公开(公告)号：US20230386699A1

公开(公告)日：2023-11-30

申请号：US18308294

申请日：2023-04-27

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Kenichiro MASUDA

IPC: H01B3/10

CPC classification number: H01B3/10

Abstract: A dielectric composition includes main phases having a tungsten bronze structure and grain boundaries existing between the main phases. At least one or more rare earth elements selected from La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, and Dy is RE. A concentration ratio of RE in central portions of the main phases to RE in peripheral portions of the main phases is 0.2 or less.

公开(公告)号：US20230386746A1

公开(公告)日：2023-11-30

申请号：US18308343

申请日：2023-04-27

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Kenichiro MASUDA

IPC: H01G4/12 ,  C04B35/495

CPC classification number: H01G4/1236 ,  C04B35/495 ,  C04B2235/3255 ,  C04B2235/3436 ,  C04B2235/442 ,  C04B2235/5436 ,  C04B2235/85

Abstract: A dielectric composition includes main phases having a tungsten bronze structure and first segregation phases. The first segregation phases include Ba and Si.

公开(公告)号：US20250059095A1

公开(公告)日：2025-02-20

申请号：US18761881

申请日：2024-07-02

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Kenichiro MASUDA ,  Tetsuya YOSHIYAMA ,  Takuma ARIIZUMI ,  Toshio ASAHI

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

Abstract: A dielectric composition includes main phase grains and segregation grains. The segregation grains at least partly include Ba—Mg—Si—O segregation grains including Ba, Mg, Si, and O. Ba, Mg, and Si in the Ba—Mg—Si—O segregation grains constitute 70 parts by mol or more in total out of 100 parts by mol of a total of metal elements and Si in the Ba—Mg—Si—O segregation grains.

公开(公告)号：US20230303451A1

公开(公告)日：2023-09-28

申请号：US18070860

申请日：2022-11-29

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Takeshi SHOUJI ,  Kenichiro MASUDA

IPC: C04B35/49 ,  H01G4/12

CPC classification number: C04B35/49 ,  H01G4/1209 ,  H01G4/30

Abstract: A dielectric composition includes dielectric particles and segregation phases. The dielectric particles each include Ca and/or Sr. The segregation phases each include Mn, Si, O, and at least one selected from Ca and Sr.