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Piezoelectric patents

      

This page is updated frequently with new Piezoelectric-related patent applications.




new patent Electroacoustic converter
An electroacoustic converter includes a piezoelectric film whose principal surface expands and contracts according to an electric field, a viscoelastic support which is in close contact with the principal surface of the piezoelectric film, a pressing member which presses the piezoelectric film to the viscoelastic support, and an expandable pressing sheet which is tensioned and in close contact with the surface of the piezoelectric film opposite to the viscoelastic support to press the piezoelectric film and the viscoelastic support. In a section in a predetermined direction perpendicular to the principal surface of the piezoelectric film, the piezoelectric film has a flat portion which is held by the pressing sheet and the viscoelastic support in a portion thereof excluding a pressed portion by the pressing member, and an inclined portion which is connected to the pressed portion and the flat portion and extends in a direction of intersecting the pressed portion.
Fujifilm Corporation


new patent Physical object drop and impact alarm device
The present invention comprises a device which emits an audible sound when it is dropped and impacts upon the ground or other surface. The device is small enough to be easily placed in a user's wallet, on a keychain, or other valuable and will alert the user when these valuables are dropped.

new patent Acoustic wave filter, duplexer, and module
An acoustic wave filter includes: series resonators connected in series; and one or more parallel resonators connected in parallel, wherein at least two series resonators and a parallel resonator therebetween are divided into a first divided resonator, which includes a piezoelectric substance sandwiched between a pair of electrodes in a c-axis orientation direction, and a second divided resonator, which includes another piezoelectric substance sandwiched between another pair of electrodes so that the another pair of electrodes in the c-axis orientation direction has an electric potential opposite to that of the electrodes of the first divided resonator in the c-axis orientation direction, a first group including the first divided resonators and a second group including the second divided resonators are interconnected in parallel between two nodes, and the first divided resonators and the second divided resonators of the at least two series resonators are not electrically interconnected at the two nodes.. .
Taiyo Yuden Co., Ltd.


new patent Hybrid photovoltaic and piezoelectric fiber
The invention provides hybrid photovoltaic-piezoelectric energy harvesting devices in the form of flexible filaments. The devices harvest energy from ambient light, and also from environmental motions and vibrations.

new patent Wireless signal transmitting apparatus and wireless illumination control apparatus using the same
A wireless signal transmitting apparatus, includes: a piezoelectric harvester configured to generate electrical energy responsive to user switch manipulation; and, a wireless communication circuit configured to generate wireless signals from the electrical energy and wirelessly transmit the wireless signals to an external wireless power receiving device.. .
Samsung Electro-mechanics Co., Ltd.


new patent Combined renewable energy and compressed gas energy storage and generator microgrid system using reciprocating piezoelectric generators
A combined heat and power system, namely a portable combined heat and power microgrid system with the capacity to convert air to electricity, since the system imparts excess energy derived from multiple electrical energy sources, namely renewables or other sources of electrical supply like gas-induced electrical generation, to produce and store energy as compressed heat that is then redirected to generate reciprocating energy utilizing a barrel housing or setting to promote direct kinetic energy transfer method onto an array of rowed piezoelectric generators that use sequential direct kinetic energy transference to produce electricity and store it in a second electrical storage unit that can be interconnected to the operational electrical storage unit to not only promote redirect electrical flow during peak or off-peak to extend systemic operations but also to promote high volumes of energy from multiple energy sources for electric user purposes, enabling communication with high density energy when stored.. .

