Patent application number | Description | Published |
20080211881 | PIEZOELECTRIC MEMBER, PIEZOELECTRIC ELEMENT, AND LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE APPARATUS UTILIZING PIEZOELECTRIC ELEMENT - The invention provides a piezoelectric film having a large piezoelectric property, and a piezoelectric element, a liquid discharge head and a liquid discharge apparatus utilizing the same. The piezoelectric film is formed by an epitaxial oxide of <100> orientation having at least a tetragonal crystal structure, in which the oxide is a perovskite type composite oxide represented by a general formula ABO | 09-04-2008 |
20080307622 | Method for producing piezoelectric film actuator, and composite structure having piezoelectric layer - A method for producing a piezoelectric film actuator is provided. This method includes the steps of preparing an intermediate transfer member having a porous layer formed thereon, with a vibrating plate and a piezoelectric layer being provided on the porous layer; bonding the vibrating plate to a nozzle substrate to form a composite structure; and separating the intermediate transfer member from the composite structure at the porous layer to transfer the vibrating plate and the piezoelectric layer to the nozzle substrate. | 12-18-2008 |
20090026408 | PIEZOELECTRIC MATERIAL - 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)O | 01-29-2009 |
20090091215 | PIEZOELECTRIC ACTUATOR AND LIQUID DISCHARGE HEAD USING THE SAME - The piezoelectric actuator includes a piezoelectric film between two electrode layers and a diaphragm. Assuming that: each elastic coefficient of all materials is isotropic and a distortion amount of the piezoelectric film by an electric field is isotropic in all in-plane directions; a point located on a diaphragm surface and having a maximum displacement when a predetermined electric field is applied to distort the piezoelectric film, is expressed by Pδ | 04-09-2009 |
20090273257 | PIEZOELECTRIC SUBSTANCE, PIEZOELECTRIC ELEMENT, AND LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE APPARATUS USING PIEZOELECTRIC ELEMENT - A piezoelectric substance which is made of oxide with perovskite type structure which is made of ABO | 11-05-2009 |
20090320256 | PIEZOELECTRIC SUBSTRATE, PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE APPARATUS - A piezoelectric substrate of a perovskite-type oxide is expressed by a general formula of ABO | 12-31-2009 |
20100025617 | METAL OXIDE - Provided is a piezoelectric material excellent in piezoelectricity. The piezoelectric material includes a perovskite-type complex oxide represented by the following General Formula (1). | 02-04-2010 |
20100225712 | INKJET HEAD AND METHOD FOR MANUFACTURING THE SAME - A method for manufacturing an inkjet head includes providing a piezoelectric substrate having a porous structure, a diaphragm on the porous structure, and a piezoelectric substance layer on the diaphragm, and forming a cavity by etching out the porous structure from the piezoelectric substrate. | 09-09-2010 |
20100231096 | PIEZOELECTRIC MATERIAL, METHOD OF MANUFACTURING THE SAME, AND PIEZOELECTRIC DEVICE - Provided is a piezoelectric material having a good piezoelectric property and Curie temperature (Tc) of 150° C. or higher, and a piezoelectric device using the piezoelectric material. The piezoelectric material includes a sintered body made of a perovskite-type metal oxide represented by the following general formula (1): xBi(Mg | 09-16-2010 |
20110012050 | PIEZOELECTRIC MATERIAL - Provided is a piezoelectric material including a lead-free perovskite-type composite oxide which is excellent in piezoelectric characteristics and temperature characteristics and is represented by the general formula (1): | 01-20-2011 |
20110018945 | PIEZOELECTRIC ELEMENT, INK JET HEAD AND PRODUCING METHOD FOR PIEZOELECTRIC ELEMENT - A piezoelectric element comprises a piezoelectric film disposed on a substrate and a pair of electrodes disposed in contact with the piezoelectric film and utilizing a bending mode. The piezoelectric film includes domains constituted of a tetragonal crystal and including an a-domain which is formed by a crystal having a (100) plane parallel to the film surface of the piezoelectric film, the a-domains include an A-domain having a normal axis of (001) plane substantially parallel to a principal bending direction of the piezoelectric film and a B-domain having a normal axis of (001) plane substantially perpendicular to the principal bending direction of the piezoelectric film, and the A-domains have a volume proportion larger than 50 vol % with respect to the sum of the volume of the A-domains and the volume of the B-domains. | 01-27-2011 |
