DIELECTRIC CERAMIC COMPOSITION AND CERAMIC CAPACITOR

摘要

A dielectric ceramic composition includes sintered ceramic grains having a core-shell structure, wherein smaller than or equal to 50% of the grains have a domain width of twin less than 20 nm; 30% to 70% of the grains have a domain width of twin in the range from 20 nm to 50 nm; less than or equal to 50% of the grains have a domain width of twin greater than 50 nm or have no twin. A ceramic capacitor includes more than one internal electrode and one or more dielectric layers composed of a dielectric ceramic composition, each of the dielectric layers being sandwiched between two neighboring internal electrodes.