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    Piezoelectric Ceramics and Piezoelectric Element
    1.
    发明申请
    Piezoelectric Ceramics and Piezoelectric Element 审中-公开
    压电陶瓷和压电元件

    公开(公告)号：US20070257228A1

    公开(公告)日：2007-11-08

    申请号：US10581277

    申请日：2004-12-03

    申请人： Takeo Tsukada ,  Tomohisa Azuma ,  Masakazu Hirose ,  Hitoshi Oka

    发明人： Takeo Tsukada ,  Tomohisa Azuma ,  Masakazu Hirose ,  Hitoshi Oka

    IPC分类号： H01L41/083

    CPC分类号： C04B35/475 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3224 ,  C04B2235/3227 ,  H01L41/187

    摘要： A piezoelectric ceramics having ceramic particles, wherein said ceramic particles comprises bismuth layer compound containing at least Sr, Ln (note that Ln is a lanthanoid element), Bi, Ti and O and including MIIBi4Ti4O15 type crystal (MII is an element composed of Sr and Ln) as a main component, and an oxide of Mn as a subcomponent; and an average particle diameter by the code length measuring method is 0.8 to 4.7 μm: by which it is possible to provide piezoelectric ceramics having a large Qmax in a third harmonic mode of thickness vertical vibration in a relatively high frequency band (for example, 16 to 65 MHz), a resonator an other piezoelectric element comprising the piezoelectric ceramics as a piezoelectric substance thereof.

    摘要翻译： 一种具有陶瓷颗粒的压电陶瓷，其中所述陶瓷颗粒包括至少含有Sr，Ln的铋层化合物（注意Ln是镧系元素），Bi，Ti和O，并且包括M II > 4 15 15 类型晶体（M II）是由Sr和Ln组成的元素作为主要成分， 和Mn的氧化物作为副成分; 并且通过代码长度测量方法的平均粒径为0.8至4.7μm：通过该压电陶瓷可以在相对的厚度垂直振动的三次谐波模式中提供具有大Q最大值的压电陶瓷 高频带（例如，16至65MHz），谐振器和包括作为其压电体的压电陶瓷的其它压电元件。

    Piezoelectric ceramic composition
    3.
    发明申请
    Piezoelectric ceramic composition 审中-公开
    压电陶瓷组合物

    公开(公告)号：US20060043329A1

    公开(公告)日：2006-03-02

    申请号：US11210468

    申请日：2005-08-24

    申请人： Masakazu Hirose ,  Tomohisa Azuma ,  Masahito Furukawa ,  Takeo Tsukada ,  Norimasa Sakamoto

    发明人： Masakazu Hirose ,  Tomohisa Azuma ,  Masahito Furukawa ,  Takeo Tsukada ,  Norimasa Sakamoto

    IPC分类号： C04B35/49

    CPC分类号： C04B35/493 ,  C04B35/62665 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/3241 ,  C04B2235/3251 ,  C04B2235/3418 ,  H01L41/187

    摘要： A piezoelectric ceramic composition which has a large electromechanical coupling factor and is excellent in heat resisting properties is provided. As additives, Cr, Al and Si are contained together in the piezoelectric ceramic composition including a perovskite compound which contains Pb, Zr and Ti as main components. Preferably, Cr, Al and Si are respectively contained in a content of 0.05 to 0.50 wt % in terms of Cr2O3, in a content of 0.005 to 1.500 wt % in terms of Al2O3, and in a content of 0.005 to 0.100 wt % in terms of SiO2. By simultaneously including these three elements and setting the contents thereof to fall within the above mentioned ranges, the electromechanical coupling factor kt can be 30% or more, and ΔFr, which is the rate of change in resonant frequency Fr between before and after application of an external thermal shock, can be 0.5% or less in absolute value.

    摘要翻译： 提供了具有大的机电耦合系数并且耐热性优异的压电陶瓷组合物。 作为添加剂，包含Pb，Zr和Ti作为主要成分的钙钛矿型化合物的压电陶瓷组合物中含有Cr，Al，Si。 优选地，Cr，Al和Si分别以Cr 2 Al 3 O 3含量为0.05〜0.50重量％，含量为0.005〜1.500重量％ 以Al 2 O 3 3计，含量为0.005〜0.100重量％，以SiO 2 2计。 通过同时包含这三个要素并将其内容设定在上述范围内，机电耦合系数kt可以为30％以上，作为施加前后的谐振频率Fr的变化率的DeltaFr 外部热冲击的绝对值可以为0.5％以下。

    Piezoelectric ceramic material
    8.
    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

    申请人： Masaru Nanao ,  Masakazu Hirose ,  Takeo Tsukada

    发明人： Masaru Nanao ,  Masakazu Hirose ,  Takeo Tsukada

    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

    Piezoelectric ceramic composition
    9.
    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

    申请人： Takeo Tsukada ,  Masahito Furukawa

    发明人： Takeo Tsukada ,  Masahito Furukawa

    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
    10.
    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

    申请人： Takahiro Nakano ,  Masaru Nanao ,  Hideya Sakamoto ,  Takeo Tsukada

    发明人： Takahiro Nakano ,  Masaru Nanao ,  Hideya Sakamoto ,  Takeo Tsukada

    IPC分类号： H01G4/12 ,  C04B35/638 ,  H01L41/083 ,  H01L41/187 ,  H01L41/22 ,  H01L41/273 ,  H01L41/297 ,  H01G4/06

    CPC分类号： B32B18/00 ,  C04B35/491 ,  C04B35/638 ,  C04B2235/656 ,  C04B2235/6582 ,  C04B2235/6584 ,  C04B2235/6588 ,  C04B2235/721 ,  C04B2237/34 ,  C04B2237/346 ,  C04B2237/407 ,  H01L41/083 ,  H01L41/273

    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。