公开(公告)号：US06891316B2

公开(公告)日：2005-05-10

申请号：US10648040

申请日：2003-08-26

申请人： Yoshihiro Yuu ,  Shuzo Iwashita ,  Daisuke Takahashi

发明人： Yoshihiro Yuu ,  Shuzo Iwashita ,  Daisuke Takahashi

IPC分类号： B41J2/045 ,  B41J2/055 ,  B41J2/14 ,  B41J2/16 ,  H01L41/047 ,  H01L41/083 ,  H01L41/09 ,  H01L41/187 ,  H01L41/08

CPC分类号： B41J2/1632 ,  B41J2/14233 ,  B41J2/161 ,  B41J2/1623 ,  B41J2/1642 ,  B41J2002/14266 ,  B41J2002/14459 ,  B41J2202/03 ,  H01L41/0477 ,  H01L41/0973

摘要： The laminated piezoelectric element having a thickness of 100 μm or less of the present invention comprises a laminate which comprises a plurality of piezoelectric ceramic layers 1, and electrodes 2,3 provided the surface and the inside of the laminate, wherein the electrode 2 comprises a silver-palladium alloy containing 71 to 99.9% by volume of silver and 0.1 to 29% by volume of palladium.

摘要翻译： 本发明的厚度为100μm以下的叠层型压电元件包括​​层压体，其包含多个压电陶瓷层1，电极2,3设置在层压体的表面和内部，其中电极2包括： 含有71〜99.9体积％的银和0.1〜29体积％的钯的银 - 钯合金。

公开(公告)号：US08100515B2

公开(公告)日：2012-01-24

申请号：US12532982

申请日：2008-03-18

申请人： Shuzo Iwashita ,  Yoshihiro Yuu

发明人： Shuzo Iwashita ,  Yoshihiro Yuu

IPC分类号： B41J2/045 ,  H01L41/187 ,  H01L41/047

CPC分类号： B41J2/14233 ,  B41J2002/14266 ,  B41J2002/14459 ,  H01L41/081 ,  H01L41/083 ,  H01L41/0973 ,  H01L41/1876 ,  H01L41/273

摘要： A multilayer piezoelectric actuator and a liquid discharge head are provided which are equipped with dense piezoelectric ceramics having improved insulation performance. The multilayer piezoelectric actuator comprises a multilayered body comprising a plurality of piezoelectric ceramic layers containing a PZT phase as a main crystal phase; and an electrode layer containing Ag, which is disposed at least one of on the surface and in the interior of the multilayered body. A lattice constant c of c-axis of the PZT phase is 0.4085 nm to 0.4100 nm, and a ratio of the lattice constant c of the c-axis of the PZT phase and a lattice constant a of a-axis, namely, the ratio c/a, is 1.011 or more. A second phase containing Ag different from the PZT phase is not substantially contained in the piezoelectric ceramic layer. A Zn2SiO4 phase is contained at grain boundaries of the PZT phase, and a Pb2SiO4 phase is not substantially contained at the grain boundaries of the PZT phase.

摘要翻译： 提供了具有提高的绝缘性能的致密压电陶瓷的多层压电致动器和液体排出头。 所述多层压电致动器包括多层体，所述多层体包含多个以PZT相为主晶相的压电陶瓷层; 以及包含Ag的电极层，其设置在多层体的表面和内部中的至少一个上。 PZT相的c轴的晶格常数c为0.4085nm〜0.4100nm，PZT相的c轴的晶格常数c与a轴的晶格常数a的比，即比例 c / a，是1.011以上。 包含不同于PZT相的Ag的第二相基本上不包含在压电陶瓷层中。 在PZT相的晶界处含有Zn2SiO4相，并且在PZT相的晶界处基本上不含Pb2SiO4相。

公开(公告)号：US20100225710A1

公开(公告)日：2010-09-09

申请号：US12532982

申请日：2008-03-18

申请人： Shuzo Iwashita ,  Yoshihiro Yuu

发明人： Shuzo Iwashita ,  Yoshihiro Yuu

IPC分类号： B41J2/045 ,  H01L41/187 ,  H01L41/047

CPC分类号： B41J2/14233 ,  B41J2002/14266 ,  B41J2002/14459 ,  H01L41/081 ,  H01L41/083 ,  H01L41/0973 ,  H01L41/1876 ,  H01L41/273