20110079883 | FERROELECTRIC THIN FILM - Provided is a ferroelectric thin film formed on a substrate and having an amount of remanent polarization increased in its entirety. The ferroelectric thin film contains a perovskite-type metal oxide formed on a substrate, the ferroelectric thin film containing a column group formed of multiple columns each formed of a spinel-type metal oxide, in which the column group is in a state of standing in a direction perpendicular to a surface of the substrate, or in a state of slanting at a slant angle in a range of −10° or more to +10° or less with respect to the perpendicular direction. | 04-07-2011 |
20110120494 | DUST REMOVING DEVICE AND DUST REMOVING METHOD - In a piezoelectric device, a first electrode and a second electrode are disposed to be opposed to each other on plate surfaces of the piezoelectric device, a first electrode plane of the piezoelectric device is fixedly bonded to a plate surface of a vibrating plate, a piezoelectric material forming the piezoelectric device is polarized in a direction parallel to the first electrode plane, the piezoelectric device is fixed to a base through a second electrode plane of the piezoelectric device, and the piezoelectric device generates a thickness-shear vibration with the fixed second electrode plane being a reference plane. The piezoelectric vibration generated by the piezoelectric device generates a flexural vibration in the vibrating plate, to thereby remove dust adhering to a surface of the vibrating plate. | 05-26-2011 |
20110128327 | PIEZOELECTRIC CERAMIC, METHOD FOR MAKING THE SAME, PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, AND ULTRASONIC MOTOR - A piezoelectric ceramic that includes barium titanate and 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate. The piezoelectric ceramic is composed of crystal grains. The crystal grains include crystal grains A having an equivalent circular diameter of 30 μm or more and 300 μm or less and crystal grains B having an equivalent circular diameter of 0.5 μm or more and 3 μm or less. The crystal grains A and the crystal grains B individually form aggregates and the aggregates of the crystal grains A and the aggregates of the crystal grains B form a sea-island structure. | 06-02-2011 |
20110268965 | PIEZOELECTRIC MATERIAL - Provided is a piezoelectric material having a high Curie temperature and satisfactory piezoelectric characteristics, the piezoelectric material being represented by the following general formula (1): | 11-03-2011 |
20120032557 | VIBRATION GENERATING DEVICE, DRIVING METHOD THEREFOR, FOREIGN SUBSTANCE REMOVING DEVICE, AND OPTICAL DEVICE - Provided is a vibration generating device in which more improvement of drive efficiency can be realized than conventional ones. The vibration generating device includes: a piezoelectric element including a piezoelectric material interposed between electrodes; a vibration member; a power source for applying an alternating voltage to the piezoelectric element; and a control section for controlling a frequency of the alternating voltage applied by the power source, in which the control section controls the frequency of the alternating voltage applied to the piezoelectric element so that the resonance frequency of the piezoelectric element is successively changed from low frequency side to high frequency side in a frequency range including a change range of a resonance frequency of the piezoelectric element. | 02-09-2012 |
20130020525 | PIEZOELECTRIC MATERIAL, METHOD OF MANUFACTURING THE SAME, AND PIEZOELECTRIC DEVICE - Provided is a piezoelectric material having good piezoelectric properties and a Curie temperature (Tc) of 150° C. or higher, and a piezoelectric device using the piezoelectric material. The piezoelectric material includes a sintered body made of a perovskite-type metal oxide represented by the following general formula (1): xBi(Mg | 01-24-2013 |
