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    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 composition
    5.
    发明授权
    Piezoelectric ceramic composition 失效
    压电陶瓷组合物

    公开(公告)号：US6004474A

    公开(公告)日：1999-12-21

    申请号：US40310

    申请日：1998-03-18

    申请人： Tadashi Takenaka ,  Masakazu Hirose ,  Kazuo Miyabe

    发明人： Tadashi Takenaka ,  Masakazu Hirose ,  Kazuo Miyabe

    IPC分类号： C04B35/495 ,  H01G4/12 ,  C04B35/453

    CPC分类号： H01L41/187 ,  C04B35/495 ,  H01G4/1227

    摘要： One object of the present invention is to provide a lead-free piezoelectric material excellent in piezoelectric characteristics and superior from the viewpoints of prevention of environmental pollution, protection of environments and ecology. To achieve the object, a piezoelectric ceramic composition is constructed from a piezoelectric ceramic composition within a region in case of being represented by the formula:x[Bi.sub.1/2 Na.sub.1/2 ]TiO.sub.3 -y[MeNbO.sub.3 ]-(z/2)[Bi.sub.2 O.sub.3.Sc.sub.2 O.sub.3 ](wherein Me is K or Na)wherein X, y and z satisfy the following conditions:x+y+z=1, 0

    摘要翻译： 本发明的一个目的是提供一种压电特性优异的无铅压电材料，并且从防止环境污染，环境保护和生态学的观点出发优越。 为了实现该目的，在由下式表示的区域内由压电陶瓷组合物构成压电陶瓷组合物：x [Bi1 / 2Na1 / 2] TiO3-y [MeNbO3] - （z / 2）[Bi2O3 （其中Me是K或Na）其中X，Y和z满足以下条件：x + y + z = 1,0

    PIEZOELECTRIC CERAMIC COMPOSITION AND RESONATOR
    6.
    发明申请
    PIEZOELECTRIC CERAMIC COMPOSITION AND RESONATOR 审中-公开
    压电陶瓷组合物和谐振器

    公开(公告)号：US20080258100A1

    公开(公告)日：2008-10-23

    申请号：US11851415

    申请日：2007-09-07

    申请人： Keisuke Teranishi ,  Masakazu Hirose ,  Tomohisa Azuma

    发明人： Keisuke Teranishi ,  Masakazu Hirose ,  Tomohisa Azuma

    IPC分类号： C04B35/36

    CPC分类号： C04B35/493 ,  C04B2235/3217 ,  C04B2235/3251 ,  C04B2235/3262 ,  H01L41/187 ,  H03H9/02031 ,  H03H9/1035 ,  H03H9/176

    摘要： To obtain a piezoelectric ceramic composition having extremely high heat resisting property. Provided is a piezoelectric ceramic composition comprising a main component represented by Pba[(MnbNbc)dTieZrf]O3 (wherein 0.98≦a≦1.01, 0.340≦b≦0.384, 0.616≦c≦0.660, 0.08≦d≦0.12, 0.500≦e≦0.540, 0.37≦f≦0.41, bd+cd+e+f=1), and 1 to 10% by weight of Al in terms of Al2O3 as an additive. Preferably, b is such that 0.345≦b≦0.375 and c is such that 0.625≦c≦0.655, and the Al as the additive is preferably 2 to 6% by weight in terms of Al2O3.

    摘要翻译： 得到具有极高耐热性的压电陶瓷组合物。 本发明提供一种压电陶瓷组合物，其包含以下组分表示的主要成分：[（N，B）Nb C' （其中0.98 <= a <= 1.01,0.340 <= b <= 0.384,0.616 <= c 根据这个术语，<= 0.660,0.08 <= d <= 0.12,0.500 <= e <= 0.540,0.37 <= f <= 0.41，bd + cd + e + f = 1）和1〜10重量％ 的Al 2 O 3 3作为添加剂。 优选地，b为0.345≤b≤0.375，c为0.625 <= c <= 0.655，作为添加剂的Al优选为2〜6重量％ 3＆gt; 3＆lt; 3＆gt ;.

    Data output circuit with reduced output noise
    8.
    发明申请
    Data output circuit with reduced output noise 失效

    公开(公告)号：US20060028237A1

    公开(公告)日：2006-02-09

    申请号：US11223937

    申请日：2005-09-13

    申请人： Hideto Hidaka ,  Masakazu Hirose

    发明人： Hideto Hidaka ,  Masakazu Hirose

    IPC分类号： H03K19/003

    CPC分类号： H03K19/00361

    摘要： A data output drive transistor is rendered conductive when the potential of an internal node attains an H level, whereby an output node is discharged to the level of ground potential. When the drive transistor is turned on, the output node is discharged to the level of ground potential at high speed. This drive transistor is turned on for a predetermined time period when output of a high level data is completed, whereby the output node is discharged to the level of the ground potential for a predetermined time period. As a result, the potential of the output node is lowered from a high level to an intermediate level, so that the amplitude of a subsequent output signal is reduced. An output circuit that can effectively prevent generation of ringing with no increase in the access time is provided. A countermeasure is provided to suppress a ringing at output node which drives the output node at high speed when the output node potential attains a potential at which no ringing is caused. A stable output signal is provided at high speed.