WO2012099233A1 - 積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置ならびに燃料噴射システム - Google Patents
積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置ならびに燃料噴射システム Download PDFInfo
- Publication number
- WO2012099233A1 WO2012099233A1 PCT/JP2012/051171 JP2012051171W WO2012099233A1 WO 2012099233 A1 WO2012099233 A1 WO 2012099233A1 JP 2012051171 W JP2012051171 W JP 2012051171W WO 2012099233 A1 WO2012099233 A1 WO 2012099233A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezoelectric element
- laminated
- inorganic coat
- internal electrode
- piezoelectric
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 62
- 239000007924 injection Substances 0.000 title claims abstract description 62
- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 239000002923 metal particle Substances 0.000 claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims description 36
- 239000012530 fluid Substances 0.000 claims description 28
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 19
- 229910052709 silver Inorganic materials 0.000 claims description 19
- 239000004332 silver Substances 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 7
- 239000011800 void material Substances 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 11
- 239000011248 coating agent Substances 0.000 abstract description 10
- 238000000576 coating method Methods 0.000 abstract description 10
- 230000002950 deficient Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 37
- 239000010410 layer Substances 0.000 description 35
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 22
- 229910021645 metal ion Inorganic materials 0.000 description 13
- 239000000843 powder Substances 0.000 description 13
- 239000011521 glass Substances 0.000 description 11
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 8
- 239000004014 plasticizer Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000013078 crystal Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 7
- SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 description 7
- 230000005684 electric field Effects 0.000 description 5
- 238000013508 migration Methods 0.000 description 5
- 230000005012 migration Effects 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 229910001252 Pd alloy Inorganic materials 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000007606 doctor blade method Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- -1 silver ions Chemical class 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
- H10N30/871—Single-layered electrodes of multilayer piezoelectric or electrostrictive devices, e.g. internal electrodes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- 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
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
- H10N30/883—Further insulation means against electrical, physical or chemical damage, e.g. protective coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
Definitions
- the present invention relates to a laminated piezoelectric element used as, for example, a piezoelectric driving element (piezoelectric actuator), a pressure sensor element, a piezoelectric circuit element, and the like, and a piezoelectric actuator, an injection device, and a fuel injection system including the same.
- a piezoelectric driving element piezoelectric actuator
- a pressure sensor element a piezoelectric sensor element
- a piezoelectric circuit element and the like
- a piezoelectric actuator an injection device, and a fuel injection system including the same.
- a laminated piezoelectric element basically includes a laminated body in which a piezoelectric layer and an internal electrode layer are laminated, and an external electrode joined to a side surface of the laminated body and electrically connected to the internal electrode layer. belongs to.
- the conventional multilayer piezoelectric element has an exterior coat made of an organic material such as a silicone resin or an inorganic material such as glass in order to prevent a leakage current from occurring on the surface of the multilayer body and causing a change in displacement. It has been subjected.
- a multilayer piezoelectric element using a ceramic coat (ceramic coating layer) having particularly good heat resistance and moisture resistance as an inorganic material exterior coat (inorganic coat) is known (see Patent Document 1).
- the glass portion in the inorganic coat In the case of ceramics, there is a possibility that a defect region is generated in the grain boundary portion) and migration in which metal ions move through the defect region due to intrusion of moisture occurs to cause a leakage current to flow.
- the amount of displacement of the multilayer piezoelectric element may be reduced due to leakage current.
- An object of the present invention is to provide a piezoelectric element, a piezoelectric actuator including the piezoelectric element, an injection device, and a fuel injection system.
- the present invention provides a laminated body in which a piezoelectric layer, a positive electrode and an internal electrode as a negative electrode are laminated, and a side surface of the laminated body where both ends of the positive electrode and the negative electrode are exposed.
- the inorganic coat is characterized in that metal particles mainly containing the metal element contained in the internal electrode are dispersed and contained in the inorganic coat.
- the metal particles are preferably distributed unevenly on the surface side of the inorganic coat.
- a void is provided on the side surface of the laminate in the inorganic coat.
- the inorganic coat is preferably made of a piezoelectric material.
- the metal element contained in the internal electrode is silver, and the metal particles are silver particles.
- the piezoelectric actuator of the present invention is characterized in that, together with any one of the multilayer piezoelectric elements of the present invention, a case for accommodating the multilayer piezoelectric element therein is provided.
- An ejection device includes a container having an ejection hole and any one of the multilayer piezoelectric elements according to the present invention, and fluid stored in the container is driven from the ejection hole by driving the multilayer piezoelectric element. It is characterized by being discharged.