摘要： A multilayer piezoelectric actuator and a liquid discharge head are provided which are equipped with dense piezoelectric ceramics having improved insulation performance. The multilayer piezoelectric actuator comprises a multilayered body comprising a plurality of piezoelectric ceramic layers containing a PZT phase as a main crystal phase; and an electrode layer containing Ag, which is disposed at least one of on the surface and in the interior of the multilayered body. A lattice constant c of c-axis of the PZT phase is 0.4085 nm to 0.4100 nm, and a ratio of the lattice constant c of the c-axis of the PZT phase and a lattice constant a of a-axis, namely, the ratio c/a, is 1.011 or more. A second phase containing Ag different from the PZT phase is not substantially contained in the piezoelectric ceramic layer. A Zn2SiO4 phase is contained at grain boundaries of the PZT phase, and a Pb2SiO4 phase is not substantially contained at the grain boundaries of the PZT phase.

摘要翻译： 提供了具有提高的绝缘性能的致密压电陶瓷的多层压电致动器和液体排出头。 所述多层压电致动器包括多层体，所述多层体包含多个以PZT相为主晶相的压电陶瓷层; 以及包含Ag的电极层，其设置在多层体的表面和内部中的至少一个上。 PZT相的c轴的晶格常数c为0.4085nm〜0.4100nm，PZT相的c轴的晶格常数c与a轴的晶格常数a的比，即比例 c / a，是1.011以上。 包含不同于PZT相的Ag的第二相基本上不包含在压电陶瓷层中。 在PZT相的晶界处含有Zn2SiO4相，并且在PZT相的晶界处基本上不含Pb2SiO4相。

公开(公告)号：US07244389B2

公开(公告)日：2007-07-17

申请号：US10722157

申请日：2003-11-25

申请人： Shuzo Iwashita ,  Shinichi Handa

发明人： Shuzo Iwashita ,  Shinichi Handa

IPC分类号： H01L41/00 ,  H02N2/00

CPC分类号： B41J2/14209 ,  B41J2/1609 ,  B41J2/1623 ,  B41J2/1632 ,  B41J2/1642 ,  B41J2002/14217 ,  B41J2002/14225 ,  H01L41/1876 ,  H01L41/314 ,  H01L41/43

摘要： The present invention provides piezoelectric ceramics having a thickness of 100 μm or less, surface flatness of 20 μm or less and maximum surface uneveness of 3 μm or less in arbitrary surface region, wherein in-plane variation in dielectric constant is 5% or less of an average dielectric constant. The piezoelectric ceramics are applied to an actuator used for a painting head because of small surface flatness and less in-plane variation in piezoelectric constant.

摘要翻译： 本发明提供了任意表面区域的厚度为100μm以下，表面平坦度为20μm以下，最大表面凹凸为3μm以下的压电陶瓷，其中介电常数的面内变化为5％以下 平均介电常数。 压电陶瓷由于表面平坦度小，压电常数的平面内变化小而被应用于用于喷涂头的致动器。

公开(公告)号：US08210630B2

公开(公告)日：2012-07-03

申请号：US13022491

申请日：2011-02-07

申请人： Shuzo Iwashita ,  Sin Ishikura ,  Takayuki Yamamoto ,  Hisamitsu Sakai

发明人： Shuzo Iwashita ,  Sin Ishikura ,  Takayuki Yamamoto ,  Hisamitsu Sakai

IPC分类号： B41J29/38 ,  B41J2/045 ,  H01L41/00 ,  H02N2/00

CPC分类号： B41J2/14233 ,  B41J2/04525 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2002/14266

摘要： A method for driving a liquid ejector (1) provided with a piezoelectric actuator (7) including a piezoelectric ceramic layer (6) having a size covering a plurality of pressurizing chambers (2). An arbitrary piezoelectric deformation region (8) of the liquid ejector (1) is deflected in one thickness direction and the opposite direction individually by applying a driving voltage waveform including a first voltage (−VL) and an equivalent second voltage (+VL) of the opposite polarity in order to vary the volume of the pressurizing chambers (2) of a corresponding liquid droplet ejecting portion (4), and a liquid droplet is ejected through a communicating nozzle (3). Since gradual creep deformation of the inactive region (16) of the piezoelectric ceramic layer (6) is prevented, the ink droplet ejection performance is maintained at a good level over a long period.

