US 2021/0202169 A1Published application

Dielectric composition and electronic device

AssigneeTDK Corporation

InventorsToshihiro IGUCHI, Nobuto MORIGASAKI

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Abstract

A dielectric composition includes main phases and Ca-RE-Si—O segregation phases. The main phases include a main component expressed by ABO3. “A” includes at least one selected from barium and calcium. “B” includes at least one selected from titanium and zirconium. “RE” represents at least one of rare earth elements. A molar ratio of (Si/Ca) is larger than one. A molar ratio of (Si/RE) is larger than one, provided that the molar ratio of (Si/RE) is a molar ratio of silicon included in the segregation phases to the rare earth elements included therein. An average length of major axes of the segregation phases is 1.30-2.80 times as large as an average particle size of the main phases. An average length of minor axes of the segregation phases is 0.21-0.48 times as large as an average particle size of the main phases.

Claims19

Dependent claims

A dielectric composition comprising main phases and Ca-RE-Si—O segregation phases, wherein

the main phases include a main component expressed by ABO3,
“A” includes at least one selected from barium and calcium,
“B” includes at least one selected from titanium and zirconium,
“RE” represents at least one of rare earth elements,
a molar ratio of (Si/Ca) is larger than one, provided that the molar ratio of (Si/Ca) is a molar ratio of silicon included in the Ca-RE-Si—O segregation phases to calcium included in the Ca-RE-Si—O segregation phases,
a molar ratio of (Si/RE) is larger than one, provided that the molar ratio of (Si/RE) is a molar ratio of silicon included in the Ca-RE-Si—O segregation phases to the rare earth elements included in the Ca-RE-Si—O segregation phases,
an average length of major axes of the Ca-RE-Si—O segregation phases is 1.30-2.80 times as large as an average particle size of the main phases, and
an average length of minor axes of the Ca-RE-Si—O segregation phases is 0.21-0.48 times as large as an average particle size of the main phases.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/119,212Filed 11 Dec 2020
Priority: JP 2019-23893327 Dec 2019
Published: 1 Jul 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

H01G 4/1227
Based on titanium oxides or titanates: based on alkaline earth titanates
H01G 4/30
Fixed capacitors; Processes of their manufacture: stacked capacitors
C04B 35/465
Based on titanates: based on alkaline earth metal titanates
C04B 35/4682
Based on barium titanates: based on BaTiO3 perovskite phase

Family

US 11,501,919 B2Related patent
US 2021/0202169 A1This patent

From the US filing history. Foreign family members aren’t listed.

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