- the fuel injection system of the present invention includes a common rail that stores high-pressure fuel, the injection device of the present invention that injects the high-pressure fuel stored in the common rail, a pressure pump that supplies the high-pressure fuel to the common rail, and the injection And an injection control unit for supplying a drive signal to the apparatus.
- the displacement amount of the multilayer piezoelectric element does not vary for a long period of time, Can be driven stably.
- FIG. 3 is an example of a cross-sectional view taken along line AA shown in FIGS. 6 is another example of a cross-sectional view taken along line AA shown in FIGS. 6 is another example of a cross-sectional view taken along line AA shown in FIGS.
- FIG. 1 is a perspective view showing an example of an embodiment of a laminated piezoelectric element according to the present invention, which is an example in which inorganic coating is applied to two side surfaces.
- FIG. 2 is a perspective view showing another example of the embodiment of the multilayer piezoelectric element of the present invention, in which an inorganic coat is applied to all side surfaces.
- FIG. 3 is an example of a cross-sectional view taken along the line AA shown in FIGS. 4 and 5 are examples in which an inorganic coat having a two-layer structure is formed.
- the laminated piezoelectric element 1 of this example includes a laminated body 7 in which a piezoelectric layer 2 and an internal electrode 3 are laminated, and an internal electrode 3 and an electric electrode on a pair of side surfaces of the laminated body 7. On the other pair of side surfaces of the laminated body 7 in which both ends of both the positive internal electrode 310 and the negative internal electrode 320 appear are provided.
- An inorganic coat 5 is provided, and inside the inorganic coat 5, metal particles 51 mainly containing a metal element contained in the internal electrode 3 are dispersed and contained.
- the piezoelectric layers 2 and the internal electrodes 3 are alternately laminated, and the internal electrodes 3 are composed of positive internal electrodes 310 and negative internal electrodes 320 every other layer. They are formed alternately.
- the laminated body 7 is formed in a rectangular parallelepiped shape having a length of 0.5 to 10 mm, a width of 0.5 to 10 mm, and a height of 1 to 100 mm, for example.
- the piezoelectric layer 2 constituting the laminated body 7 is made of piezoelectric ceramics having piezoelectric characteristics, and for example, a perovskite oxide such as PbZrO 3 -PbTiO 3 (PZT: lead zirconate titanate) can be used.
- the thickness of the piezoelectric layer 2 is, for example, 3 ⁇ m to 250 ⁇ m.
- the internal electrodes 3 constituting the laminate 7 are alternately laminated with the piezoelectric layers 2 so as to sandwich the piezoelectric layers 2 from above and below, and a positive internal electrode 310 and a negative internal electrode 320 are arranged in the order of lamination. Thus, a driving voltage is applied to the piezoelectric layer 2 sandwiched between them.
- the internal electrode 3 (positive internal electrode 310, negative internal electrode 320) is made of a metal such as silver palladium (Ag—Pd), for example.
- the positive internal electrode 310 and the negative (or ground) internal electrode 320 are alternately led to a pair of opposing side surfaces of the stacked body 7 and joined to the side surfaces of the stacked body 7.
- the pair of external electrodes 6 are electrically connected.
- the thickness of the internal electrode 3 is, for example, 0.1 ⁇ m to 5 ⁇ m.
- the pair of external electrodes 6 are formed by applying and baking a paste made of silver and glass, for example, and are joined to the side surfaces of the laminated body 7 and alternately led to the opposite side surfaces of the laminated body 7. Each of the electrodes 3 is electrically connected.
- the thickness of the external electrode 6 is, for example, 1 to 500 ⁇ m.
- both the positive internal electrode 310 and the negative electrode (or ground electrode) internal electrode 320 are led out to another pair of opposing side surfaces of the laminate 7 shown in FIG. It appears.
- the inorganic coat 5 is applied to the other pair of opposing side surfaces of the laminate 7 where both ends of the positive internal electrode 310 and the negative internal electrode 320 appear.
- This side surface is a surface where the external electrode 6 is not formed.
- Examples of the material of the inorganic coat 5 include a piezoelectric material and alumina, but a piezoelectric material having a low Young's modulus is preferable. Since the inorganic coat 5 is formed of a piezoelectric material, the crystal can be distorted. Therefore, it is possible to follow the displacement of the laminate 7 and to prevent the inorganic coat 5 from peeling off. Further, since the inorganic coat 5 is displaced in the same direction as the adjacent piezoelectric layer 2 by a leakage electric field from the internal electrode 3 (an electric field generated in a region not sandwiched between the electrodes), the expansion and contraction of the multilayer body 7 is followed. It becomes possible.