摘要翻译： 一种用于驱动液体喷射器（1）的方法，该液体喷射器（1）设置有包括具有覆盖多个加压室（2）的尺寸的压电陶瓷层（6）的压电致动器（7）。 液体喷射器（1）的任意的压电变形区域（8）通过施加包括第一电压（-VL）和第二电压（-VL）的驱动电压波形而在一个厚度方向和相反方向上分别偏转 相反的极性，以改变相应的液滴喷射部分（4）的加压室（2）的体积，并且液滴通过连通喷嘴（3）喷射。 由于防止了压电陶瓷层（6）的非活性区域（16）的逐渐蠕变变形，所以墨滴喷射性能长时间保持在良好的水平。

公开(公告)号：US07896456B2

公开(公告)日：2011-03-01

申请号：US11993010

申请日：2006-06-23

申请人： Shuzo Iwashita ,  Sin Ishikura ,  Takayuki Yamamoto ,  Hisamitsu Sakai

发明人： Shuzo Iwashita ,  Sin Ishikura ,  Takayuki Yamamoto ,  Hisamitsu Sakai

IPC分类号： B41J29/38 ,  B41J2/045 ,  H01L41/00 ,  H02N2/00

CPC分类号： B41J2/14233 ,  B41J2/04525 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2002/14266

摘要： A method for driving a liquid drop ejector (1) equipped with a piezoelectric actuator (7) including a piezoelectric ceramic layer (6) having a size covering a plurality of pressurizing chambers (2). An arbitrary piezoelectric deformation region (8) of the liquid drop ejector (1) is deflected in one thickness direction and the opposite direction, respectively, by applying a driving voltage waveform including a first voltage (−VL) and an equivalent second voltage (+VL) of the opposite polarity in order to vary the volume of the pressurizing chambers (2) of a corresponding liquid drop ejecting portion (4), and a liquid drop is ejected through a communicating nozzle (3). Since gradual creep deformation of the inactive region (16) of the piezoelectric ceramic layer (6) is prevented, the ink drop ejection performance is maintained at a good level over a long term.

摘要翻译： 一种用于驱动装有压电致动器（7）的液滴喷射器（1）的方法，所述压电致动器包括具有覆盖多个加压室（2）的尺寸的压电陶瓷层（6）。 通过施加包括第一电压（-VL）和等效第二电压（+）的驱动电压波形，液滴喷射器（1）的任意压电变形区域（8）分别沿一个厚度方向和相反方向偏转， VL），以改变相应的液滴喷射部分（4）的加压室（2）的体积，并且通过连通喷嘴（3）喷射液滴。 由于防止压电陶瓷层（6）的非活性区域（16）的逐渐蠕变变形，所以墨滴喷射性能长期保持在良好的水平。

公开(公告)号：US20100118072A1

公开(公告)日：2010-05-13

申请号：US11993010

申请日：2006-06-23

申请人： Shuzo Iwashita ,  Sin Ishikura ,  Takayuki Yamamoto ,  Hisamitsu Sakai

发明人： Shuzo Iwashita ,  Sin Ishikura ,  Takayuki Yamamoto ,  Hisamitsu Sakai

IPC分类号： B41J29/38

CPC分类号： B41J2/14233 ,  B41J2/04525 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2002/14266

摘要： A method for driving a liquid drop ejector (1) equipped with a piezoelectric actuator (7) including a piezoelectric ceramic layer (6) having a size covering a plurality of pressurizing chambers (2). An arbitrary piezoelectric deformation region (8) of the liquid drop ejector (1) is deflected in one thickness direction and the opposite direction, respectively, by applying a driving voltage waveform including a first voltage (−VL) and an equivalent second voltage (+VL) of the opposite polarity in order to vary the volume of the pressurizing chambers (2) of a corresponding liquid drop ejecting portion (4), and a liquid drop is ejected through a communicating nozzle (3). Since gradual creep deformation of the inactive region (16) of the piezoelectric ceramic layer (6) is prevented, the ink drop ejection performance is maintained at a good level over a long term.

摘要翻译： 一种用于驱动装有压电致动器（7）的液滴喷射器（1）的方法，所述压电致动器包括具有覆盖多个加压室（2）的尺寸的压电陶瓷层（6）。 通过施加包括第一电压（-VL）和等效第二电压（+）的驱动电压波形，液滴喷射器（1）的任意压电变形区域（8）分别沿一个厚度方向和相反方向偏转， VL），以改变相应的液滴喷射部分（4）的加压室（2）的体积，并且通过连通喷嘴（3）喷射液滴。 由于防止压电陶瓷层（6）的非活性区域（16）的逐渐蠕变变形，所以墨滴喷射性能长期保持在良好的水平。