20130100531 | PIEZOELECTRIC DEVICE, DUST REMOVING APPARATUS, AND IMAGING APPARATUS - A piezoelectric device includes an elastic member, an electrical-mechanical energy conversion element fixed to the elastic member, configured to cause the elastic member to generate vibration, and a supporting member that supports the elastic member. The electrical-mechanical energy conversion element is formed of a piezoelectric material in which, in a usage temperature range of the piezoelectric device, a piezoelectric constant decreases along with temperature rise. A supporting member that supports the elastic member is formed of a material in which, in the usage temperature range of the piezoelectric device, Q value increases along with temperature rise. | 04-25-2013 |
20130206164 | DUST REMOVING DEVICE AND DUST REMOVING METHOD - In a piezoelectric device, a first electrode and a second electrode are disposed to be opposed to each other on plate surfaces of the piezoelectric device, a first electrode plane of the piezoelectric device is fixedly bonded to a plate surface of a vibrating plate, a piezoelectric material forming the piezoelectric device is polarized in a direction parallel to the first electrode plane, the piezoelectric device is fixed to a base through a second electrode plane of the piezoelectric device, and the piezoelectric device generates a thickness-shear vibration with the fixed second electrode plane being a reference plane. The piezoelectric vibration generated by the piezoelectric device generates a flexural vibration in the vibrating plate, to thereby remove dust adhering to a surface of the vibrating plate. | 08-15-2013 |
20130214639 | PIEZOELECTRIC CERAMIC, METHOD FOR MAKING THE SAME, PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, AND ULTRASONIC MOTOR - A piezoelectric ceramic that includes barium titanate and 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate. The piezoelectric ceramic is composed of crystal grains. The crystal grains include crystal grains A having an equivalent circular diameter of 30 μm or more and 300 μm or less and crystal grains B having an equivalent circular diameter of 0.5 μm or more and 3 μm or less. The crystal grains A and the crystal grains B individually form aggregates and the aggregates of the crystal grains A and the aggregates of the crystal grains B form a sea-island structure. | 08-22-2013 |
20130241347 | PIEZOELECTRIC CERAMICS, MANUFACTURING METHOD THEREFOR, PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, ULTRASONIC MOTOR, AND DUST REMOVAL DEVICE - Provided are a barium titanate-based piezoelectric ceramics having satisfactory piezoelectric performance and a satisfactory mechanical quality factor (Q | 09-19-2013 |
20130250417 | VIBRATING APPARATUS, DRIVING APPARATUS HAVING THE VIBRATING APPARATUS, AND OPTICAL DEVICE - A vibration apparatus includes a vibrating body that includes a piezoelectric material having a lead content of less than 1000 ppm, and has an electromechanical energy converting element having an electrode; and a control unit that applies at least two driving voltages to the electromechanical energy converting element, and generates a combined vibration by providing a time phase difference to the vibrating body and generating multiple stable waves having mutually different orders; wherein the control unit changes at least one of the voltage amplitude ratio and time phase difference of at least two driving voltages, so as to change the amplitude distribution of the combined vibration. | 09-26-2013 |
20130286274 | DUST REMOVING DEVICE AND IMAGE PICKUP APPARATUS - A dust removing device generates vibrations at least at a wavelength λ in a vibrating member by applying alternating voltages to a first piezoelectric element and a second piezoelectric element, respectively. The first piezoelectric element is provided on a first surface of the vibrating member that is on a side having a target surface. The second piezoelectric element is provided on a second surface of the vibrating member that is opposite the first surface. When the first piezoelectric element and the second piezoelectric element are projected in a direction that is normal to the target surface, a distance dL | 10-31-2013 |
20130330541 | METAL OXIDE - Provided is a piezoelectric material excellent in piezoelectricity. The piezoelectric material includes a perovskite-type complex oxide represented by the following General Formula (1). | 12-12-2013 |