- the piezoelectric layer 2 by using a piezoelectric material of the same type as the piezoelectric layer 2, for example, PbZrO 3 -PbTiO 3 (PZT: lead zirconate titanate), it is possible to suppress peeling of the inorganic coat 5 due to a difference in thermal expansion during baking and cooling. it can. In addition, it is possible to suppress deterioration in characteristics of the piezoelectric layer 2 due to diffusion of a trace component from the piezoelectric layer 2 to the inorganic coat 5 that occurs during baking.
- the inorganic coat 5 has a thickness of 1 to 500 ⁇ m, for example.
- metal particles 51 containing the metal element contained in the internal electrode 3 as a main component are dispersed and contained.
- the dispersion means that the average value of the distance between the metal particles 51 is larger than the average value of the particle diameter of the metal particles 51.
- the average value of the distance between the metal particles 51 is 0.1 to 100 ⁇ m. ing. This value is obtained by observing the cross section with an electron microscope such as a scanning electron microscope (SEM) or a metallographic microscope, measuring the number of particles included in an arbitrary line segment, and the distance between the particles, and summing the distances between the particles. It can be determined by dividing the distance by the number between particles.
- SEM scanning electron microscope
- the metal particles 51 mainly composed of the metal element contained in the internal electrode 3 are dispersed inside the inorganic coat 5, even if stress such as impact is applied to the inorganic coat 5 from the outside, the stress can be reduced.
- the effect of diffracting the propagation can suppress the development of cracks (reduce the generation of defect regions). Therefore, it is possible to suppress leakage current from flowing due to migration in which metal ions move through the defect region.
- the metal particles 51 contained in the inorganic coat 5 are preferably smaller in size than the ceramic particles constituting the inorganic coat 5 because the propagated stress can be easily diffracted.
- the particle size of the ceramic particles is 0.1 to 20 ⁇ m
- the particle size of the metal particles 51 is 0.05 to 2 ⁇ m
- the term “particle size” as used herein refers to the average particle size, and the cross section is observed with an electron microscope such as a scanning electron microscope (SEM) or a metallographic microscope. This is obtained by measuring the length of a line segment that crosses and dividing the total distance of the length of this line segment by the number of particles.
- metal ions in a solid are diffused by Fick's law.
- the metal ions move from the high-concentration internal electrode 3 and the piezoelectric layer 2 toward the low-density inorganic coat 5 while moving the ionized oxygen vacancies in the opposite direction to compensate for charges and move the crystal grain boundaries.
- the metal ions exchange electric charges to eliminate oxygen vacancies and aggregate into the metal particles 51. Therefore, the presence of metal ions at the crystal grain boundaries in the inorganic coat 5 can be suppressed, and even when moisture enters, the generation of leakage current can be suppressed, so that the displacement amount of the multilayer piezoelectric element 1 does not vary for a long time. Can be driven stably.
- the inorganic coat 5 is firmly bonded to the side surface of the laminate 7, and the inorganic coat 5 is peeled off or migration occurs due to moisture intrusion from the side surface. The occurrence of leak current can be suppressed.
- the coating layer is the inorganic coat 5, there is no problem even in use at a high temperature that cannot be withstood by the resin coating layer.
- the metal particles 51 may be those having a metal element contained in the internal electrode 3 as a main component.
- the metal element contained in the internal electrode 3 is copper
- the metal particles 51 are copper particles
- the metal particles 51 may be combined with silver particles.
- silver since silver is soft, it is effective in that it can absorb stress.
- silver since silver can exist more stably as a metal than an oxide in a temperature range near room temperature, silver ions are dispersed from the internal electrode 3 in advance by dispersing silver particles as metal particles 51 in the inorganic coat 5 in advance. Even if it diffuses in the coat 5, the silver ions do not precipitate as silver oxide in the inorganic coat 5, but are selectively aggregated and captured by the metal particles 51 by exchanging charges in the vicinity of the metal particles 51. This is preferable.
- the inorganic coat 5 is not limited to be applied only to the surface on which the external electrode 6 is not formed as shown in FIG. 1, but the surface on which the external electrode 6 is formed as shown in FIG. It may be attached to all sides including.
- FIG. 2 on the surface where the external electrode 6 is formed, one end of either the positive internal electrode 310 or the negative internal electrode 320 appears in the region where the external electrode 6 is formed and in the vicinity thereof. In other regions, both ends of the positive internal electrode 310 and the negative internal electrode 320 appear.
