CN107851711A - Piezoelectric device - Google Patents
Piezoelectric device Download PDFInfo
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- CN107851711A CN107851711A CN201680047959.8A CN201680047959A CN107851711A CN 107851711 A CN107851711 A CN 107851711A CN 201680047959 A CN201680047959 A CN 201680047959A CN 107851711 A CN107851711 A CN 107851711A
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- active region
- piezoelectric device
- longitudinal axis
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
- H10N30/508—Piezoelectric or electrostrictive devices having a stacked or multilayer structure adapted for alleviating internal stress, e.g. cracking control layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
Abstract
The present invention relates to a kind of piezoelectric device（10）, the piezoelectric device is configured to by piezoceramic material layer（12）And electrode layer（14）The heap of composition（18）, wherein the heap（18）Along the longitudinal axis（16）With at least two first active regions（36）, be disposed with first active region has first layer thickness respectively（D1）At least two piezoceramic material layers（12）, and wherein described heap（18）With at least two second active regions（38）, be disposed with second active region at least has second layer thickness respectively（D2）At least two piezoceramic material layers（12）.Second layer thickness（D2）Along the longitudinal axis（16）More than first layer thickness（D1）.
Description
Technical field
The present invention relates to a kind of piezoelectric device, the piezoelectric device is used for example as performing for the so-called piezoelectricity in ejector system
Device, the ejector system are used to inject fuel into the combustion chamber of internal combustion engine.
Background technology
Such piezoelectric device generally includes multiple piezoceramic material layers.For forming the so-called piezoelectricity of material layer pottery
Porcelain is following material, and the material is expanded when applying voltage due to piezo-electric effect.This piezoelectric ceramics forms mentioned immediately above
The basis of the piezo actuator arrived, the piezo actuator realize several microns of motion when applying voltage by longitudinal dilatation
Distance.Piezoelectric ceramics has electric dipole moment, and the electric dipole moment has preferential side within the magnetic domain to fix limit mutually respectively
To.Under the ground state not being polarized of piezoelectric ceramics, the privileged direction of each magnetic domain is irregular so that direction is not present outside
The electric polarization macroscopically of piezoelectric ceramics.
In order that the piezoelectric effect of piezo actuator can use, piezoelectric ceramics is polarized by the orientation of electric dipole moment, according to
This electric dipole moment in all magnetic domains is without departing from by the previously given privileged direction of polaxis or only small deviateing
Pass through the previously given privileged direction of polaxis.
Each above-mentioned piezoceramic material layer is mostly in both sides equipped with metal electrode layer.If applied to these electrode layers
Making alive so that these electrode layers actively conduct voltage, then piezoceramic material layer is made a response with distortion of lattice, described
Distortion of lattice causes the length expansion that can be used illustrated above.But, because the length expansion very little, such as
Piezoelectric device in the form of the piezo actuator in ejector system has multiple single piezoceramic material layers and electrode layer,
The piezoceramic material layer and electrode layer replace stackedly to arrange in heap along the longitudinal axis.
Fig. 5 to Fig. 7 shows this from piezoelectric device 10 known in the art, and it has multiple piezoceramic material layers
12 and multiple electrodes layer 14, the piezoceramic material layer 12 and electrode layer 14 alternately stackedly stack in heaps along the longitudinal axis 16
18。
As especially visible in figure 6, always alternately only guided until heap along the continuous electrode layer 14 of the longitudinal axis 16
18 side surface 20.In addition it is visible：The body arranged between them of the top section 22 and base section 24 of heap 18 and heap 18
Product part 26, which is compared, does not have electrode layer 14.
Thus, in top section 22 and institute is formed in the marginal zone 28 of the side of heap 18 and respectively in base section 24
The piezoelectricity inactive region of meaning, the piezoelectricity inactive region is when applying voltage（As illustrated in Figure 7）In its length
The piezoceramic material layer 12 in so-called active region must be different from by being showed in terms of expansion（It is shown in broken lines in figure 6）.
