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    • 48. 发明授权
    • Method for manufacturing a dielectric ceramic composition dielectric
ceramic and multilayer high frequency device
    • 电介质陶瓷组合物介电陶瓷和多层高频器件的制造方法
    • US5629252A
    • 1997-05-13
    • US662700
    • 1996-06-13
    • Keiji NishimotoHiroshi KagataJunichi KatoTatsuya Inoue
    • Keiji NishimotoHiroshi KagataJunichi KatoTatsuya Inoue
    • C04B35/465C04B35/495H01G4/12C04B35/46
    • H01G4/1218C04B35/465C04B35/495H01G4/1254
    • A dielectric ceramic composition that can be sintered at a low temperature of around 1000.degree. C. and also can have a high dielectric constant, a high Q value and small temperature coefficient at a resonant frequency includes a glass component that promotes sintering. The dielectric ceramics include: the main component comprising calcium oxide, magnesium oxide, niobium oxide and titanium oxide and expressed by the Formula: Ca{(Mg.sub. 1/3 Nb.sub. 2/3).sub.1-x Ti.sub.x }O.sub.3 (wherein X is more than 0 not more than 0.50) within the range of not less than 40 parts by weight nor more than 98 parts by weight; the accessory component comprising at least one selected from SiO.sub.2 and B.sub.2 O.sub.3 within the range of not less than 2 parts by weight nor more than 60 parts by weight; and at least one oxide selected from the group consisting of MgO, NiO, CuO, MNO.sub.2 and WO.sub.3 within the range of not less than 0.1 parts by weight nor more than 10 parts by weight. Consequently, the dielectric ceramic composition of the present invention can be sintered at low temperature. The dielectric ceramic composition also has a stability in composition and high Q value, which can used for the dielectric ceramic and multilayer high frequency device.
    • 可以在约1000℃的低温下烧结并且在共振频率下也可以具有高介电常数,高Q值和小的温度系数的介电陶瓷组合物包括促进烧结的玻璃成分。 电介质陶瓷包括:主要成分包括氧化钙,氧化镁,氧化铌和氧化钛,并由下式表示:Ca {(Mg + E,fra 1/3 + EE Nb + E,fra 2/3 + EE) 1-xTix} O 3(其中X大于0不大于0.50)在不小于40重量份的范围内,不大于98重量份; 所述辅助成分包含选自SiO 2和B 2 O 3中的至少一种,其含量在不小于2重量份,不大于60重量份的范围内; 以及选自MgO,NiO,CuO,MNO 2和WO 3中的至少一种氧化物,其含量在0.1重量份以上,10重量份以下。 因此,本发明的电介质陶瓷组合物可以在低温下烧结。 电介质陶瓷组合物的组成稳定性和Q值高,可用于介电陶瓷和多层高频器件。