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US 2022/0028614 A1Published application
Dielectric ceramic composition and ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsTomoki MURATA, Hirofumi AKAMATSU, Fumiyasu OBA, Akira TAKAHASHI
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Abstract
A dielectric ceramic composition that contains an oxide of A, R, and B and an oxide of Mn. The A is at least one selected from the group consisting of K and Na. The R is at least one selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and Sc. The B is at least one selected from the group consisting of Nb and Ta. The molar ratio of the A:R:B:Mn is 2−x:1+x/3:5+y:z. The x, y, and z satisfy −0.3≤x≤0.6, −0.5≤y≤0.5, and 0.001≤z≤0.5, respectively.
Claims16
A dielectric ceramic composition comprising:
- an oxide of A, R, and B;
- and
- an oxide of Mn, wherein
- the A is at least one selected from the group consisting of K and Na,
- the R is at least one selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and Sc,
- the B is at least one selected from the group consisting of Nb and Ta,
- a molar ratio of the A:R:B:Mn is 2−x:1+x/3:5+y:z,
- −0.3≤x≤0.6,
- −0.5≤y≤0.5, and
- 0.001≤z≤0.5.
7 more elements
Dependencies are inferred from the claim text.