Due to the active region of piezoelectric device and the different length expansions of inactive region, do not expected in piezoelectric device
Mechanical stress.
In addition, the requirement increased to the discharge in internal combustion engine and consumption causes to injecting fuel into combustion chamber
Higher requirement.For example, higher fuel pressure and multi-injection becomes necessary, the multi-injection is also required to spraying simultaneously
The higher endurance life of piezoelectric device in device device.
Due to the described mechanical stress in piezoelectric device, there may be harmful crackle within piezoelectric device,
This significantly reduces the service life of piezoelectric device.
Up to the present, in order to solve the problem, that is to say, that reduce mechanical stress, known two kinds of plans as much as possible
Slightly.
On the one hand, can be by piezoceramic material layer in electrode by appropriate material selection and corresponding procedure parameter
Adhesion strength on layer is set to small so that mitigates mechanical stress by the crackle limited, the crackle is preferably being pressed
Electroceramics material layer and close to electrode layer between extend.
On the other hand, appropriate material selection and corresponding procedure parameter and piezoceramic material layer and electrode layer are passed through
The heap order of determination in piezoelectric device, can introduce the safe floor to lighten the load at regular intervals.
Scheme known to two kinds all pursues the target for making formed crackle targetedly and propagating with having restriction.So
And the formation for fundamentally reducing crackle can be desirable.
The content of the invention
The task of the present invention is to propose a kind of piezoelectric device, wherein considerably reducing the distribution of crackle.
The task solves using the piezoelectric device of the feature with claim 1.
The favourable design of the present invention is the theme of dependent claims.
Piezoelectric device have multiple piezoceramic material layers and it is multiple enliven electrode layer, wherein the piezoceramic material layer
With it is described enliven electrode layer in order to form heap and along the longitudinal axis it is alternately stacked stackably arrange.Along the longitudinal axis, heap has：Extremely
Few two the first active regions, at least two piezoelectric ceramics respectively with first layer thickness are disposed with first active region
Material layer；And at least two second active regions, be disposed with second active region at least has second layer thickness respectively
At least two piezoceramic material layers, wherein second layer thickness is more than first layer thickness along the longitudinal axis.First active region and
Two active regions along the longitudinal axis it is alternately stacked stackably arrange.
Therefore, in the second active region, be introduced into piezoelectric device have a case that than this in the first active region it is bigger
Thickness degree piezoceramic material layer.In the case of piezoceramic material layer increasingly thickness in active region, applying electricity
Electric field during pressure is less than the electric field in the piezoceramic material layer with smaller thickness degree, as this is in the first active region
That situation.As a result, the mechanical stress in thicker piezoceramic material layer is again smaller than in relatively thin piezoceramic material
Mechanical stress in layer.In the case of compared with gadget stress, the crackle that may be destroyed may be significantly smaller in piezoelectric device
Propagate on ground.Thus, the endurance life of piezoelectric device, the second active region tool are significantly improved by introducing the second active region
There is the piezoceramic material layer for possessing second layer thickness, the second layer thickness is more than first layer thickness.
Now, if piezoelectric device is used as the piezoelectric pile in injector device, then piezoelectric pile can driving when with
Requirement adaptation new and that requirement is higher.The adaptation can not only be selected by appropriate material as up to the present
Select to realize, and especially can lighten the load area by being introduced in the volume fractiion of piezoelectric device to realize, its mode is
Corresponding piezoceramic material layer and electrode layer overlappingly stack.
Preferably, the piezoceramic material layer with first layer thickness is only disposed with the first active region.Therefore,
One active region substantially contributes to the resulting length expansion of piezoelectric device, because being arranged here in predetermined length
Have than this more electrode layer of situation in the second active region.Thus, obtained in the first active region than in the second active region
In significantly larger length expansion.
