	US 11,837,410 B2
	Dielectric ceramic composition and ceramic capacitor
Tomoki Murata, Nagaokakyo (JP); Hirofumi Akamatsu, Fukuoka (JP); Fumiyasu Oba, Tokyo (JP); and Akira Takahashi, Tokyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Oct. 11, 2021, as Appl. No. 17/498,430.
Application 17/498,430 is a continuation of application No. PCT/JP2020/010606, filed on Mar. 11, 2020.
Claims priority of application No. 2019-098428 (JP), filed on May 27, 2019.
Prior Publication US 2022/0028614 A1, Jan. 27, 2022
Int. Cl. H01G 4/12 (2006.01); C04B 35/495 (2006.01); H01G 4/30 (2006.01)

CPC H01G 4/1254 (2013.01) [C04B 35/495 (2013.01); H01G 4/30 (2013.01); C04B 2235/3255 (2013.01); C04B 2235/3262 (2013.01); C04B 2235/765 (2013.01)]

16 Claims

1. 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.