- Such a configuration is preferable because the metal ions moving from the internal electrode 3 can be controlled from all directions and are more difficult to peel off.
- the multilayer piezoelectric element 1 can be driven stably. be able to.
- the inorganic coat 5 may be provided on the entire other side surface of the laminate 7 where both ends of the positive electrode 310 and the negative electrode 320 appear, but the laminate 7 is stretched and contracted. From the viewpoint of facilitating, as shown in FIG. 1, it is sufficient that the other side surfaces are provided so as to cover at least the ends of both the positive internal electrode 310 and the negative internal electrode 320. That is, the inorganic coat 5 may not be provided in a region near the both ends of the laminate 7 where the end portions of the positive internal electrode 310 and the negative internal electrode 320 do not appear on the other side surfaces.
- the metal particles 51 contained in the inorganic coat 5 are preferably distributed unevenly on the surface side of the inorganic coat 5. Since the diffusion of the metal ions occurs toward the metal particles 51 in the inorganic coat 5, the movement direction of the metal ions can be surely made to be away from the electrodes of different poles.
- the fact that the metal particles 51 are unevenly distributed on the surface side of the inorganic coat 5 means that the cross section of the multilayer piezoelectric element 1 is observed with an electron microscope such as a scanning electron microscope (SEM) or a metal microscope, and the inorganic coat
- SEM scanning electron microscope
- the number of metal particles 51 included in a distance from the surface side of 5 to a third of the thickness and the number of metal particles included in another arbitrary region can be measured and compared.
- the inorganic coat 5 A and the metal particles 51 on the side surface of the laminate that do not contain the metal particles 51 can be set as the inorganic coat 5 of the two-layer structure of the inorganic coat 5B of the surface side containing this.
- the inorganic coat 5A on the side surface of the laminate is thinner than the distance between the internal electrodes 3 (between the positive internal electrode 310 and the negative internal electrode 320) because the diffusion distance is short.
- the degree of dispersion and the particle size of the metal particles 51 in the inorganic coat 5B on the surface side are the same as those in the example shown in FIG.
- the displacement amount of the multilayer piezoelectric element 1 is greatest at the end of the laminate 7 in the stacking direction, the stress is most applied to the end of the inorganic coat 5 in the stacking direction.
- a defect region occurs in the glass portion (in the case of ceramic, a grain boundary portion) in the inorganic coat 5 from the internal electrode 3 located at the end of the electrode, and the metal ions contained in the internal electrode 3 are different from each other through the defect region.
- the leakage current easily reaches the internal electrode 3. Therefore, as shown in FIG. 5, the metal particles contained in the inorganic coat 5 are preferably distributed unevenly at the end of the laminate 7 in the stacking direction.
- the inorganic coat 5 is preferably provided with a void on the side surface side of the laminate 7.
- the stress of the inorganic coat 5 in contact with the laminate 7 can be relaxed.
- cracks in the grain boundary of the first layer can be suppressed, so that the path of ions moving to different electrodes while passing through the gaps between the crystal grains can be suppressed.
- the void diameter is, for example, 0.05 to 2 ⁇ m, and the stress relaxation effect can be obtained by distributing it in the inorganic coat 5 between the internal electrodes 3 (between the positive internal electrode 310 and the negative internal electrode 320). Since it becomes higher and the cracks in the crystal grain boundaries can be suppressed, the path of ions moving to different electrodes while passing through the gaps between the crystal grains can be suppressed.
- the voids are distributed on the side surface side of the laminated body 7 of the inorganic coat 5 allows the cross section of the laminated piezoelectric element 1 to be observed with an electron microscope such as a scanning electron microscope (SEM) or a metal microscope,
- SEM scanning electron microscope
- a metal microscope In the inorganic coat 5, a large number of voids are present on the side surface of the laminate, and the number (ratio) of voids included in the distance from the laminate side surface of the inorganic coat 5 to one third of the thickness. And the number (ratio) of voids included in other arbitrary regions can be determined by comparison.
- an external lead member 9 as shown in FIG. 6 is connected and fixed to the external electrode 6 with a conductive connecting member such as solder or conductive adhesive, and a DC electric field of 0.1 to 3 kV / mm is applied from the external lead member 9.
- the whole piezoelectric piezoelectric element 1 can be polarized by polarizing the piezoelectric layer 2 constituting the multilayer body 7.
- This multilayer piezoelectric element 1 is configured such that an external electrode 6 and an external power source are connected via an external lead member 9 as shown in FIG.
- the layer 2 can be greatly displaced by the inverse piezoelectric effect.
