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    • 13. 发明授权
    • Dielectric ceramic composition
    • 介电陶瓷组合物
    • US4749668A
    • 1988-06-07
    • US58991
    • 1987-06-08
    • Masaru FujinoGoro NishiokaYukio Sakabe
    • Masaru FujinoGoro NishiokaYukio Sakabe
    • C04B35/00C04B35/497C04B35/499H01B3/12C04B35/46
    • C04B35/497C04B35/499
    • A dielectric ceramic composition consisting essentially of a solid solution of a main component of a ternary system Pb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 -Pb(Zn.sub.1/3 Nb.sub.2/3)O.sub.3 -Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3, and additional components composed of PbTiO.sub.3 and a complex perovskite compound of the general formula: A(Mn.sub.1/2 Nb.sub.1/2)O.sub.3 (wherein A is at least one element selected from the group consisting of Pb, Ba, Sr and Ca). The composition may further contain as an additional components, a complex perovskite compound expressed by the general formula: B(Cu.sub.1/2 W.sub.1/2)O.sub.3 wherein B is at least one element selected from the group consisting of Pb, Ba, Sr and Ca. The main component consisting essentially of 66.53 to 67.27 Wt % of Pb.sub.3 O.sub.4, 25.79 to 26.08 wt % of Nb.sub.2 O.sub.5, 1.47 to 5.09 wt % of NiO, 2.00 to 5.49 wt % of ZnO and 0.02 to 1.19 wt % of MgO and having a composition expressed by the general formula:xPb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 -yPb(Zn.sub.1/3 Nb.sub.2/3)O.sub.3 -zPb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3(wherein x, y and z are percentages by weight of the respective three components and have the following values: 20.0.ltoreq.x.ltoreq.70. 0, 25.0.ltoreq.y.ltoreq.69.5, and 0.5.ltoreq.z.ltoreq.30.0). The contents of the respective additional components per 100 parts by weight of the main component are, 0.5 tp 7.0 parts by weight for PbTiO.sub.3, 0.1 to 5.0 parts by weight for A(Mn.sub.1/2 Nb.sub.1/2)O.sub.3, not more than 5.0 parts by weight for B(Cu.sub.1/2 W.sub.1/2)O.sub.3, respectively.
    • 一种介电陶瓷组合物,主要由三元体系Pb(Ni1 / 3Nb2 / 3)O3-Pb(Zn1 / 3Nb2 / 3)O3-Pb(Mg1 / 3Nb2 / 3)O3的主要成分的固溶体组成, 由PbTiO 3和通式为A(Mn1 / 2Nb1 / 2)O3的复合钙钛矿化合物(其中A为选自Pb,Ba,Sr和Ca中的至少一种元素)组成的组分。 该组合物可以进一步含有作为附加成分的由通式B(Cu1 / 2W1 / 2)O3表示的复合钙钛矿化合物,其中B是选自Pb,Ba,Sr和Ca中的至少一种元素。 主要成分基本上由Pb3O4的66.53〜67.27Wt,Nb2O5的25.79〜26.08wt%,NiO的1.47〜5.09wt%,ZnO的2.00〜5.49wt%,MgO的0.02〜1.19wt%组成, 通式为:xPb(Ni1 / 3Nb2 / 3)O3-yPb(Zn1 / 3Nb2 / 3)O3-zPb(Mg1 / 3Nb2 / 3)O3(其中x,y和z分别为三种成分的重量比 并且具有以下值:20.0