Samsung Electro-Mechanics Co., Ltd.

Sungkyunkwan University

Hyung Joon Jeon

Chang Hak Choi

Kum Jin Park

Jong Hoon Yoo

Jae Sung Park

Sang Hoon Kwon

Ki Myoung Yun

Kwang Hee Nam

Sang Min Youn

Hye Young Baeg

Jin Woo Kim

Jong Ho Lee

Jong Han Kim

Kang Heon Hur

Tae Yoon Kim

Jeong Ryeol Kim

Chang Hoon Kim

Hee Sun Chun

Hyoung Uk Kim

Chung Eun Lee

Jong Suk Jeong

Kyung Ryul Lee

Sang Hyuk Kim

Duk Joon Kim

In Tae Seo

Je Hee Lee

Su Been Kim

Eun Jung Kim

Young Bin Jeong

Anh Le Mong

Woong Gi Kang

Won Hyeong Kim

Hyung Sub Woo

Joo Young Kim

Jung Hwan Kim

Ji Seop Oh

A dielectric composition and a multilayer capacitor including the same are disclosed. The dielectric composition including: a BaTiO-based main ingredient; a first auxiliary ingredient including rare earth elements; and a second auxiliary ingredient including at least one of Ba and Ca but essentially including Ba, wherein the rare earth elements include Tb and Dy, and the first auxiliary ingredient and the second auxiliary ingredient satisfy a molar content condition of 0.40<(Tb/T_RE)*(Ba+Ca)<0.93, where T_RE is a total molar content of the rare earth elements in the first auxiliary ingredient.

Dielectric composition and multilayer capacitor

A dielectric material includes a main component represented by (BaCa)(Ti(Zr, Sn, Hf))O(0≤x≤1 and 0≤y≤0.5); a first subcomponent including at least one of elements among Y, Dy, Ho, Er, Gd, Ce, Nd, Nb, Sm, Tb, Eu, Tm, La, Lu, and Yb; a second subcomponent including Si and/or Al; and a third subcomponent including Ba and/or Ca.

Dielectric material and multilayer ceramic electronic component including the same

A ceramic electronic component includes: a body including dielectric layers and internal electrodes; and external electrodes disposed on the body and connected to the internal electrodes, wherein the dielectric layer includes a plurality of first secondary phases, the first secondary phase is a secondary phase including Ni, Mg, Al, Si, and O, and at least one of the plurality of first secondary phases has a ratio of a major axis length to a minor axis length of 4 or more.

Ceramic electronic component having a dielectric with secondary phases, method of manufacturing ceramic electronic component, and method of producing dielectric powder

A multilayer ceramic electronic component includes a body including a dielectric layer and an internal electrode, and an external electrode disposed on the exterior of the body. The dielectric layer includes a plurality of dielectric grains and a grain boundary present between the dielectric grains. A molar ratio (Al/Ti) of Al and Ti included in the grain boundary satisfies 0.022 to 0.028.

Multilayer ceramic electronic component

A ceramic electronic component includes: a body including dielectric layers and internal electrodes; and external electrodes disposed on the body and connected to the internal electrodes, wherein the dielectric layer includes a plurality of dielectric crystal grains, and at least one of the plurality of dielectric crystal grains has a core-double shell structure, the double shell includes a first shell surrounding at least a portion of the core and a second shell surrounding at least a portion of the first shell, the first shell includes a first element, one or more of Sn, Sb, Ge, Si, Ga, In, or Zr, and the second shell includes a second element, one or more of Ca or Sr.

Ceramic electronic component

Disclosed is a protective layer to protect a lithium metal negative electrode for a lithium secondary battery, in which the protective layer may inhibit formation of lithium dendrite and improve thermal/chemical stability, and conductivity of lithium ions. Further, disclosed are a production method of the protective layer, and a lithium secondary battery including the protectively layer. The protective layer contains a poly(arylene ether sulfone)-poly(ethylene glycol) graft copolymer represented by a following Chemical Formula 1: 

Protective layer for protecting lithium metal negative electrode for lithium secondary battery, production method thereof, and lithium secondary battery including the same

There are provided a composite perovskite powder, a preparation method thereof, and a paste composition for an internal electrode having the same, the composite perovskite powder capable of preventing ions from being eluted from an aqueous system at the time of synthesis while being ultra-atomized, such that when the composite perovskite powder is used as an inhibitor powder for an internal electrode, sintering properties of the internal electrode may be deteriorated, and sintering properties of a dielectric material may be increased; accordingly, connectivity of the internal electrode may be improved, and permittivity and reliability of a multilayer ceramic capacitor (MLCC) may be increased.

Composite perovskite powder, preparation method thereof, and paste composition for internal electrode having the same

There are provided a method of manufacturing perovskite powder, and perovskite powder and a multilayer ceramic electronic component manufactured thereof. The manufacturing method includes: washing metal oxide hydrate to remove impurities therefrom; adding pure water and an acid or a base to the metal oxide hydrate to prepare a metal oxide sol; mixing the metal oxide sol with a metal salt to form perovskite particle nuclei; and conducting grain growth of the perovskite particle nuclei by hydrothermal treatment to produce perovskite powder. The method of manufacturing perovskite powder and the perovskite powder manufactured by the same have advantages such as excellent crystallinity, reduced generation of fine powder, and favorable dispersion properties.

Method of manufacturing perovskite powder, perovskite powder manufactured by the same and multilayer ceramic electronic component

There are provided a dielectric composition and a preparation method thereof, the dielectric composition including: a first perovskite powder for a core represented by ABO: and a second perovskite powder for a shell represented by ABO, having an average particle diameter corresponding to &#x2153; to 1/10 of an average particle diameter of the first perovskite powder, and included in an amount of 1 to 70 parts by weight with respect to 100 parts by weight of the first perovskite powder, wherein particles of the second perovskite powder have pores having a volume fraction of 3 to 50 vol % therein. According to the present invention, there are provided a dielectric composition having excellent dielectric characteristics and electrical characteristics, and a preparation method thereof.

Dielectric composition and preparation method thereof

There are provided a method of manufacturing a ceramic powder having a perovskite structure and a ceramic powder having a perovskite structure manufactured by the same. The method includes: mixing a compound of an element corresponding to site A in an ABOperovskite structure as well as a compound of an element corresponding to site B in the same structure, with supercritical water in a continuous mode to form seed crystals; and mixing the seed crystals in a batch mode to conduct grain growth thereof.

Method of manufacturing ceramic powder having perovskite structure and ceramic powder having perovskite structure manufactured using the same

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Gyunggi-do, South Korea

Hyung Joon Jeon