20140009038 | PIEZOELETRIC CERAMIC, METHOD FOR MAKING SAME, PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, ULTRASONIC MOTOR, AND DUST CLEANER - A barium titanate piezoelectric ceramic having good piezoelectric properties and mechanical strength and a piezoelectric element that includes the ceramic are provided. A method for making a piezoelectric ceramic includes forming a compact composed of an oxide powder containing barium titanate particles, sintering the compact, and decreasing the temperature of the compact after the sintering. The sintering includes (A) increasing the temperature of the compact to a first temperature within a temperature range of a shrinking process of the compact; (B) increasing the temperature of the compact to a second temperature within a temperature range of a liquid phase sintering process of the compact after (A); (C) decreasing the temperature of the compact to a third temperature within the temperature range of the shrinking process of the compact after (B); and (D) retaining the third temperature after (C). | 01-09-2014 |
20140084750 | PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, ULTRASONIC MOTOR, AND DUST REMOVING DEVICE - A piezoelectric element having an improved piezoelectric constant is provided, and a liquid discharge head, an ultrasonic motor, and a dust removing device, each of which uses the above piezoelectric element, are also provided. A piezoelectric element at least includes a pair of electrodes and a piezoelectric material provided in contact with the pair of electrodes, the piezoelectric material is formed of an aggregate of crystal grains containing barium titanate as a primary component, and among the crystal grains of the aggregate, crystal grains at least in contact with the electrodes have dislocation layers in the grains. A liquid discharge head, an ultrasonic motor, and a dust removing device each use the above piezoelectric element. | 03-27-2014 |
20140218588 | DUST REMOVING DEVICE AND IMAGING DEVICE - Provided is a dust removing device that can be designed and controlled appropriately and has high dust removal performance even at low temperature, and an imaging device using the dust removing device. In a dust removing device to be set on a base, including a piezoelectric element formed of a piezoelectric material and a pair of opposing electrodes, a vibration member, and a fixation member containing at least a high molecular compound component, a phase transition temperature T from a first ferroelectric crystal phase to a second ferroelectric crystal phase of the piezoelectric material is set to −60° C.≦T≦−5° C., and whereby, the dust removing device can be designed and controlled appropriately and high dust removal performance can be obtained even at low temperature. | 08-07-2014 |
20150028249 | PIEZOELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT, LIQUID EJECTION HEAD, ULTRASONIC MOTOR, AND DUST REMOVING DEVICE - Provided is a lead-free piezoelectric ceramics having enhanced mechanical quality factor (Qm) and mechanical strength. The piezoelectric ceramics, includes at least a first crystal grain and a second crystal grain. The first crystal grain has an average equivalent circle diameter of 2 μm or more and 30 μm or less. The first crystal grain includes a perovskite-type metal oxide represented by the following general formula (1) as a main component, and the second crystal grain includes a perovskite-type metal oxide represented by the following general formula (2) as a main component: (1) xBaTiO | 01-29-2015 |
20150062257 | SODIUM NIOBATE POWDER, METHOD FOR PRODUCING THE SAME, METHOD FOR PRODUCING CERAMIC, AND PIEZOELECTRIC ELEMENT - A sodium niobate powder includes sodium niobate particles having a shape of a cuboid and having a side average length of 0.1 μm or more and 100 μm or less, wherein at least one face of each of the sodium niobate particles is a (100) plane in the pseudocubic notation and a moisture content of the sodium niobate powder is 0.15 mass % or less. A method for producing a ceramic using the sodium niobate powder is provided. A method for producing a sodium niobate powder includes a step of holding an aqueous alkali dispersion liquid containing a niobium component and a sodium component at a pressure exceeding 0.1 MPa, a step of isolating a solid matter from the aqueous dispersion liquid after the holding, and a step of heat treating the solid matter at 500° C. to 700° C. | 03-05-2015 |