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    • 10. 发明授权
    • Dielectric ceramic composition
    • 介电陶瓷组合物
    • US06949487B2
    • 2005-09-27
    • US10487172
    • 2002-08-19
    • Kazuhiro ItoHitoshi Masumura
    • Kazuhiro ItoHitoshi Masumura
    • C04B35/46C04B35/468H01B3/12H01Q3/44H05K1/03B32B18/00H01Q23/00
    • H01Q3/44B82Y30/00C04B35/468C04B35/6262C04B35/62645C04B2235/3201C04B2235/3203C04B2235/3215C04B2235/3217C04B2235/3232C04B2235/3236C04B2235/3256C04B2235/3281C04B2235/3284C04B2235/3298C04B2235/3409C04B2235/3418C04B2235/5454C04B2235/604C04B2235/79H05K1/0306
    • It is an object of the invention to provide a dielectric ceramic composition which enables its firing temperature to be lowered and which has an excellent electrical properties, particularly temperature dependence of resonance frequencies. A dielectric ceramic composition according to the invention comprises an oxide of a barium titanate family having a composition formula represented as BaTixO2x+1 (3.5≦x≦5.0); a first chemical element group consisting of at least one kind of alkaline-earth metals, silicon, zinc, aluminium, titanium, copper, bismuth and molybdenum; and a second chemical element group consisting of at least one kind of alkali metals and boron. A weight ratio of a total of each chemical element in the first and second chemical element groups to the oxide (the total of each chemical element/the oxide) is between 45/55 and 65/35 inclusive when the ratio is determined by converting said each chemical element to its oxide. A weight ratio of the second chemical element group to the first chemical element group (the second chemical element group/the first chemical element group) is between 0.01 and 0.10 inclusive when the ratio is determined by converting said each chemical element to its oxide.
    • 本发明的目的是提供一种使其烧成温度降低并且具有优异的电特性,特别是共振频率的温度依赖性的电介质陶瓷组合物。 根据本发明的电介质陶瓷组合物包含钛酸钡族的氧化物,其组成式为表示为BaTi x O 2 x + 1(3.5 <= x <= 5.0 ); 由至少一种碱土金属,硅,锌,铝,钛,铜,铋和钼组成的第一化学元素组; 和由至少一种碱金属和硼组成的第二化学元素基团。 当第一和第二化学元素基团中的每个化学元素与氧化物的总量(每个化学元素/氧化物的总和)的重量比在45/55和65/35之间时,包括当通过将所述 每个化学元素与其氧化物。 当通过将所述每种化学元素转化为其氧化物来确定该比率时,第二化学元素基团与第一化学元素基团(第二化学元素基团/第一化学元素基团)的重量比在0.01和0.10之间。