new patent Piezoelectric material piezoelectric element and electronic apparatus
The present invention provides a piezoelectric material not containing lead and potassium, showing satisfactory insulation and piezoelectricity, and having a high curie temperature. The invention relates to a piezoelectric material includes a main component containing a perovskite-type metal oxide represented by formula (1): (naxba1-y)(nbyti1-y)o3 (wherein, 0.80≦x≦0.94 and 0.83≦y≦0.94), and an additive component containing at least one element selected from mn and ni, wherein the content of the ni is 0 mol or more and 0.05 mol or less based on 1 mol of the perovskite-type metal oxide, and the content of the mn is 0 mol or more and 0.005 mol or less based on 1 mol of the perovskite-type metal oxide..
Canon Kabushiki Kaisha


new patent Piezoelectric polymer composite
In a piezoelectric polymer composite in which piezoelectric particles are dispersed in a polymer matrix, the piezoelectric particles include 5 vol % to 30 vol % of particles having a particle size which is 0.25 times to 1 time a thickness of the piezoelectric polymer composite. As a result, the piezoelectric polymer composite exhibits satisfactory piezoelectric characteristics..
Fujifilm Corporation


new patent Drive device for vibrating member, vibration type actuator using the same, and imaging apparatus
When stopping a vibration type actuator at a final target stopping position, driving frequency and phase difference of ac signals input to a piezoelectric element are set in accordance with a first deviation obtained from a command position sequentially determined and a relative position of a vibrating member and driven element, and also pulse duty is adjusted in accordance with a second deviation obtained from a final target stopping position and the relative position.. .
Canon Kabushiki Kaisha


new patent Scanning ion conductance microscopy
A method for interrogating a surface of a sample bathed in electrolyte solution using sicm, comprising: controlling the potential between first and second electrodes bathed in the electrolyte solution to induce an ion current in the electrolyte solution, a submerged portion of the first electrode being contained within a micropipette and the second electrode being external to the micropipette; recording the ion current whilst controlling the micropipette to move with respect to a stage supporting the sample; and determining, from the ion current and calibration data, the surface height profile of the sample. Said potential can be controlled according to a spread spectrum modulated signal.
Openiolabs Ltd


new patent

Downhole acoustic transducer, downhole probe and tool comprising such a transducer

A thickness (ei) of the membrane wall (13) is such that there is a common resonance between the membrane wall and the piezoelectric element thereby achieving high acoustic transmission through the membrane wall (13), and such that the membrane wall (13) is suitable to resist to the hydrocarbon well pressure.. .

new patent

Ultrasound probe

An ultrasound probe including a matching element, a backing layer, a piezoelectric element and a driver is provided. The piezoelectric element is disposed between the matching element and the backing layer.
Qisda Corporation

Mobile terminal

A mobile terminal according to the present disclosure includes a housing member with a first sound hole, a film speaker and a speaker holder with a second sound hole. The film speaker includes a piezoelectric element and a resin film configured to vibrate with the piezoelectric element.
Kyocera Corporation

Piezoelectric drive device and robot

A piezoelectric drive device includes a plurality of piezoelectric vibrating portions that drive a driven member. A difference between the maximum resonance frequency and the minimum resonance frequency in each resonance frequency of the plurality of piezoelectric vibrating portions falls within a range of 0.001% to 5% of an average resonance frequency of the plurality of piezoelectric vibrating portions..
Seiko Epson Corporation

Drum-type wide-frequency piezoelectric power generation apparatus

A drum-type wide-frequency piezoelectric power generation apparatus may include a protective layer pasted on piezoelectric layer through epoxy resin glue or other conductive adhesives. The piezoelectric layer is pasted on the base layer through epoxy resin or other conductive adhesives.
Beijing University Of Technology

Nanopositioner

We describe a nanopositioning device comprising: a mount and a moving stage held within said mount, preferably by sets of flexures on opposite sides of the stage such that the stage is displaceable in a longitudinal direction within said mount. A piezoelectric actuator is mechanically coupled to said stage to controllably displace the stage in a longitudinal direction.
Elektron Technology Uk Limited

Dc-ac power converting circuit

A direct current (dc)-alternating current (ac) power convertor is disclosed. The dc-ac power converting circuit may include an inverter configured to convert the dc power into first output power, a piezoelectric transforming unit including piezoelectric transformers connected in parallel to an output terminal of the inverter, and each piezoelectric transformer of the piezoelectric transformers configured to transform the first output power to second output power, and an output configured to add the second output power output from the each of the piezoelectric transformer and to output ac power, wherein each piezoelectric transformer has a resonance frequency..
Samsung Electro-mechanics Co., Ltd.

