US 11,935,698 B2
Dielectric ceramic composition and multi-layered ceramic capacitor comprised thereof
Hanzheng Guo, Simpsonville, SC (US); and Abhijit Gurav, Simpsonville, SC (US)
Assigned to KEMET Electronics Corporation, Fort Lauderdale, FL (US)
Filed by KEMET Electronics Corporation, Fort Lauderdale, FL (US)
Filed on Jan. 27, 2022, as Appl. No. 17/586,027.
Claims priority of provisional application 63/142,766, filed on Jan. 28, 2021.
Prior Publication US 2022/0238277 A1, Jul. 28, 2022
Int. Cl. H01G 4/12 (2006.01); C04B 35/468 (2006.01); C04B 35/64 (2006.01); H01G 4/008 (2006.01); H01G 4/012 (2006.01); H01G 4/30 (2006.01)
CPC H01G 4/1227 (2013.01) [C04B 35/4682 (2013.01); C04B 35/64 (2013.01); H01G 4/008 (2013.01); H01G 4/012 (2013.01); H01G 4/30 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A dielectric ceramic composition comprising a primary component defined by:
(KxNayLizA1-x-y-z)m(NbuTav)O3
wherein:
A is at least one element selected from the group consisting of Ca, Sr, and Ba;
B is at least one element selected from the group consisting of Ti, Zr, Hf and Sn;
x, y, z, u, v, and w are molar fractions of respective elements;
m is the molar ratio of A-site and B-site elements;
0.95≤m≤1.05;
0.05≤x≤0.90;
0.05≤y≤0.90;
0.00≤z≤0.03;
0<u<1;
0.0≤w≤0.3; and
u+v+w=1;
a first accessory ingredient comprising at least one rare-earth element selected from the group consisting of Y, Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu;
a second accessory ingredient comprising at least one transition metal element selected from the group consisting of V, Cr, Mo, W, Mn, Fe, Co, Ni, Cu, and Zn; and
a third accessory ingredient comprising a frit.