Dust core, iron powder therefor and method of making
    1.
    发明授权
    Dust core, iron powder therefor and method of making 失效
    粉芯,铁粉及其制作方法

    公开(公告)号:US5800636A

    公开(公告)日:1998-09-01

    申请号:US779240

    申请日:1997-01-03

    CPC分类号: H01F41/0246 H01F1/24

    摘要: A dust core is prepared from an iron powder with a particle size of 75-200 .mu.m having added thereto 0.015-0.15 wt % of silica sol, 0.05-0.5 wt % of a silicone resin, and 10-50 wt % based on the silicone resin of an organic titanium compound. By subjecting the iron powder to a curing treatment at 50.degree.-250.degree. C., compacting the powder, and annealing in an inert atmosphere at 550.degree.-650.degree. C., there is obtained a dust core consisting essentially of iron powder particles with a particle size of 75-200 .mu.m, 0.03-0.1% by weight of Si, 15-210 ppm of Ti, and 300-2,500 ppm of oxygen.

    摘要翻译: 粉末核心由粒径为75〜200μm的铁粉制成,添加了0.015〜0.15重量%的硅溶胶,0.05〜0.5重量%的有机硅树脂,10〜50重量% 有机钛化合物的有机硅树脂。 通过使铁粉在50-250℃下进行固化处理,压实粉末,并在550-650℃的惰性气氛中进行退火,得到一个主要由铁粉末和 粒径为75-200μm,Si 0.03-0.1重量%,Ti为15-210ppm,氧为300-2,500ppm。

    Piezoelectric ceramic composition
    3.
    发明授权
    Piezoelectric ceramic composition 有权
    压电陶瓷组合物

    公开(公告)号:US07901590B2

    公开(公告)日:2011-03-08

    申请号:US12076693

    申请日:2008-03-21

    IPC分类号: H01L41/187

    CPC分类号: C04B35/462

    摘要: A piezoelectric ceramic composition that acquires excellent piezoelectric properties even when it is fired at a low temperature is offered. The piezoelectric ceramic composition possesses a composition corresponding to a solid solution that contains a first compound having a rhombohedral crystal-based perovskite structure, a second compound having a tetragonal crystal-based perovskite structure, and a third compound. The third compound is a compound oxide containing Bi as a first component element, Fe or Mn as a second component element, and a hexavalent metallic element as a third component element. The hexavalent metallic element is at least one kind selected from W and Mo.

    摘要翻译: 提供即使在低温下烧制也能获得优异的压电特性的压电陶瓷组合物。 压电陶瓷组合物具有对应于包含具有菱形结晶基钙钛矿结构的第一化合物,具有四方晶系钙钛矿结构的第二化合物和第三化合物的固溶体的组成。 第三化合物是包含Bi作为第一组分元素的复合氧化物,作为第二组分元素的Fe或Mn,以及作为第三组分元素的六价金属元素。 六价金属元素是选自W和Mo中的至少一种。

    Method of manufacturing multilayer ceramic device
    4.
    发明申请
    Method of manufacturing multilayer ceramic device 审中-公开
    多层陶瓷器件的制造方法

    公开(公告)号:US20050213283A1

    公开(公告)日:2005-09-29

    申请号:US11079600

    申请日:2005-03-15

    摘要: A method of manufacturing a multilayer ceramic device capable of obtaining a superior multilayer ceramic device even if the number of layers increases or even if the multilayer ceramic device is upsized, and specifically suitable for manufacturing a multilayer piezoelectric device is provided. After a laminate in which ceramic precursor layers including a raw material of a ceramic layer and internal electrode precursor layers including copper metal as a raw material of an internal electrode layer are alternately stacked is formed, the laminate is heated to degrease the laminate. At this time, an atmospheric gas including an inert gas, 7 mol % to 50 mol % of water vapor, and, if necessary, hydrogen is used to adjust an oxygen partial pressure within a range of p(O2)≦(25331×Kp)2/3, where p(O2) represents an oxygen partial pressure; Kp represents a water dissociation equilibrium constant; and the pressure unit is Pa. Thereby, while the oxidation of copper metal can be prevented, a binder can be sufficiently decomposed and removed, and residual carbon can be reduced.

    摘要翻译: 即使层数增加,即使多层陶瓷器件大型化也能够得到优良的多层陶瓷器件的多层陶瓷器件的制造方法,特别适用于多层压电器件的制造。 在形成层叠体之后,层叠有层叠体,其中包括陶瓷层的原料的陶瓷前体层和包含作为内部电极层的原料的铜金属的内部电极前体层交替堆叠,加热层压体以使层压体脱脂。 此时,使用包含7mol%至50mol%水蒸气的惰性气体和必要时的氢气的气氛气体来调节p(O 2/2)范围内的氧分压, (25331×KP)2/3,其中p(O 2)2表示氧分压; Kp表示水解离平衡常数; 并且压力单位为Pa。由此,可以防止铜金属的氧化,可以充分分解和除去粘合剂,并且可以减少残留的碳。

    Piezoelectric ceramic material
    9.
    发明授权
    Piezoelectric ceramic material 有权
    压电陶瓷材料

    公开(公告)号:US06685850B2

    公开(公告)日:2004-02-03

    申请号:US09915347

    申请日:2001-07-27

    IPC分类号: C04B3501

    CPC分类号: H01L41/187 C04B35/475

    摘要: The invention provides a piezoelectric ceramic material comprising a Bi3TiNbO9 crystal and/or an MBi2Nb2O9 crystal which are each a bismuth layer compound, where M represents at least one element selected from Sr, Ba and Ca. The ceramic material contains Bi, Ti, M and Nb as main component elements. The molar ratio as oxides of the main component elements is given by (Bi3−xMx)z (Nb1+yTi1−y)O9 provided that 0

    摘要翻译: 本发明提供一种包含Bi3TiNbO9晶体和/或MBi2Nb2O9晶体的压电陶瓷材料,它们各自是铋层化合物,其中M表示选自Sr,Ba和Ca中的至少一种元素。 陶瓷材料含有Bi,Ti,M和Nb作为主要成分。 如果0