Dielectric ceramic composition and ceramic electronic component

Abstract

A dielectric ceramic composition including a main component having a perovskite crystal structure expressed by general formula ABO3, a first sub-component of an oxide of a rare earth element, and a second sub-component of an oxide of Si, and at least dielectric particles having a core-shell structure and segregated particles, in which a concentration of the rare earth element in the segregated particles is two or more times an average concentration of the rare earth element in a shell portion of the dielectric particles having the core-shell structure, and an area of the region occupied by the segregated particles is 5.0% or less and an average of cross-sectional areas of the respective segregated particles is 0.075 μm2 or less in a cross-section obtained by cutting the dielectric ceramic composition.

Description

technical field

[0001] The present invention relates to a dielectric ceramic composition and a ceramic electronic component having a dielectric layer composed of the dielectric ceramic composition. Background technique

[0002] Multilayer ceramic capacitors, which are one example of ceramic electronic components, are widely used as small, high-performance, and highly reliable electronic components, and are often mounted on multilayer ceramic capacitors as electronic components for automobiles.

[0003] Multilayer ceramic capacitors for automobiles need to be compact and high performance, of course, and must also have high reliability in high temperature and high voltage environments. In recent years, multilayer ceramic capacitors have been required to ensure performance and improve reliability in a high-temperature environment of 125 to 150° C. and at 16 V to 100 V.

[0004] Patent Document 1 describes a multilayer ceramic capacitor that satisfies X8R characteristics and ha...

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