Dielectric ceramic, manufacturing method thereof, and multilayer ceramic capacitor
    2.
    发明授权
    Dielectric ceramic, manufacturing method thereof, and multilayer ceramic capacitor 有权
    介电陶瓷及其制造方法和多层陶瓷电容器

    公开(公告)号:US06900977B2

    公开(公告)日:2005-05-31

    申请号:US10780720

    申请日:2004-02-19

    CPC分类号: H01G4/30 H01G4/1227 Y10T29/43

    摘要: A dielectric ceramic formed by firing in a reducing atmosphere is provided. A multilayer ceramic capacitor formed by using the aforementioned dielectric ceramic has superior reliability even when the thicknesses of dielectric ceramic layers formed therefrom are reduced. The dielectric ceramic has crystal grains; and crystal boundaries and triple points, which are located between the crystal grains. The crystal grains contain perovskite compound grains composed of a perovskite compound represented by ABO3 (where A is Ba and Ca, or Ba, Ca and Sr; B is Ti, or Ti and a part thereof which is replaced with at least one of Zr and Hf) and crystal oxide grains composed of a crystal oxide containing at least Ba, Ti and Si, and about 80% or more of the number of the triple points each have a cross-sectional area of about 8 nm2 or less.

    摘要翻译: 提供通过在还原气氛中烧制形成的介电陶瓷。 通过使用上述介电陶瓷形成的多层陶瓷电容器即使当由其形成的介电陶瓷层的厚度减小时也具有优异的可靠性。 电介质陶瓷具有晶粒; 晶界和三点位于晶粒之间。 晶粒含有由ABO 3(其中A为Ba和Ca或Ba,Ca和Sr; B为Ti或Ti的钙钛矿化合物或其一部分为ABO 3 由Zr和Hf中的至少一种替代)和由至少含有Ba,Ti和Si的结晶氧化物组成的晶体氧化物晶粒,并且约80%或更多的三重点数目的截面面积为约 8nm 2以下。