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    • 71. 发明授权
    • Dielectric ceramic composition
    • 介电陶瓷组合物
    • US5905049A
    • 1999-05-18
    • US968993
    • 1997-11-12
    • Hiroaki Matoba
    • Hiroaki Matoba
    • C04B35/46C04B35/499H01B3/12H01G4/12C04B35/495H01G4/06H01G4/14
    • H01G4/1254C04B35/499
    • Disclosed is a dielectric ceramic composition having a high dielectric constant, which can be fired along with silver and silver alloys at temperatures not higher than 1000.degree. C. To a two-component dielectric ceramic composition comprising a solid solution that consists essentially of lead nickel niobate Pb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 and lead titanate PbTiO.sub.3, added is at least one additive selected from the group consisting of the compounds Pb.sub.3 O.sub.4, CuO and WO.sub.3 capable of forming a composition of a chemical formula Pb(Cu.sub.1/2 W.sub.1/2)O.sub.3, and manganese oxide. The additives have the ability to promote the sintering of the two-component composition and to lower the firing temperature for the composition.
    • 公开了具有高介电常数的电介质陶瓷组合物,其可以在不高于1000℃的温度下与银和银合金一起烧制。对于包含基本上由铌酸铅镍构成的固溶体的双组分介电陶瓷组合物 添加的Pb(Ni + E,fra 1/3 + EE Nb + E,fra 2/3 + EE)O 3和钛酸铅PbTiO 3是至少一种选自以下的添加剂:化合物Pb3O4,CuO和WO3,其能够 形成化学式Pb(Cu + E,fra 1/2 + EE W + E,fra 1/2 + EE)O 3和氧化锰的组合物。 添加剂具有促进双组分组合物的烧结并降低组合物的烧制温度的能力。
    • 73. 发明授权
    • Monolithic ceramic capacitor
    • 单片陶瓷电容器
    • US5835339A
    • 1998-11-10
    • US901221
    • 1997-07-24
    • Norihiko SakamotoHarunobu SanoTakaharu Miyazaki
    • Norihiko SakamotoHarunobu SanoTakaharu Miyazaki
    • C04B35/46H01B3/00H01B3/12H01G4/12H01G4/30H01G4/005H01G4/06
    • H01G4/30
    • A monolithic ceramic capacitor and producing method thereof are disclosed. The ceramic capacitor has a plurality of dielectric ceramic layers, a plurality of inner electrodes formed between the dielectric ceramic layers in such a manner that one end of each inner electrode is exposed out of either end of the dielectric ceramic layers, and outer electrodes electrically connected with the exposed inner electrodes; in which the inner electrodes each are made of a base metal, and Si oxide layers or layers comprising an Si oxide and at least one component that constitutes said dielectric ceramic layers and said inner electrodes are formed adjacent to the inner electrodes. The capacitor has excellent thermal impact resistance and wet load resistance characteristics.
    • 公开了一种叠层陶瓷电容器及其制造方法。 陶瓷电容器具有多个电介质陶瓷层,多个内电极,形成在电介质陶瓷层之间,使得每个内电极的一端从电介质陶瓷层的任一端露出,外电极电连接 与暴露的内部电极; 其中内部电极各自由贱金属制成,并且包括Si氧化物和构成所述电介质陶瓷层和所述内部电极的至少一个部件的Si氧化物层或层形成为与内部电极相邻。 电容器具有优异的耐热冲击性和耐湿负载特性。
    • 77. 发明授权
    • Composition for producing low sintering temperature ceramic dielectrics
and method of manufacturing such dielectrics
    • 用于生产低烧结温度陶瓷电介质的组合物和制造这种电介质的方法
    • US5759935A
    • 1998-06-02
    • US617273
    • 1996-03-14
    • Hidetoshi MizutaniMasahiko OkuyamaNoritaka YoshidaHirofumi OzekiHiroshi Katagiri
    • Hidetoshi MizutaniMasahiko OkuyamaNoritaka YoshidaHirofumi OzekiHiroshi Katagiri
    • C04B35/46C04B35/468H01B3/12H01P7/10
    • C04B35/4688
    • Powders of BaCO.sub.3, TiO.sub.2, ZnO, etc. are mixed to each other at a predetermined ratio of quantity, calcined in an atmospheric air at 90.degree.-120.degree. C., and pulverized to obtain a calcined powder having an average grain size from 1 to 3 .mu. m. 0.1 to 20 parts-by weight of a powder having an average grain size from 0.1 to 1.5 .mu.m comprising a glass having a transition point of not higher than 450.degree. C. obtained by mixing powders of Pb.sub.3 O.sub.4, SiO.sub.2, Na.sub.2 O, etc. to each other, melting and then pouring into water and pulverizing the thus obtained glass is admixed to the calcined powder. The mixture is dried, pelleted by adding a resin and the pellet powder is molded into a cylindrical shape, applied with CIP (Cold isotactic press), and the molding product after the treatment is sintered in an atmospheric air at 850.degree. to 1000.degree. C. to obtain a dielectric ceramic sintered at low temperature. The resultant dielectric ceramic has high denseness and high unloaded Q value while maintaining .tau.f within a practical range.
    • 将BaCO 3,TiO 2,ZnO等的粉末以规定的量彼此混合,在大气中在90〜120℃下煅烧,粉碎,得到平均粒径为1的煅烧粉末 至3亩。 0.1〜20重量份平均粒径为0.1〜1.5μm的粉末,其包含通过将Pb 3 O 4,SiO 2,Na 2 O等的粉末混合而成的转变点不高于450℃的玻璃 彼此熔融,然后倒入水中并粉碎由此获得的玻璃与煅烧粉末混合。 将混合物干燥,通过加入树脂沉淀,将颗粒粉末成型为圆筒形,涂敷CIP(冷全同立构压机),将处理后的成型体在大气中在850〜1000℃下烧结 以获得在低温下烧结的电介质陶瓷。 所得介电陶瓷具有高密度和高卸载Q值,同时将τf保持在实际范围内。