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    • 9. 发明授权
    • Dielectric ceramic composition
    • 介电陶瓷组合物
    • US5733832A
    • 1998-03-31
    • US790772
    • 1997-01-27
    • Mitsutoshi KawamotoYukio Hamaji
    • Mitsutoshi KawamotoYukio Hamaji
    • C04B35/00C04B35/46C04B35/499H01B3/12H01G4/12
    • C04B35/499H01G4/1254
    • A dielectric ceramic composition composed mainly of lead magnesium-niobate �Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 !, strontium titanate �SrTiO.sub.3 !, and lead titanate �PbTiO.sub.3 !, characterized in that the molar ratio of said three major components is defined by �Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 !.sub.x .multidot.�SrTiO.sub.3 !.sub.y .multidot.�PbTiO.sub.3 !.sub.z (where x+y+z=100 parts by mole, and each value of x, y, and z is on lines or within the area enclosed by lines passing through four points A (72, 10, 18), B (76, 5, 19), C (57, 5, 38), and D (48, 20, 32) in a triangular composition diagrams), and said three major components are supplemented by (Pb.sub.1-x Ba.sub.x) (Cu.sub.1/2 W.sub.1/2)O.sub.3 (where 0.ltoreq.x.ltoreq.1) in an amount less than about 5 parts by mole (excluding 0 part by mole) for 100 parts by mole of said major components. This dielectric ceramic composition can be sintered at low temperatures and has a high permittivity and a high mechanical strength.
    • 主要由铅铌酸镁[Pb(Mg + E,fra 1/3 + EE Nb + E,fra 2/3 + EE)O 3],钛酸锶[SrTiO 3]和钛酸铅[PbTiO 3] 其特征在于所述三种主要成分的摩尔比由[Pb(Mg + E,fra 1/3 + EE Nb + E,fra 2/3 + EE)O 3] x x [SrTiO 3] yx [PbTiO 3] z (其中x + y + z = 100份摩尔,x,y和z的每个值在线上或在通过四个点A(72,10,18),B(76, 5,19),C(57,5,38)和D(48,20,32)在三角形组成图中),并且所述三个主要成分由(Pb1-xBax)(Cu + E, / 2 + EE W + E,fra 1/2 + EE)O 3(其中0