Hybrid energy system for general applications

The hybrid energy system for onshore and for offshore applications to include buildings infrastructure, and vessels respectively an assortment one or more arrays of integrated piezoelectric devices, wind turbine array and solar panels characterized in that they are to produce renewable energy for on demand use and for battery bank storage. Accordingly the onshore application includes a kinetic energy turbine farm, and also offshore methods for kinetic energy turbine farms, mega buoys and mega vessels to supply extra electric energy to other vessels and to shunt net power to utility grid companies, and mega-barges produce net power in onboard giant battery bank containers to rent by shipping to utility consignment locations coastally..

Scanner unit, optical fiber scanner, illumination apparatus, and observation apparatus

A scanner unit includes: a tubular elastic part provided with marks outside a prescribed bonding region set on an outer surface thereof and; and a piezoelectric element that is bonded to the bonding region. The piezoelectric element includes: a piezoelectric body having two mutually opposing electrode faces; and marks that are different from each other, respectively provided on the two electrode faces.
Olympus Corporation

Optical fiber scanner, illuminator, and observation apparatus

An optical fiber scanner includes: an elongated optical fiber; driving piezoelectric elements that are provided on an outer circumferential surface of the optical fiber and produce bending oscillation at a distal-end portion of the optical fiber as a result of an alternating voltage being applied thereto; detecting piezoelectric elements provided on the outer circumferential surface at the distal-end portion of the optical fiber; and a control unit that controls an alternating voltage to be applied to the driving piezoelectric elements on the basis of the voltages produced by the detecting piezoelectric elements.. .
Olympus Corporation

Heterogeneous surfaces for patterned bubble arrays, enhanced heat transfer, & advanced heat exhanger applications

Heterogeneous surfaces to tailor bubble nucleation, bubble sites, and bubble dynamics. In some embodiments, piezoelectric inkjet printing is employed to deposit hydrophobic polymer dot arrays having any predetermined pattern.

Liquid ejecting head, liquid ejecting apparatus, and piezoelectric device

A liquid ejecting head includes a flow channel forming substrate that is provided with a space constituting a pressure generating chamber which communicates with nozzle openings, a vibration plate that is stacked on one surface of the flow channel forming substrate and seals the space, and a piezoelectric element that includes a first electrode, a piezoelectric layer, and a second electrode sequentially stacked on a surface of the vibration plate opposite to the flow channel forming substrate, in which the first electrode is formed, in which at least a width of a first direction along the opposite surface is narrower than the space in a region corresponding to the space, the piezoelectric layer is stacked so as to overlap the first electrode and at least a part of the vibration plate in the region corresponding to the space, the second electrode is stacked so as to overlap the piezoelectric layer in the region corresponding to the space, and as a thickness of a stacked direction of the piezoelectric element is a thickness of the piezoelectric layer, a first thickness (d1) of the piezoelectric layer of a part positioned on the first electrode and a second thickness (d2) of the piezoelectric layer of a part positioned on the vibration plate satisfy a relationship of the first thickness (d1)>the second thickness (d2).. .
Seiko Epson Corporation

Inkjet head

An inkjet head includes a substrate that defines a cavity in which ink is stored, a vibrating membrane that is supported by the substrate and that defines the cavity, and a piezoelectric device that is disposed on the vibrating membrane and that changes a volume of the cavity by displacing the vibrating membrane. The piezoelectric device includes a lower electrode, a piezoelectric membrane that is disposed on the lower electrode, and an upper electrode that is disposed on the piezoelectric membrane and that faces the lower electrode with the piezoelectric membrane interposed between the upper electrode and the lower electrode.
Rohm Co., Ltd.