In favourable design, heap has top section and base section along the longitudinal axis and is arranged in top section
Volume fractiion between base section, wherein the second active region is arranged in volume fractiion, and wherein top section and bottom
Portion part is formed by the firstth area respectively.
The major function of second active region is to mitigate the load of mechanical stress, is being pressed to avoid or at least to greatly reduce
The propagation of crackle in electrical part.Therefore these second active regions are preferably arranged in it is meaningful in volume fractiion,
The probability that there crackle is formed improves.
Preferably, the first active region being arranged in volume fractiion has at least three piezoceramic material layers, the pressure
Electroceramics material layer has first layer thickness.
In order that the length expansion of piezoelectric device builds especially big, it is advantageous to which the first active region is not arranged only at pressure
In the top section and base section of electrical part, and it is arranged in volume fractiion.Here it is applicable：More piezoceramic material layers
Directly overlappingly it is isolated from each other to arrange, that is only by electrode layer, it is possible to realize the bigger length of piezoelectric device
Degree expansion.Hence it is advantageous to the first active region is also disposed in the volume fractiion of piezoelectric device and then in such case
There are down at least three piezoceramic material layers.
According to the size of piezoelectric device, desired length expansion and it is arranged in piezoelectric device other first active
The number in area, the first active region in the volume fractiion of heap have the piezoceramic material layer between three to two ten.
In favourable design, it is disposed with least one second active region in the second active region at least one
Piezoceramic material layer with third layer thickness, wherein third layer thickness are more than second layer thickness along the longitudinal axis.It is this to have
The piezoceramic material layer of third layer thickness helps that the also stronger of piezoelectric device is lightened the load and therefore contributed to
More strongly reduce the danger that crackle is formed.
Preferably, the piezoceramic material layer with third layer thickness along the longitudinal axis by least one with the second thickness
The piezoceramic material layer of degree and the first active region are arranged at interval.Therefore, from the thin thickness of piezoceramic material layer
Degree is slowly transitioned into the thickness degree of thickness.This way it is possible to avoid unexpected transition, the unexpected transition has following danger for it
Danger, i.e., may construct mechanical stress in piezoelectric device.
Preferably, at least one safe floor is disposed with least one second active region in the second active region, it is described
Safe floor has the safety electrode being centrally disposed in along the longitudinal axis in safe floor.Thickness degree of the safe floor along the longitudinal axis is more than first
Thickness degree.Advantageously, the thickness degree of safe floor can correspond to second layer thickness and/or third layer thickness.However, safe floor
Thickness degree can also be thicker than second layer thickness or third layer thickness.
Safe floor is not electrode layer truly, but is metal level mostly, and the metal level is configured such that
They can not realize potential conduction.For example, these metal levels are targetedly mechanically weakened so that they for example can
It is enough to be operationally broken and therefore prevent the crackle formed in piezoelectric device.Because this crackle is by safety electricity
Pole, the safety electrode is not re-used as conduction, as this situation in other electrode layers.
Therefore, safe floor contributes to the further of piezoelectric device to lighten the load.
Preferably, safe floor is arranged in one of second active region at interval with first area.
Preferably, safe floor passes through at least one piezoelectric ceramics material with second and/or third layer thickness along the longitudinal axis
The bed of material and the first active region are arranged at interval.
Herein, it is preferable that between safe floor and the first active region for being arranged on safe floor of the longitudinal axis along heap with
And with the interval of the first active region being spaced apart along the longitudinal axis with safe floor under safe floor it is symmetrical.Therefore, can be with
Realize that the uniform of piezoelectric device lightens the load.
In favourable design, heap has the first side surface and the second side surface parallel to the longitudinal axis, and described first
Side surface and the second side surface are opposed, are alternately guided until the first side surface and straight wherein continuously enlivening electrode along the longitudinal axis
To the second side surface.Guiding is until the electrode that enlivens of the first side surface is spaced apart with the second side surface, and is guided until second
The electrode that enlivens of side surface is spaced apart with the first side surface.By this arrangement it is possible that being touched every an electrode, more
Exactly so that contact potential from close to electrode it is different, it is described close to electrode be loaded with another contact potential.Due to that
The different contacts of this adjacent electrode layer, it can produce for the current potential drop needed for the length expansion of piezoelectric device.
