CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims benefit of priority to Korean Patent Application No. 10-2019-0077574 filed on Jun. 28, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND

1. Technical Field

The present disclosure relates to a dielectric composition and a multilayer electronic component comprising the same.

2. Description of Related Art

A multilayer ceramic capacitor (MLCC), a type of multilayer electronic component, is a chip type condenser, mounted on the printed circuit boards of various types of electronic products, including image display devices, such as a liquid crystal display (LCD) and a plasma display panel (PDP), a computer, a smartphone, a mobile phone, and the like, serving to charge or discharge electricity.

The multilayer ceramic capacitor may be used as a component of various electronic devices due to advantages thereof, such as miniaturization, high capacity, and ease of mounting. As electronic devices such as computers and mobile devices are miniaturized and implemented with high output, demand for miniaturization and implementation of high capacity of a multilayer ceramic capacitor are increasing.

In order to achieve miniaturization and high capacity of a multilayer ceramic capacitor, thicknesses of dielectric layers and internal electrodes may need to be reduced such that the number of stacked layers thereof may be increased. Generally, a thickness of a dielectric layer is around 0.6 μm, and thinning is continuously undertaken.

However, as the thickness of the dielectric layer is reduced, reliability may be lowered and characteristics such as insulation resistance, a breakdown voltage and the like, may be lowered.

To address the above-described problems, it has been necessary to secure high reliability not only in terms of a structural aspect but also in a compositional aspect of a dielectric.

If a dielectric composition, which may improve reliability at a current level one step further, is secured, a size of a multilayer ceramic capacitor may be reduced further than before.

SUMMARY

An aspect of the present disclosure is to provide a dielectric composition having excellent reliability and a multilayer electronic component including the dielectric composition.

Another aspect of the present disclosure is to provide a dielectric composition having excellent insulation resistance and a multilayer electronic component including the dielectric composition.

Another aspect of the present disclosure is to provide a dielectric composition having a high breakdown voltage and a multilayer electronic component including the dielectric composition.

Another aspect of the present disclosure is to achieve miniaturization and high capacity of the multilayer electronic component.

According to an aspect of the present disclosure, a dielectric composition includes a main ingredient having a perovskite structure represented by ABO3, where A is at least one selected from the group consisting of barium (Ba), strontium (Sr), and calcium (Ca), and B is at least one selected from the group consisting of titanium (Ti), zirconium (Zr), and hafnium (Hf), and a first accessory ingredient, wherein the first accessory ingredient includes 0.1 mole or more of a rare earth element, 0.02 mole or more of niobium (Nb), and 0.25 mole or more and 0.9 mole or less of magnesium (Mg), wherein a sum of contents of the rare earth element and Nb is 1.5 mole or less, based on 100 mole of the main ingredient.

According to another aspect of the present disclosure, a multilayer electronic component includes a body including a dielectric layer and an internal electrode; and an external electrode disposed in the body and connected to the internal electrode, wherein the dielectric layer includes a dielectric composition, wherein the dielectric composition includes a main ingredient having a perovskite structure represented by ABO3, where A is at least one of Ba, Sr, and Ca, and B is at least one of Ti, Zr, and Hf, and a first accessory ingredient, wherein the first accessory ingredient includes 0.1 mole or more of a rare earth element, 0.02 mole or more of Nb, and 0.25 mole or more and 0.9 mole or less of Mg, wherein a sum of contents of the rare earth element and Nb is 1.5 mole or less, based on 100 mole of the main ingredient.