Ink jet head and manufacturing method thereof

An ink jet head includes a base member having a plurality of openings, a diaphragm formed on a surface of the base member covering each of the openings, a pressure chamber being formed at each of the openings, and a plurality of piezoelectric elements formed at locations on the diaphragm corresponding to the pressure chambers, each of the piezoelectric elements being configured to eject liquid from a corresponding pressure chamber by causing deformation of the diaphragm. The diaphragm includes a plurality of stress release portions that reduces compressive residual stress in the diaphragm, each of the stress release portions corresponding to one of the piezoelectric elements..
Toshiba Tec Kabushiki Kaisha

Piezoelectric drive device, robot, and driving piezoelectric drive device

A piezoelectric drive device includes: a piezoelectric vibrating portion including a vibrating body, a piezoelectric element disposed on at least one surface of the vibrating body, and a support portion supporting the vibrating body; an elastic member pressing the vibrating body against a driven member; and a heat conducting member disposed so as to be capable of changing a mutual positional relationship with the elastic member while maintaining a surface-to-surface contact state therewith.. .
Seiko Epson Corporation

Ultrasonic sensor

An ultrasonic sensor including a case having a bottom portion, and a piezoelectric element that is bonded to an inner surface of the bottom portion and performs bending vibration together with the bottom portion. The piezoelectric element includes a piezoelectric layer having a transmission region and a reception region, a common electrode, a transmission electrode opposing the common electrode with the transmission region interposed therebetween, and a reception electrode opposing the common electrode with the reception region interposed therebetween.
Murata Manufacturing Co., Ltd.

Device for generating mechanical vibrations

There is disclosed a mechanical-vibration-generating-device for generating a mechanical vibration, the mechanical vibration having a vibration direction. The mechanical-vibration-generating-device comprises: rigid bushings comprising at least a beginning rigid bushing and a end rigid bushing, at least one axial piezoelectric stack positioned between the beginning rigid bushing and the end rigid bushing, the at least one axial piezoelectric stack having an imaginary axis; the imaginary axis being aligned with the vibration direction, a coupling for interconnecting the beginning rigid bushing and the end rigid bushing, a common internal channel defined in the rigid bushings and the piezoelectric stack, the first connective passage and the second connective passage defined in the rigid bushings providing a fluid path between the common internal channel and an ambient environment, the first connective passage having a first valve and the second connective passage having a second valve, the first valve being configured as an inlet valve and the second valve being configured as an outlet valve..
Obshchestvo S Ogranichennoy Otvetstvennostyu "renk"

Non-planar and non-symmetrical piezoelectric crystals and reflectors

An acoustophoretic device is disclosed. The acoustophoretic device includes an acoustic chamber, an ultrasonic transducer, and a reflector.
Flodesign Sonics, Inc.

Thereapeutic ultrasonic transducer

A therapeutic ultrasonic transducer including: a transducer body that has, in the stated order along the longitudinal axis, a first metal body, a laminated body in which a plurality of piezoelectric elements are laminated in the longitudinal-axis direction such that their directions of polarization are set in opposite directions in an alternating manner, and a second metal body, and that is formed by integrally fastening the metal bodies and the laminated body with a bolt; and a heat-radiation means that is connected at a position, on the transducer body, serving as a node of an ultrasonic vibration, or in the vicinity of that position.. .
Olympus Corporation

Micro-electromechanical sound transducer with sound energy-reflecting interlayer

A mems sound transducer for at least one of generating and detecting sound waves in air in an audible wavelength spectrum includes a carrier substrate, a cavity defined in the carrier substrate, the cavity defining at least one opening, and a multilayered piezoelectric membrane structure spanning over the opening of the cavity and having an edge area connected with the carrier substrate so that with respect to the carrier substrate the membrane structure is capable of vibrating to at least one of generate and/or and detect sound energy, wherein the membrane structure has in cross-section at least in some areas a first piezo layer spaced from a second piezo layer. An interlayer is arranged in an area between the first and second piezo layers, the interlayer being made of at least one of silicon oxide, silicon nitride and polysilicon, the interlayer being configured so that sound energy can be reflected in the direction of at least one interface of the membrane structure adjacent to the air..
Usound Gmbh

Elastic wave filter device

A saw filter device defines a filter including a high acoustic velocity member, a low acoustic velocity film, a piezoelectric film, and an idt electrode are stacked in this order. A comb capacitive electrode electrically coupled to the filter is provided on the piezoelectric film.
Murata Manufacturing Co., Ltd.

