 ,  C04B35/49 ,  C04B35/626 ,  C01G49/00 ,  H01G4/232 ,  H01G4/248 ,  H01G4/008

Abstract: The object of the present invention is to provide a dielectric ceramic composition having good properties, particularly good IR property and high temperature accelerated lifetime.The dielectric ceramic composition of the present invention has a main component made of a perovskite type compound expressed by a compositional formula of (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, m, x, y, and z of the above compositional formula all represent molar ratios, and each satisfies 0.9≤m≤1.1, 0≤x≤0.5, 0≤y≤0.3, 0≤(x+y)≤0.6, and 0.03≤z≤0.3), and a first sub component made of an oxide of a rare earth element R (note that, R is at least one selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), wherein the dielectric ceramic composition includes a dielectric particle and a particle boundary, and the dielectric particle include a complete solid solution particle in which Zr is solid dissolved to the entire dielectric particle, when Za represents a concentration of Zr in the dielectric ceramic composition in case a concentration of Ti atom in the dielectric ceramic composition is deemed to be 100 atom % and when Zb represents an average concentration of Zr in the complete solid solution particle in case a concentration of Ti atom in the complete solid solution particle is deemed to be 100 atom %, 0.7

公开(公告)号：US10059630B2

公开(公告)日：2018-08-28

申请号：US15466247

申请日：2017-03-22

Applicant: TDK CORPORATION

Inventor： Dan Sakurai ,  Nobuto Morigasaki ,  Tatsuya Ishii ,  Takuma Ariizumi

IPC: C04B35/49 ,  C04B35/468 ,  H01G4/12 ,  C04B35/626 ,  C04B35/64 ,  H01G4/30 ,  H01G4/005

CPC classification number: C04B35/49 ,  C04B35/4682 ,  C04B35/6261 ,  C04B35/64 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3241 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3418 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/6582 ,  C04B2235/6584 ,  C04B2235/662 ,  C04B2235/768 ,  H01G4/1227 ,  H01G4/1245 ,  H01G4/30

Abstract: The object of the present invention is to provide the dielectric ceramic composition having good characteristics even under the high electric field intensity, and particularly good IR characteristic and the high temperature accelerated lifetime. The dielectric ceramic composition according to the present invention comprises a main component comprising a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, said “m”, “x”, “y” and “z” all show a mol ratio, and each satisfies 0.94≤m≤1.1, 0≤x≤0.2, 0≤y≤0.2, 0.06≤z