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AssigneesSamsung Electro-Mechanics Co., Ltd., Research & Business Foundation Sungkyunkwan University
InventorsSeok-Hyun Yoon, Masaki Takaki, Yoon-Ah Roh, Dae-Ho Yoon, Chang-Hoon Kim, Doo-Young Kim
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The present invention relates to a dielectric ceramic composition, method for preparing the same, and electronic device using the same. According to the present invention, there is provided a dielectric ceramic composition which allows use of a nickel internal electrode, sintering under a reducing atmosphere, and having 1000 or higher dielectric constant while providing excellent dc-bias properties and reliability which is close to paraelectric property. The composition of the present invention can generate high effective capacity under high DC voltage, have strong resistance against electrostatic discharge (ESD) damage, and be used for preparing an electronic device having low acoustic noise.
A dielectric ceramic composition comprising a main component of xBaTiO3-ySrTiO3-zBi(Mg0.5Ti0.5)O3 (molar ratio x+y+z=1, 0.5≦x≦0.99, 0.01≦z≦0.1), a first accessary component comprising an element selected from the group consisting of Mn, V, Cr, Fe, Ni, Co, Cu and Zn, and a second accessary component which is SiO2 or a glass-forming material comprising SiO2.
A method for preparing a dielectric substance comprising sintering a main component of xBaTiO3-ySrTiO3-zBi(Mg0.5Ti0.5)O3 (molar ratio x+y+z=1, 0.5≦x≦0.99, 0.1-3.0 at % of a first accessary component comprising an element selected from the group consisting of Mn, V, Cr, Fe, Ni, Co, Cu and Zn, and 0.2-10 at % of a second accessary component which is SiO2 or a glass-forming material comprising SiO2 under a reducing atmosphere.
An electronic device comprising a plurality of dielectric substance ceramic layers, an internal electrode formed between the dielectric substance ceramic layers, and an external electrode connected electrically to the internal electrode,
Dependencies are inferred from the claim text.