Piezoelectric actuator, motor, robot, and driving piezoelectric actuator

The invention relates to a piezoelectric actuator including: a first piezoelectric vibrator including a first diaphragm and first piezoelectric elements that are provided on the first diaphragm and include a first electrode, a second electrode, and a piezoelectric material layer held by the first electrode and the second electrode; a second piezoelectric vibrator including a second diaphragm and second piezoelectric elements that are provided on the second diaphragm and include a first electrode, a second electrode, and a piezoelectric material layer held by the first electrode and the second electrode; and an inductor. The layout of the first piezoelectric vibrator in the first diaphragm is the same as the layout of the second piezoelectric vibrator in the second diaphragm.
Seiko Epson Corporation

Vibration wave motor and driver utilizing the vibration wave motor

The dimension in a moving direction of a vibration wave motor is shortened without impairing the thrust force, and the size of a driver is reduced. The vibration wave motor includes a vibrating plate having a substantially rectangular outline, a piezoelectric element bonded to the vibrating plate and configured to vibrate, and a protrusion provided to the vibrating plate or the piezoelectric element.
Canon Kabushiki Kaisha

Transistor using piezoresistor as channel, and electronic circuit

A transistor includes: a piezoresistor through which carriers conduct; a source that injects the carriers into the piezoresistor; a drain that receives the carriers from the piezoresistor; a piezoelectric material that is located so as to surround the piezoresistor and applies a pressure to the piezoresistor; and a gate that applies a voltage to the piezoelectric material so that the piezoelectric material applies a pressure to the piezoresistor.. .
Japan Science And Technology Agency

Piezoelectric device and base

A piezoelectric device includes a crystal element, excitation electrodes, extraction electrodes, a base, and first and second wiring electrodes on the base and connected to the extraction electrodes. The crystal element is connectedly secured to the first wiring electrode with conductive adhesive at an end part at a side of the one side on one surface of the crystal element.
Nihon Dempa Kogyo Co., Ltd.

Bonding device

[solution] the bonding device is provided with a vibration driving portion (7), the vibration driving portion (7) including a plurality of piezoelectric elements (10) that are expanded and contracted along an axial direction of a bonding arm (3) respectively with one end thereof fixed to a leading end of the bonding arm (3), a plurality of capillary holding portions (15) that are in contact respectively with a circumferential face of a capillary (20) at a base end side thereof as being fixed correspondingly to the other end of the piezoelectric elements (10), and a pressing-holding portion (21) that sandwiches the capillary (20) as pressing the capillary (20) to the capillary holding portions (15) with at least one end side fixed to the bonding arm (3) and the other end side being in contact with the circumferential face of the capillary (20) at the base end side thereof on a side opposite to the capillary holding portions (15). Here, functional operation of amplitude, phase, frequency, or waveform is performed on drive voltage waveform to the respective piezoelectric elements..

Correction of diffraction effects in an ultrasonic sensor

Embodiments of correcting diffraction effects in an ultrasonic sensor are disclosed. In one embodiment, an ultrasonic sensor may include an ultrasonic transmitter configured to transmit an ultrasonic wave, a piezoelectric receiver layer configured to receive a reflected wave of the ultrasonic wave, where the reflected wave comprises a plurality of images of a fingerprint having a plurality of phases in a time sequence, and a platen layer configured to protect the ultrasonic transmitter and the piezoelectric receiver layer.
Qualcomm Incorporated

Piezoelectric accelerometer

At least some of the example embodiments are methods including measuring motion of a body by deflecting a first cantilever portion of a sensing element, and deflecting a second cantilever portion of a sensing element, the second cantilever element of the sensing element disposed opposite the first cantilever element. A first voltage having a first polarity is created across electrical leads responsive to the deflecting of the cantilever portions opposite the direction of the first acceleration of the body.
Pgs Geophysical As