Preferably, it is applied with external contact respectively on the first side surface and on the second side surface, the outside connects
Touch and covers substantially whole length of the heap along the longitudinal axis.This means：Not only the first active region but also the second active region entirety
On belong to the overall active region of piezoelectric device.The top plate and bottom plate being additionally applied on piezoelectric device（The top
Plate and bottom plate generally without electrode layer and are used only for the insulation with other elements of piezo actuator）Formed so-called
Inactive region and greatly most without external contact.
The particularly preferred of piezoelectric device is lightened the load in order to provide, safety electrode guiding until the first side surface simultaneously
And guiding is until the second side surface.
Brief description of the drawings
The favourable design of the present invention is then illustrated in detail according to accompanying drawing.Wherein：
Fig. 1 shows the profilograph of the piezoelectric device according to first embodiment；
Fig. 2 shows the profilograph of the piezoelectric device according to second embodiment；
Fig. 3 shows the profilograph of the piezoelectric device according to the 3rd embodiment；
Fig. 4 shows the profilograph of the piezoelectric device according to the 4th embodiment；
Fig. 5 shows the profilograph of the piezoelectric device according to prior art；
Fig. 6 shows the profilograph of the piezoelectric device according to prior art；And
Fig. 7 shows the profilograph of the piezoelectric device according to prior art.
Embodiment
Fig. 1 shows the profilograph of the piezoelectric device 10 according to first embodiment.Piezoelectric device 10 has multiple pressures
Electroceramics material layer 12 and multiple electrodes layer 14, the piezoceramic material layer 12 and electrode layer 14 are alternately stacked along the longitudinal axis 16
Ground stacks, and therefore forms heap 18.Heap 18 has the first side surface 30 and the second side surface 32, institute parallel to the ground of the longitudinal axis 16
It is opposed to state the first side surface 30 and the second side surface 32.Alternately guided along the continuous electrode layer 14 of the longitudinal axis until the first side table
Face 30 and guiding are until the second side surface 32.On side opposed respectively, between the electrode layer and corresponding side surface 30,32
Separatedly arrange.On side surface 30,32, heap 18 has external contact 34 respectively, and difference can be given by the external contact
The on-load voltage of electrode layer 14 of contact.External contact is on side surface 30,32 substantially along the longitudinal axis 16 in piezoelectric device 10
Extend in whole length.Therefore, figure 1 illustrates heap 18 be integrally formed the active region of piezo actuator.
Heap 18 is divided into multiple active regions along the longitudinal axis 16, that is, is divided into the first active region 36 and the second active region 38, the work
Jump area along the longitudinal axis 16 it is alternately stacked stackably arrange.In the first active region 36, piezoceramic material layer 12 all has
There is first layer thickness D1.In the second active region 38, piezoceramic material layer 12 has second layer thickness D2 respectively, wherein second
Thickness degree D2 is more than first layer thickness D1.
Heap 18 is with multiple first active regions 36 and also with multiple second active regions 38.Here, the first active region 36
On the one hand formed heap 18 top section 22 and base section 24, but the first active region also be disposed on heap 18 be arranged in top
In volume fractiion 26 between part 22 and base section 24.And the second active region 38 is only located in volume fractiion 26.
Due to the bigger second layer thickness D2 being present in the second active region 38 in piezoceramic material layer 12, applying
The electric field of there is less than the electric field in the piezoceramic material layer 12 in the first active region 36 during making alive.Thus shape there
Into the mechanical stress than may be significantly smaller in the first active region 36, and the crackle that may be destroyed passes in which can may be significantly smaller
Broadcast.Therefore, the second active region 38 works for piezoelectric device 10 basically as area is lightened the load, and good length is swollen
Swollen function is substantially assigned to the first active region 36.In order to realize the especially good length expansion of piezoelectric device 10, cloth
The first active region 36 put in volume fractiion 26 has five piezoceramic material layers 12 respectively, and is counted as the area that lightens the load
The second active region 38 only there are two piezoceramic material layers 12 respectively.
