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公开(公告)号:US20230386745A1
公开(公告)日:2023-11-30
申请号:US18315563
申请日:2023-05-11
Applicant: TDK CORPORATION
Inventor: Yuichiro SUEDA , Kengo AIZAWA , Shota KUMAGAI , Takeshi SHOUJI , Satoshi SUGAWARA , Masatoshi TARUTANI , Atsushi YAMADA , Manabu KUMAGAI
CPC classification number: H01G4/1227 , H01G4/30 , H01G4/012 , H01G4/008 , C04B35/49
Abstract: A dielectric composition, including: dielectric grains containing a main component represented by a composition formula [(CaxSr(1-x))O]m[(TiyHfzZr(1-y-z))O2] (m is more than 1.020); a grain boundary phase located between the dielectric grains; and segregation grains each containing at least Ca, Si, and O. A first segregation grain is defined as a segregation further containing Mn among the segregation grains each containing at least Ca, Si, and O, and a second segregation grain is defined as a segregation containing substantially no Mn among the segregation grains each containing at least Ca, Si, and O. N1/(N1+N2) is more than 0.23 and 1.00 or less, in which N1 is a number density of first segregation grains in a cross-section of the dielectric composition, and N2 is a number density of second segregation grains in the cross-section of the dielectric composition.
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公开(公告)号:US20230090201A1
公开(公告)日:2023-03-23
申请号:US17876162
申请日:2022-07-28
Applicant: TDK CORPORATION
Inventor: Toshihiro IGUCHI , Tomoaki NONAKA , Takeshi SHOUJI
IPC: H01G4/12 , H01G4/30 , H01G4/012 , H01G4/008 , C04B35/468
Abstract: A dielectric composition includes a dielectric grain including a perovskite compound and a first segregation phase including at least Ca, Al, Si, and O.
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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
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.
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