Mn and nb co-doped pzt-based piezoelectric film

A mn and nb co-doped pzt-based piezoelectric film formed of mn and nb co-doped composite metal oxides is provided, in which a metal atom ratio (pb:mn:nb:zr:ti) in the film satisfies (0.98 to 1.12):(0.002 to 0.056):(0.002 to 0.056):(0.40 to 0.60):(0.40 to 0.60), a rate of mn is from 0.20 to 0.80 when the total of metal atom rates of mn and nb is 1, a rate of zr is from 0.40 to 0.60 when the total of metal atom rates of zr and ti is 1, and the total rate of zr and ti is from 0.9300 to 0.9902 when the total of metal atom rates of mn, nb, zr, and ti is 1.. .
Mitsubishi Materials Corporation

Piezoelectric device, liquid ejection head, and manufacturing piezoelectric device

A piezoelectric device includes a first substrate having an empty chamber, a diaphragm defining a surface of the empty chamber, a piezoelectric element formed by stacking a first electrode layer, a piezoelectric layer, and a second electrode layer in sequence from the diaphragm side, the piezoelectric element provided on the side of the diaphragm opposite to the empty chamber, and a second substrate provided on the side of the first substrate opposite to the diaphragm. The thickness of at least a part of the first substrate in an opening peripheral area of the empty chamber is thicker than the thickness in an area outside the opening peripheral area..
Seiko Epson Corporation

Piezoelectric device, liquid ejection head, and liquid ejection apparatus

An empty chamber component includes a pressure chamber formation substrate where a pressure chamber as an empty chamber is defined and a communication substrate bonded to the pressure chamber formation substrate. A piezoelectric element is provided on one side of the pressure chamber formation substrate.
Seiko Epson Corporation

Piezoelectric substrate, assembly, liquid discharge head, and recording device, each using piezoelectric substrate

The present invention aims at providing a piezoelectric substrate that is less susceptible to the influence of adhesive after being subjected to connection, as well as an assembly, a liquid discharge head, and a recording device, each of which uses the piezoelectric substrate. The piezoelectric substrate of the present invention is a flat plate shaped piezoelectric substrate including a piezoelectric ceramic layer, a plurality of first electrodes, a second electrode, and a third electrode.
Kyocera Corporation

Liquid discharge device and head unit

A liquid discharge device includes a modulation circuit that generates a modulation signal obtained by pulse-modulating a source signal by self oscillation, a transistor pair which includes a high side transistor and a low side transistor and which generates an amplified modulation signal by amplifying the modulation signal, a demodulator which includes an inductor and a capacitor and which generates a drive signal by smoothing the amplified modulation signal, an piezoelectric element that is displaced when the drive signal is applied, a cavity inside which a liquid droplet is filled and whose internal volume is changed by the displacement of the piezoelectric element, and a nozzle provided to discharge liquid inside the cavity according to the change of the internal volume of the cavity. A distance between the high side transistor and the capacitor is longer than a distance between the inductor and the capacitor..
Seiko Epson Corporation

Liquid discharge apparatus and controlling the same

A liquid discharge apparatus includes a filter configured to filter liquid to be discharged from a nozzle, a vibration detection mechanism configured to detect vibration of ink in an ink flow path generated by the driving of a piezoelectric element as an actuator; and a calculation circuit configured to obtain a detection value obtained by the vibration detection mechanism and perform calculation by using the detection value, wherein the vibration detection mechanism detects vibration of n (1<n≦m) nozzles out of m nozzles included in the recording head, and the calculation circuit determines a state of the filter on the basis of a result of the calculation performed by using the detection value obtained by the vibration detection mechanism.. .
Seiko Epson Corporation

Piezoelectric drive device, robot, and driving piezoelectric drive device

A piezoelectric drive device includes a vibrating body, a support portion formed integrally with the vibrating body, and a piezoelectric element formed of a first electrode film, a piezoelectric body film, and a second electrode film on at least one surface of the vibrating body.. .
Seiko Epson Corporation

Elastic wave device

An elastic wave device includes a piezoelectric substrate, first and second idt electrodes disposed on a first main surface, and bumps each connected to one of the first and second idt electrodes. First and second side portions extend in a direction perpendicular or substantially perpendicular to the polarization axis direction and to a direction normal to the piezoelectric substrate.
Murata Manufacturing Co., Ltd.