Fig. 2 shows the profilograph of the piezoelectric device 10 according to second embodiment.With the difference of first embodiment
It is：Following piezoceramic material layer 12 is disposed with the second active region 38, the piezoceramic material layer has third layer
Thickness D3, the third layer thickness are more than second layer thickness D2 along the longitudinal axis 16.Thus, lightening the load in piezoelectric device 10
Effect is also more reinforced, because also thicker piezoceramic material layer 12 in piezoelectric device 10 be present, and therefore may be used also
More strongly to suppress the propagation of undesirable crackle.In order to avoid due to the piezoelectric ceramics material with visibly different thickness degree
Stress caused by the different expansions of the bed of material 12, the piezoceramic material layer 12 with third layer thickness D3 pass through at least one respectively
The individual piezoceramic material layer 12 with second layer thickness D2 is spaced apart with the first active region 36.
Fig. 3 shows the profilograph of the piezoelectric device 10 according to the 3rd embodiment.With the difference of first embodiment
It is：In addition to the piezoceramic material layer 12 with second layer thickness D2, peace is respectively disposed with the second active region 38
Holostrome 40, the safe floor have safety electrode 42.Here, safety electrode 42 extends to heap 18 from the first side surface 30 of heap 18
The second side surface 32.Here, safety electrode 42 is respectively configured to cause in the case of the mechanical stress of piezoelectric device 10
Targetedly cracked in the safety electrode, the crackle then stops in safety electrode 42 and therefore no longer
Continuation is propagated in piezoelectric device 10.
Seen along the longitudinal axis 16 of heap 18, safety electrode 42 is centrally disposed in safe floor 40, and the thickness of safe floor 40
Degree is more than the first layer thickness D1 in the first active region 36.Therefore, safe floor 40 is similarly formed the area that lightens the load, in the mitigation
In loading zone, on the one hand because the thickness degree of thickness can generally reduce the appearance of mechanical stress, and on the other hand due to safety
The presence of electrode 42 and the crackle still formed can be stopped.Safe floor 40 is arranged in the second active region 38 so that the peace
Quan Xingyu respectively arrange at interval above and below by the first active region 36 then, more specifically by phase
The piezoceramic material layer 12 with second layer thickness D2 is respectively disposed between the first active region 36 and safe floor 40 answered
With the first active region 36 then is arranged at interval above and below respectively.
Heap 18 figure 4 illustrates the 4th embodiment in, can additionally in the active region of safe floor 40 and first
The piezoceramic material layer 12 with third layer thickness D3 is there also is provided between 36, is lived therefore more continuously to build from first
Jump area 36 arrives the transition of safe floor 40.According to Fig. 3 and Fig. 4 piezoelectric ceramics with second layer thickness D2 or third layer thickness D3
Material layer 12 is arranged in the side of safe floor 40 respectively along the longitudinal axis 16 so that safe floor 40 and superincumbent first active region 36 and
It is symmetrically spaced out in the first following active region 36.
Fig. 5 to Fig. 7 shows the profilograph of the piezoelectric device 10 according to prior art, before the piezoelectric device
It is described by.
The arrangement and number of second active region 38 can be adapted to according to the desired requirement to piezoelectric device 10.It is identical
Situation be applied to piezoceramic material layer 12 with second layer thickness D2 and/or with third layer thickness D3 and enlivened second
Arrangement within area 38.These piezoceramic material layers can also be provided with or without according to demand.Equally, alternatively,
Can be provided with or without safe floor 40 within the second active region 38, and safe floor 40 can as requested with it is adjacent
First active region 36 further or is less spaced apart far.
