Patent ID: 11948747
Assignee: TAIYO YUDEN CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A dielectric body comprising:
a plurality of crystal grains of which a main component is barium titanate; and
an additive including Zr, Eu and Mn,
wherein at least one of the plurality of crystal grains has a core-shell structure having a core and a shell, a main component of the core being barium titanate, a main component of the shell being barium titanate, a Zr concentration of the shell being higher than that of the core,
wherein a Zr/Ti atomic concentration ratio is 0.02 or more and 0.10 or less,
wherein an Eu/Ti atomic concentration ratio is 0.001 or more and 0.03 or less,
wherein a Mn/Ti atomic concentration ratio is 0.005 or more and 0.05 or less,
wherein the dielectric body has one or more rare earth elements other than Eu, or does not have any rare earth element other than Eu,
wherein a total atomic concentration of the one or more rare elements is smaller than an atomic concentration of Eu when the dielectric body has the one or more rare earth elements,
wherein a median diameter of the plurality of crystal grains is 200 nm or more and 400 nm or less.