Surface acoustic wave filter

A longitudinally coupled resonator type surface acoustic wave filter includes a high-acoustic-velocity member, a low-acoustic-velocity film provided on the high-acoustic-velocity member, a piezoelectric film provided on the low-acoustic-velocity film, a plurality of interdigital transducers provided on the piezoelectric film and along a propagation direction of a surface acoustic wave and each including a plurality of electrode fingers, and reflectors arranged such that the interdigital transducers are interposed therebetween from both sides in the propagation direction of the surface acoustic wave. An electrode finger pitch is uniform or substantially uniform in each of the interdigital transducers.
Murata Manufacturing Co., Ltd.

Elastic wave device

An elastic wave device includes a piezoelectric substrate, first and second idt electrodes on a first main surface, and electrode lands each connected to one of the first and second idt electrodes. First and second side portions extend in a direction perpendicular or substantially perpendicular to a polarization axis direction and to a direction normal to the piezoelectric substrate.
Murata Manufacturing Co., Ltd.

Piezoelectric generator, its operation and its application in production, storage and transmission of electric energy

An apparatus comprises a piezoelectric element and a mechanical energy storage unit. The mechanical energy storage unit can be configured to receive a force and store the force as stored mechanical energy.

Polymeric piezoelectric material, and process for producing the same

Provided is a process for producing a polymeric piezoelectric material including a first step of heating a sheet in an amorphous state containing the helical chiral polymer to obtain a pre-crystallized sheet, and a second step of stretching the pre-crystallized sheet in biaxial directions, wherein the polymeric piezoelectric material includes a helical chiral polymer having a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, wherein a crystallinity of the material measured by a dsc method is from 20% to 80%, and a product of a standardized molecular orientation morc measured by a microwave transmission type molecular orientation meter based on a reference thickness of 50 μm and the crystallinity is from 25 to 250.. .
Mitsui Chemicals, Inc.

Piezoelectric composition, methods and applications thereof

The present disclosure relates to piezoelectric compositions of formula i comprising lead zirconate—lead titanate solid solution. The disclosure further relates to a method of obtaining said composition, method of preparing/fabricating piezoelectric component(s) and piezoelectric component(s)/article(s) obtained thereof.
Centre For Materials For Electronics Technology

Piezoelectric/electrostrictive actuator

A piezoelectric/electrostrictive (“pe”) actuator includes a pe element including a laminated object having a pe layer and a pair of electrodes arranged respectively on both sides of the pe layer, and having an operating part corresponding to the portion in which the pe layer is sandwiched between the pair of electrodes and a non-operating part corresponding to the portion in which the pe layer is not sandwiched between the pair of electrodes, and a moisture-proof film covering at least the vicinity of a boundary between the operating part and the non-operating part, consisting of a liquid with a saturated moisture content at 25 degree celsius of 300 ppm or less and a withstand voltage at the saturated moisture content of not less than 6 kv/mm. The liquid contains hydrocarbon system organic compound having a main backbone of carbon-carbon bond and consisting only of carbon and hydrogen..
Ngk Insulators, Ltd.

Acoustic wave element, duplexer and communication device

An elastic wave element has a piezoelectric substrate; an excitation electrode which is located on an upper surface of the piezoelectric substrate and generates an acoustic wave, and two reflectors which are located on the upper surface of the piezoelectric substrate and sandwich the excitation electrode in the propagation direction of the acoustic wave. The excitation electrode has a main region located between the two end parts of the propagation direction and outer regions located on two sides of the main region.
Kyocera Corporation



Piezoelectric topics:
  • Piezoelectric
  • Piezoresistive Material
  • Wave Device
  • Acoustic Wave
  • Electronic Device
  • Attenuation
  • Control Unit


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