On the whole, the mechanical stress in the piezoceramic material layer 12 with second layer thickness D2 or third layer thickness D3
Reduce compared to the piezoceramic material layer 12 with first layer thickness D1 being arranged in the first active region 36.It is thereby possible to
The crackle destroyed is generally less propagated in piezoelectric device.This causes the endurance life of piezoelectric device 10 substantially to be changed
It is kind.
Claims (10)
- A kind of 1. piezoelectric device（10）, the piezoelectric device has multiple piezoceramic material layers（12）Electrode layer is enlivened with multiple （14）, wherein the piezoceramic material layer（12）Electrode layer is enlivened with described（14）In order to form heap（18）And along the longitudinal axis （16）Stackably arrange alternately stackedly,Wherein described heap（18）Along the longitudinal axis（16）Have：At least two first active regions（36）, in first active region Be disposed with has first layer thickness respectively（D1）At least two piezoceramic material layers（12）；And at least two second is active Area（38）, be disposed with second active region at least has second layer thickness respectively（D2）At least two piezoelectric ceramics materials The bed of material（12）, wherein the second layer thickness（D2）Along the longitudinal axis（16）More than the first layer thickness（D1）,Wherein described first active region（36）With second active region（38）Along the longitudinal axis（16）Stackably come alternately stackedly Arrangement.
- 2. piezoelectric device according to claim 1（10）,Characterized in that, in first active region（36）In be only disposed with first layer thickness（D1）Piezoelectric ceramics material The bed of material（12）.
- 3. piezoelectric device according to claim 1 or 2（10）,Characterized in that, the heap（18）Along the longitudinal axis（16）With top section（22）And base section（24）And it is arranged in The top section（22）With the base section（24）Between volume fractiion（26）, wherein second active region（38）Cloth Put in the volume fractiion（26）In, and wherein described top section（22）With the base section（24）Respectively by described One active region（36）Formed.
- 4. piezoelectric device according to claim 3（10）,Characterized in that, it is arranged in the volume fractiion（26）In the first active region（36）With at least three piezoelectric ceramics materials The bed of material（12）, the piezoceramic material layer has first layer thickness（D1）.
- 5. the piezoelectric device according to one of Claims 1-4（10）,Characterized in that, in second active region（38）In at least one second active region in be disposed with and at least one have Third layer thickness（D3）Piezoceramic material layer（12）, wherein the third layer thickness（D3）Along the longitudinal axis（16）More than described Second layer thickness（D2）.
- 6. piezoelectric device according to claim 5（10）,Characterized in that, there is the third layer thickness（D3）Piezoceramic material layer（12）Along the longitudinal axis（16）By at least One has the second layer thickness（D2）Piezoceramic material layer（12）With first active region（36）Come at interval Arrangement.
- 7. the piezoelectric device according to one of claim 1 to 6（10）,Characterized in that, in second active region（38）In at least one second active region in be disposed with least one safety Layer（40）, the safe floor has along the longitudinal axis（16）It is centrally disposed in the safe floor（40）In safety electrode（42）, its Described in safe floor（40）Thickness degree along the longitudinal axis（16）More than the first layer thickness（D1）.
- 8. piezoelectric device according to claim 7（10）,Characterized in that, the safe floor（40）Along the longitudinal axis（16）By with the second layer thickness（D2）It is and/or described Third layer thickness（D3）At least one piezoceramic material layer（12）With first active region（36）Arrange at interval.
- 9. the piezoelectric device according to one of claim 1 to 8（10）,Characterized in that, the heap（18）Parallel to the longitudinal axis（16）Ground has the first side surface（30）With the second side surface（32）, First side surface and the second side surface are opposed, wherein along the longitudinal axis（16）Continuously enliven electrode layer（14）Alternately guide Until first side surface（30）With guiding until second side surface（32）, wherein guiding is until first side surface （30）Enliven electrode layer（14）With second side surface（32）It is spaced apart, and wherein guiding is until second side surface （32）Enliven electrode layer（14）With first side surface（30）It is spaced apart, wherein preferably, in first side surface （30）Above and in second side surface（32）It is upper to be applied with external contact respectively（34）, the external contact substantially covers The heap（18）Along the longitudinal axis（16）Whole length.
