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    • 2. 发明授权
    • Sintered ceramic dielectric body
    • 烧结陶瓷绝缘体
    • US4058404A
    • 1977-11-15
    • US613739
    • 1975-09-16
    • Shinobu FujiwaraHitoshi Tanaka
    • Shinobu FujiwaraHitoshi Tanaka
    • C04B35/465C04B35/475H05K1/03C04B35/00C04B35/46
    • C04B35/465C04B35/475H05K1/0306
    • A sintered ceramic dielectric body is provided which exhibits a high dielectric constant as well as a low dielectric loss and almost no variation in the dielectric constant and the dielectric loss with respect to a wide variation of an applied high AC or DC voltage, respectively. The ceramic dielectric composition consists essentially, by weight, of approximately 18 to 70% of strontium titanate (SrTiO.sub.3), approximately 4 to 75% of barium titanate (BaTiO.sub.3), 2.5 to 17.4% of bismuth oxide (Bi.sub.2 O.sub.3) and 1.7 to approximately 20% of titanium oxide (TiO.sub.2); the ratio by mole of the titanium oxide (TiO.sub.2) to the bismuth oxide (Bi.sub.2 O.sub.3) being within the range from approximately 1 to 18.
    • 提供一种烧结陶瓷电介质体,其分别具有高介电常数以及低的介电损耗,并且相对于所施加的高AC或DC电压的宽变化,介电常数和介电损耗几乎不变化。 陶瓷电介质组合物基本上由重量百分比组成的钛酸锶(SrTiO 3)的约18〜70%,钛酸钡(BaTiO 3)的4〜75%,氧化铋(Bi 2 O 3)的2.5〜17.4%,氧化铋(Bi 2 O 3)的1.7〜20 %的氧化钛(TiO2); 氧化钛(TiO 2)与氧化铋(Bi 2 O 3)的摩尔比在约1〜18的范围内。
    • 3. 发明授权
    • High dielectric constant type ceramic composition
    • 高介电常数陶瓷组合物
    • US4265668A
    • 1981-05-05
    • US89245
    • 1979-10-29
    • Shinobu FujiwaraKiyoshi FurukawaNobuaki KikuchiOsamu IizawaHitoshi Tanaka
    • Shinobu FujiwaraKiyoshi FurukawaNobuaki KikuchiOsamu IizawaHitoshi Tanaka
    • C04B35/499H01B3/12H01G4/12C04B35/46C04B35/00
    • C04B35/499H01B3/12H01G4/1263
    • A basic ceramic composition of high dielectric constant type ceramic composition comprises from 68.67 to 69.19% of PbO, from 3.67 to 4.09% of MgO, from 24.17 to 26.99% of Nb.sub.2 O.sub.5 and from 0.25 to 2.97% of TiO.sub.2, all percentages being by weight. Modified composition may comprise additive of Pb(Mn.sub.2/3 W.sub.1/3)O.sub.3, Pb(Mn.sub.1/3 Nb.sub.2/3)O.sub.3, Pb(Mn.sub.1/3 Ta.sub.2/3)O.sub.3, Pb(Mn.sub.1/2 W.sub.1/2)O.sub.3, MnO, and MgO. Modified composition may comprise Ba, Sr and Ca, which replace Pb of the basic ceramic composition. In a modified composition, the content of B site elements may be larger than that of A site element of an ABO.sub.3 crystal of the high dielectric constant type ceramic composition. A high dielectric constant, low dielectric loss, low temperature dependence of capacitance, high insulation resistance and a low sintering temperature are provided by the ceramic compositions of the present invention.
    • 高介电常数陶瓷组合物的基本陶瓷组合物包含68.67至69.19%的PbO,3.67至4.09%的MgO,24.17至26.99%的Nb2O5和0.25至2.97%的TiO2,所有百分比均为重量百分比。 改性组合物可以包括Pb(Mn2 / 3W1 / 3)O3,Pb(Mn1 / 3Nb2 / 3)O3,Pb(Mn1 / 3Ta2 / 3)O3,Pb(Mn1 / 2W1 / 2)O3,MnO和MgO 。 改性组合物可以包含替代碱性陶瓷组合物的Pb的Ba,Sr和Ca。 在改性组合物中,B位元素的含量可以大于高介电常数型陶瓷组合物的ABO 3晶体的A位元素的含量。 本发明的陶瓷组合物提供高介电常数,低介电损耗,低电容温度依赖性,高绝缘电阻和低烧结温度。