Dielectric ceramic composition and electronic component
    6.
    发明授权
    Dielectric ceramic composition and electronic component 有权
    介电陶瓷组合物和电子元件

    公开(公告)号:US08450230B2

    公开(公告)日:2013-05-28

    申请号:US12978950

    申请日:2010-12-27

    IPC分类号: C04B35/468

    摘要: A dielectric ceramic composition comprises a main component composed of at least one selected from BaTiO3, (Ba, Ca)TiO3, (Ba, Sr)TiO3 and (Ba, Ca, Sr)TiO3, an oxide of rare earth element and a composite compound including Ba. 9 to 13 mol of the composite compound in terms of composite compound is included in the dielectric composition. The dielectric ceramic composition includes surface diffusion particles having surface diffusion structure composed of non diffusion phase and diffusion phase including rare earth element. In the surface diffusion particle, when an area of the non diffusion phase is defined as S1, an area of the diffusion phase is defined as S2, S1 and S2 satisfy a relation of S1:S2=20:80 to 30:70 (Note that, except S1=30 and S2=70), when an average concentration of the rare earth element in the surface diffusion particle is defined as C, S2 and C satisfy a relation of 4.8≦S2×C≦5.8. By the present invention, dielectric ceramic composition which improves reliability with obtaining good specific permittivity and temperature characteristic and electronic component to which the dielectric ceramic composition is applied can be obtained.

    摘要翻译: 电介质陶瓷组合物包括由选自BaTiO 3,(Ba,Ca)TiO 3,(Ba,Sr)TiO 3和(Ba,Ca,Sr)TiO 3,稀土元素的氧化物和复合化合物 包括巴。 复合化合物中的9〜13摩尔复合化合物包含在电介质组合物中。 电介质陶瓷组合物包括具有由非扩散相和包含稀土元素的扩散相组成的表面扩散结构的表面扩散粒子。 在表面扩散粒子中,当非扩散相的面积被定义为S1时,扩散相的面积被定义为S2,S1和S2满足S1的关系:S2 = 20:80〜30:70(注 除了S1 = 30和S2 = 70之外),当表面扩散粒子中的稀土元素的平均浓度定义为C时,S2和C满足4.8 @ S2×C 5.8的关系。 通过本发明,可以获得通过获得良好的比介电常数和温度特性提高可靠性的电介质陶瓷组合物以及应用电介质陶瓷组合物的电子部件。