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    • 1. 发明授权
    • High dielectric ceramic composition
    • 高介电陶瓷组合物
    • US5250481A
    • 1993-10-05
    • US950165
    • 1992-09-24
    • Sung Y. Park
    • Sung Y. Park
    • C04B35/46C04B35/468H01B3/12H01G4/12
    • H01B3/12C04B35/4682H01G4/1227
    • A high dielectric ceramic composition essentially consisting of 97.04 weight % to 97.80 weight % of BaTiO.sub.3 as a host material, 1.42 weight % to 1.92 weight % of Nb.sub.2 O.sub.5, 0.04 weight % to 0.06 weight % of MnO.sub.2 0.33 weight % to 0.45 weight % of CoO, 0.31 weight % to 0.41 weight % of CeO.sub.2 and 0.10 weight % to 0.12 weight % of ZnO. The composition exhibits TCC characteristic satisfying the characteristic of X7R of EIA standard, high dielectric constant of 3,200 to 3,800 and high insulation resistivity of 10.sup.3 to 10.sup.14. With these characteristics, the composition is useful for making multi-layer ceramic capacitors, thereby contributing to a compactness of electronic/electric appliances.
    • 主要由作为主体材料的BaTiO 3为97.04重量%至97.80重量%,Nb 2 O 5为1.42重量%至1.92重量%,MnO 2 + L为0.04重量%〜0.06重量%,0.33重量%〜0.45重量%的高介电性陶瓷组合物 CoO的百分比,CeO 2为0.31重量%至0.41重量%,ZnO为0.10重量%至0.12重量%。 该组合物表现出满足EIA标准的X7R特性,TIA高介电常数为3,200〜3,800,高绝缘电阻率为103〜1014的TCC特性。具有这些特性,组成对于制造多层陶瓷电容器是有用的,从而有助于 电子/电器的紧凑性。