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    • 7. 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。