Ceramic capacitor and method for making the same
    1.
    发明授权
    Ceramic capacitor and method for making the same 有权
    陶瓷电容器及其制作方法

    公开(公告)号:US06301092B1

    公开(公告)日:2001-10-09

    申请号:US09591298

    申请日:2000-06-09

    IPC分类号: H01G406

    摘要: A ceramic capacitor has a dielectric ceramic layer and at least one pair of electrodes. The dielectric ceramic layer has a primary phase and secondary phases, and the size of the secondary phases in the thickness direction of the dielectric ceramic layer is not more than about one-third of the thickness of the dielectric ceramic layer. A method for making the ceramic capacitor includes the steps of mixing compounds constituting secondary phases in a primary phase of a dielectric ceramic, annealing and then pulverizing the mixture to prepare a raw material for the secondary phases, mixing the raw material for the secondary phases with other materials for the dielectric ceramic shaping and sintering the mixture to form a dielectric ceramic, and forming electrodes on the dielectric ceramic. The ceramic capacitor has high insulation resistance, superior load characteristics at high temperatures or high humidity and high weather resistance, even when sintered in a reducing atmosphere.

    摘要翻译: 陶瓷电容器具有介电陶瓷层和至少一对电极。 电介质陶瓷层具有主相和次相,并且介电陶瓷层的厚度方向上的次相的尺寸不超过介电陶瓷层的厚度的约三分之一。 制造陶瓷电容器的方法包括以下步骤:将构成第二相的化合物混合在电介质陶瓷的初生相中,退火然后粉碎混合物以制备二次相的原料,将第二相的原料与 电介质陶瓷的其他材料成型并烧结混合物以形成电介质陶瓷,并在电介质陶瓷上形成电极。 陶瓷电容器具有高绝缘电阻,在高温或高湿度下具有优异的负载特性和高耐候性,即使在还原气氛中烧结也是如此。

    Dielectric ceramic composition and monolithic ceramic capacitor
    2.
    发明授权
    Dielectric ceramic composition and monolithic ceramic capacitor 有权
    介电陶瓷组合物和单片陶瓷电容器

    公开(公告)号:US06380116B1

    公开(公告)日:2002-04-30

    申请号:US09626477

    申请日:2000-07-26

    IPC分类号: C04B35468

    CPC分类号: C04B35/4682 H01G4/1227

    摘要: A dielectric ceramic composition comprises a compound oxide comprising barium titanate BamTiO3 as a major component and RO3/2, CaO, MgO, and SiO2, as accessory components, wherein R is at least one element selected from the group consisting of Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb, wherein the compound oxide satisfies the following relationship: 100BamTiO3+aRO3/2+bCaO+cMgO+dSiO2, wherein, on a molar basis, 0.990≦m≦1.030, 0.5≦a≦6.0, 0.10≦b≦5.00, 0.010≦c

    摘要翻译: 电介质陶瓷组合物包括作为主要成分的复合氧化物,其包含作为主要成分的钛酸钡BamTiO 3和作为附加成分的RO3 / 2,CaO,MgO和SiO2,其中R是选自Y,Sm,Eu中的至少一种元素 ,Gd,Tb,Dy,Ho,Er,Tm和Yb,其中复合氧化物满足以下关系:100BamTiO3 + aRO3 / 2 + bCaO + cMgO + dSiO2,其中,以摩尔计为0.990 <= m <= 1.030 ,0.5 <= a <= 6.0,0.10 <= b <= 5.00,0.010 <= c <1.000和0.05 <= d <2.00。 电介质陶瓷组合物满足由日本工业标准(JIS)定义的B特性和由EIA标准定义的关于静电电容对温度的依赖性的X7R特性,并且具有绝缘电阻和静电电容的大CR产物 。 包含由该介电陶瓷组合物构成的薄电介质层的叠层陶瓷电容器是高度可靠的。

    Dielectric ceramic and laminated ceramic capacitor
    9.
    发明授权
    Dielectric ceramic and laminated ceramic capacitor 有权
    介质陶瓷和层压陶瓷电容器

    公开(公告)号:US08264817B2

    公开(公告)日:2012-09-11

    申请号:US12938647

    申请日:2010-11-03

    IPC分类号: H01G4/06

    摘要: A laminated ceramic capacitor which has a dielectric ceramic with a high dielectric constant and has excellent reliability against changes in temperature and mechanical shocks, even when dielectric ceramic layers are reduced in thickness employs a dielectric ceramic containing (Ba1-xCax)yTiO3 (where 0.045≦x≦0.15 and 0.98≦y≦1.05) as its main constituent and containing Re2O3 (where Re is at least one of Gd, Dy, Ho, Yb, and Y), MgO, MnO, V2O5, and SiO2 as accessory constituents, which is represented by the general formula: 100(Ba1-xCax)yTiO3+aRe2O3+bMgO+cMnO+dV2O5+eSiO2, and satisfies each of the following conditions: 0.65≦a≦1.5; 0.98≦y≦1.05; 0.15≦b≦2.0; 0.4≦c≦1.5; 0.02≦d≦0.25; and 0.2≦e≦3.0.

    摘要翻译: 即使介电陶瓷层的厚度减小,即使使用包含(Ba1-xCax)yTiO3的电介质陶瓷(其中0.045和nlE),也可以使用具有高介电常数的电介质陶瓷和具有优异的耐温度变化和机械冲击的可靠性的层压陶瓷电容器 (其中Re为Gd,Dy,Ho,Yb和Y中的至少一种),MgO,MnO,V2O5和SiO2为辅助成分,其中,x和nlE; 0.15和0.98&nlE; y&nlE; 1.05) ,由以下通式表示:100(Ba1-xCax)yTiO3 + aRe2O3 + bMgO + cMnO + dV2O5 + eSiO2,满足下列条件:0.65&nlE; a&nlE; 1.5; 0.98&nlE; y&nlE; 1.05; 0.15&nlE; b&nlE; 2.0; 0.4&nlE; c&nlE; 1.5; 0.02&nlE; d&nlE; 0.25; 和0.2&nlE; e&nlE; 3.0。