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    Dielectric Ceramic Composition and Multi-Layered Ceramic Capacitor Comprised Thereof
    3.
    发明申请
    Dielectric Ceramic Composition and Multi-Layered Ceramic Capacitor Comprised Thereof 有权

    公开(公告)号：US20220238277A1

    公开(公告)日：2022-07-28

    申请号：US17586027

    申请日：2022-01-27

    Applicant: KEMET Electronics Corporation

    Inventor： Hanzheng Guo ,  Abhijit Gurav

    IPC: H01G4/12 ,  H01G4/30 ,  H01G4/008 ,  H01G4/012 ,  C04B35/468 ,  C04B35/64

    Abstract: This invention relates to a multilayer ceramic capacitor produced by alternatively stacking the ceramic dielectric layers and internal electrodes mainly comprise base metals. The present dielectric ceramic composition having a main component with a perovskite structure ABO3 formula of: (KxNayLizA1-x-y-z)m(NbuTavBw)O3 wherein: A is at least one selected from the alkaline earth element group of Ca, Sr, and Ba; B is at least one selected from the group of Ti, Zr, Hf and Sn; and wherein: x, y, z, u, v, and w are molar fractions of respective elements, and m is the molar ratio of A-site and B-site elements. They are in the following respective range: 0.95≤m≤1.05; 0.05≤x≤0.90; 0.05≤y≤0.90; 0.00≤z≤0.12 0

    Dielectric Ceramic Composition and Ceramic Capacitor Using the Same
    7.
    发明申请
    Dielectric Ceramic Composition and Ceramic Capacitor Using the Same 有权

    公开(公告)号：US20220234958A1

    公开(公告)日：2022-07-28

    申请号：US17585770

    申请日：2022-01-27

    Applicant: KEMET Electronics Corporation

    Inventor： Hanzheng Guo ,  Abhijit Gurav

    IPC: C04B35/495 ,  C04B37/00 ,  H01G4/30 ,  H01G4/12 ,  H01G4/248

    Abstract: The present invention discloses a dielectric ceramic formula enabling one to obtain a multilayer ceramic capacitor by alternatively stacking the ceramic dielectric layers and base metal internal electrodes. The dielectric ceramic composition comprises a primary ingredient: [(Na1-xKx)sA1-s]m[(Nb1-yTay)uB1vB2w)]O3 wherein: A is at least one selected from the alkaline-earth element group of Mg, Ca, Sr, and Ba; B1 is at least one selected from the group of Ti, Zr, Hf and Sn; B2 is at least one selected from transition metal elements; and wherein: x, y, s, u, v, and w are molar fractions of respective elements, and m is the molar ratio of [(Na1-xKx)sA1-s] and [(Nb1-yTay)uB1vB2w)]. They are in the following respective range: 0.93≤m≤1.07; 0.7≤s≤1.0; 0.00≤x≤0.05; 0.00≤y≤0.65; 0.7≤u≤1.0; 0.0≤v≤0.3; 0.001≤w≤0.100; a first sub-component composes of at least one selected from the rare-earth compound, wherein the rare-earth element is no more than 10 mol % parts with respect to the main component; and a second sub-component composes a compound with low melting temperature to assist the ceramic sintering process, said frit, which is Li free and could be at least one selected from fluorides, silicates, borides, and oxides. The content of frit is within the range of 0.01 mol % to 15.00 mol % parts with respect to the main component.

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