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    • 44. 发明授权
    • Piezoelectric material
    • 压电材料
    • US08480918B2
    • 2013-07-09
    • US12135980
    • 2008-06-09
    • Kaoru MiuraToshihiro IfukuKenichi TakedaTetsuro FukuiHiroshi Funakubo
    • Kaoru MiuraToshihiro IfukuKenichi TakedaTetsuro FukuiHiroshi Funakubo
    • B06B1/06
    • H01L41/1871H01L41/43
    • The present invention provides a piezoelectric material which can be applied even to the MEMS technique, exhibits satisfactory piezoelectricity even at high ambient temperatures and is environmentally clean, namely, a piezoelectric material including an oxide obtained by forming a solid solution composed of two perovskite oxides A(1)B(1)O3 and A(2)B(2)O3 different from each other in crystalline phase, the oxide being represented by the following general formula (1): X{A(1)B(1)O3}−(1−X){A(2)B(2)O3}  (1) wherein “A(1)” and “A(2)” are each an element including an alkali earth metal and may be the same or different from each other; “B(1)” and “B(2)” each include two or more metal elements, and either one of “B(1)” and “B(2)” contains Cu in a content of 3 atm % or more; and “X” satisfies the relation 0
    • 本发明提供一种甚至可以应用于MEMS技术的压电材料,即使在高环境温度下也表现出令人满意的压电性,并且是环境清洁的,即包括通过形成由两种钙钛矿氧化物A形成的固溶体获得的氧化物的压电材料 (1)B(1)O 3和A(2)B(2)O 3在结晶相中彼此不同,氧化物由以下通式(1)表示:X {A(1)B(1)O 3 } - (1-X){A(2)B(2)O3}(1)其中“A(1)”和“A(2)”分别是包含碱土金属的元素, 彼此不同; “B(1)”和“B(2)”各自包含两个或更多个金属元素,“B(1)”和“B(2)”中的任一个含有3atm%以上的Cu; 和“X”满足0
    • 45. 发明授权
    • Liquid-ejecting head, liquid-ejecting apparatus, and actuator
    • 液体喷射头,液体喷射装置和致动器
    • US08277031B2
    • 2012-10-02
    • US12754675
    • 2010-04-06
    • Koji Sumi
    • Koji Sumi
    • B41J2/045
    • B41J2/14233B41J2002/14241B41J2002/14419H01L41/0973H01L41/1871H01L41/1876
    • A liquid-ejecting head includes a flow-passage-forming substrate that includes a pressure-generating chamber, the pressure-generating chamber being in communication with a nozzle through which droplets are ejected, and a piezoelectric element disposed on the flow-passage-forming substrate, the piezoelectric element altering the internal pressure of the pressure-generating chamber. The piezoelectric element includes a piezoelectric layer containing titanium (Ti) and zirconium (Zr), a first electrode, and a second electrode. The first electrode and the second electrode are disposed on the opposite sides of the piezoelectric layer,. The component ratio Ti/(Zr+Ti) of the piezoelectric layer is 0.40 or more but less than 0.50. At least a portion of the piezoelectric layer formed on the first electrode contains tetragonal crystals formed by phase transition under stress caused by an underlying layer.
    • 液体喷射头包括流路形成基板,该流路形成基板包括压力产生室,所述压力发生室与喷射器连通,液滴喷射通过喷嘴,以及设置在流路形成部上的压电元件 基板,压电元件改变压力发生室的内部压力。 压电元件包括​​含有钛(Ti)和锆(Zr)的压电层,第一电极和第二电极。 第一电极和第二电极设置在压电层的相对侧上。 压电层的成分比Ti /(Zr + Ti)为0.40以上且小于0.50。 形成在第一电极上的压电层的至少一部分包含由下层引起的应力下的相变形成的四方晶。
    • 46. 发明申请
    • METHOD OF DRIVING PIEZOELECTRIC DEVICE
    • 驱动压电器件的方法
    • US20120161578A1
    • 2012-06-28
    • US13306495
    • 2011-11-29
    • Akira ShimadaKaishi Ohashi
    • Akira ShimadaKaishi Ohashi
    • H01L41/09
    • H01L41/042H01L41/1871H01L41/1873
    • Provided is a method of driving a piezoelectric device including a piezoelectric material having at least two phase transition temperatures and is polarized in one of thickness directions, and electrodes disposed on both end surfaces of the piezoelectric material in a direction orthogonal to the polarized direction, the method including: applying an alternating electric field to the piezoelectric device by an electric field applying unit; and applying a bias electric field in accordance with a variation of a coercive electric field due to temperature variation so that an absolute value of an electric field in a direction opposite to the polarized direction in the alternating electric field applied by the electric field applying unit becomes smaller than the coercive electric field and so that a polarization of the piezoelectric material is not reversed by the electric field in the direction opposite to the polarized direction.
    • 提供了一种驱动包括具有至少两个相变温度的压电材料并在厚度方向中的一个方向极化的压电装置的方法,以及设置在与偏振方向正交的方向上的压电材料的两个端面上的电极, 方法,包括:通过电场施加单元向压电装置施加交变电场; 以及根据温度变化引起的矫顽电场的变化施加偏置电场,使得由电场施加单元施加的交变电场中与偏振方向相反的方向的电场的绝对值成为 小于矫顽电场,并且使得压电材料的极化不被与偏振方向相反的方向的电场反转。