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DIELECTRIC CERAMIC AND MONOLITHIC CERAMIC CAPACITOR 发明申请

2023-06-20 3700 1164K 0

专利信息

申请日期 2025-07-08 申请号 US12548230
公开(公告)号 US20090310279A1 公开(公告)日 2009-12-17
公开国别 US 申请人省市代码 全国
申请人 Takehisa Sasabayashi; Tomoyuki Nakamura; Takayuki Yao; Masayuki Ishihara
简介 A dielectric ceramic represented by a general formula : 100BamTiO3+aROn+bMOv+cXOw (where R represents a rare earth element, M represents a predetermined metal element, and n, v, and w represent independently a positive number determined in accordance with the valences of the elements R and M and a sintering aid component X, respectively), and the solid solution regions of the secondary components in the main phase grains are 10% or less (including 0%) on average in terms of a cross-sectional area ratio. The sintering aid component X contains at least Si, and m, a, b, and c satisfy 0.995≦m≦1.030, 0.1≦a≦2.0, 0.1≦b≦3.0, and 0.1≦c≦5.0. In a monolithic ceramic capacitor, dielectric layers are formed from the above-described dielectric ceramic. Consequently, a dielectric ceramic having a good AC voltage characteristic, maintaining a desired large dielectric constant and a good temperature characteristic, exhibiting a small dielectric loss, and being capable of ensuring the reliability and a monolithic ceramic capacitor including the dielectric ceramic are realized.


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