- 10. according to claim 9 and the piezoelectric device according to one of claim 7 or 8（10）,Characterized in that, the safety electrode（42）Guiding is until first side surface（30）With guiding until second side Surface（32）.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015215529.3 | 2015-08-14 | ||
| DE102015215529.3A DE102015215529A1 (en) | 2015-08-14 | 2015-08-14 | Piezoelectric component |
| PCT/EP2016/063857 WO2017028985A1 (en) | 2015-08-14 | 2016-06-16 | Piezoelectric component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107851711A true CN107851711A (en) | 2018-03-27 |
Family
ID=56132945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680047959.8A Pending CN107851711A (en) | 2015-08-14 | 2016-06-16 | Piezoelectric device |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3335252A1 (en) |
| JP (1) | JP2018525829A (en) |
| KR (1) | KR20180037018A (en) |
| CN (1) | CN107851711A (en) |
| DE (1) | DE102015215529A1 (en) |
| WO (1) | WO2017028985A1 (en) |
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|---|---|---|---|---|
| WO2008072768A1 (en) * | 2006-12-15 | 2008-06-19 | Kyocera Corporation | Laminated piezoelectric element, jetting device provided with the laminated piezoelectric element and fuel jetting system |
| WO2009101858A1 (en) * | 2008-02-12 | 2009-08-20 | Konica Minolta Opto, Inc. | Oscillatory-type drive device, and method for adjusting piezoelectric element and the oscillatory-type drive device |
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| DE10202574A1 (en) * | 2001-02-15 | 2002-09-12 | Ceramtec Ag | Piezoceramic multi-layer actuator with a transition area between the active area and the inactive head and foot areas |
| DE102006054701A1 (en) * | 2006-11-21 | 2008-05-29 | Robert Bosch Gmbh | Piezo actuator with stacked piezo elements |
| JP2011510505A (en) * | 2008-01-23 | 2011-03-31 | エプコス アクチエンゲゼルシャフト | Piezoelectric multilayer components |
| DE102010006587A1 (en) * | 2010-02-02 | 2011-08-04 | Epcos Ag, 81669 | Piezoelectric component |
| WO2014009303A1 (en) * | 2012-07-09 | 2014-01-16 | Continental Automotive Gmbh | Piezoelectric multilayer actuator and injection valve |
-
2015
- 2015-08-14 DE DE102015215529.3A patent/DE102015215529A1/en not_active Ceased
-
2016
- 2016-06-16 EP EP16729575.7A patent/EP3335252A1/en not_active Withdrawn
- 2016-06-16 WO PCT/EP2016/063857 patent/WO2017028985A1/en active Application Filing
- 2016-06-16 KR KR1020187006067A patent/KR20180037018A/en not_active Application Discontinuation
- 2016-06-16 CN CN201680047959.8A patent/CN107851711A/en active Pending
- 2016-06-16 JP JP2018507543A patent/JP2018525829A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008072768A1 (en) * | 2006-12-15 | 2008-06-19 | Kyocera Corporation | Laminated piezoelectric element, jetting device provided with the laminated piezoelectric element and fuel jetting system |
| WO2009101858A1 (en) * | 2008-02-12 | 2009-08-20 | Konica Minolta Opto, Inc. | Oscillatory-type drive device, and method for adjusting piezoelectric element and the oscillatory-type drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3335252A1 (en) | 2018-06-20 |
| KR20180037018A (en) | 2018-04-10 |
| JP2018525829A (en) | 2018-09-06 |
| WO2017028985A1 (en) | 2017-02-23 |
| DE102015215529A1 (en) | 2017-02-16 |
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