- a piezoelectric ceramic green sheet to be the piezoelectric layer 2 is produced.
- a ceramic slurry is prepared by mixing a calcined powder of piezoelectric ceramic, a binder made of an organic polymer such as acrylic or butyral, and a plasticizer. Then, by using a tape molding method such as a doctor blade method or a calender roll method, a piezoelectric ceramic green sheet is produced using this ceramic slurry.
- any piezoelectric ceramic may be used.
- a perovskite oxide made of lead zirconate titanate (PZT: PbZrO 3 -PbTiO 3 ) can be used.
- the plasticizer dibutyl phthalate (DBP), dioctyl phthalate (DOP), or the like can be used.
- an internal electrode conductive paste to be the internal electrode 3 is prepared.
- a conductive paste for internal electrodes is prepared by adding and mixing a binder and a plasticizer to a metal powder of a silver-palladium alloy. In place of the silver-palladium alloy, silver powder and palladium powder may be mixed.
- the internal electrode conductive paste is applied on the piezoelectric ceramic green sheet in the pattern of the internal electrode layer 3 by, for example, a screen printing method.
- the laminated body obtained by firing is subjected to a grinding process on the side surface using a surface grinder or the like so as to have a predetermined shape.
- the laminated body 7 in which the piezoelectric layers 2 and the internal electrodes 3 are alternately laminated is manufactured.
- the inorganic coating paste prepared by adding metal particles mainly composed of metal elements contained in the internal electrode to the inorganic powder such as ceramic and glass, and mixing the binder and plasticizer is screen printed on the side of the laminate 7 Apply using a method such as dipping or baking, and bake at a temperature of 500-1200 ° C. At this time, the inorganic coating paste is not applied to the surface on which the external electrode 6 is formed, or is applied and baked after being baked.
- the ceramic powder contained in the inorganic coating paste is preferably a calcined powder of piezoelectric ceramic, and more preferably a ceramic powder having the same composition as the piezoelectric layer 2.
- the metal particles 51 are applied to the surface.
- a silver glass conductive paste containing silver as a main component and containing glass is printed on the side surface of the laminate 7 where the internal electrode 3 is derived in the pattern of the external electrode 6, and baked at 650 to 750 ° C. 6 is formed.
- the external lead member 9 is connected and fixed to the external electrode 6 with a conductive connecting member such as solder or conductive adhesive.
- a direct current electric field of 0.1 to 3 kV / mm is applied from the external lead members 9 connected to the pair of external electrodes 6 respectively, and the piezoelectric layer 2 constituting the multilayer body 7 is polarized, whereby the multilayer piezoelectric element 1 as a whole. Is polarized.
- the multilayer piezoelectric element 1 connects each external electrode 6 and an external power source via an external lead member 9 and applies a driving voltage to the piezoelectric layer 2, thereby causing each piezoelectric layer 2 to have an inverse piezoelectric effect. Can be greatly displaced. This makes it possible to use, for example, a piezoelectric actuator or to function as an automobile fuel injection valve that injects and supplies fuel to an engine.
- FIG. 6 is a schematic sectional view showing an example of the embodiment of the piezoelectric actuator of the present invention.
- the piezoelectric actuator 11 of this example is obtained by housing the multilayer piezoelectric element 1 in a case 13.
- the case 13 includes a case main body 15 whose upper end is closed and whose lower end is open, and a lid member 17 attached to the case main body 15 so as to close the opening of the case main body 15.
- the laminated piezoelectric element 1 is enclosed and accommodated in the case 13 together with, for example, an inert gas so that both end faces of the element 1 are brought into contact with the upper and lower inner walls of the case 13, respectively.
- the case body 15 and the lid member 17 are made of a metal material such as SUS304 or SUS316L.
- the case main body 15 is a cylindrical body whose upper end is closed and whose lower end is open, and has, for example, a bellows (bellows) shape so that it can expand and contract in the stacking direction of the stack 7.
- the lid member 17 is formed, for example, in a plate shape so as to close the opening of the case body 15.
- the lid member 17 is formed with two through holes into which the external lead member 9 can be inserted.
- the external lead member 9 is inserted into the through hole to electrically connect the external electrode 6 to the outside.
- the gap between the through holes is filled with soft glass or the like to fix the external lead member 9 and prevent the outside air from entering.
- the piezoelectric actuator 11 of this example can be stably driven for a long time.
- FIG. 7 is a schematic cross-sectional view showing an example of an embodiment of the injection device of the present invention.
- the multilayer piezoelectric element 1 of the above example is accommodated inside a storage container (container) 23 having an injection hole 21 at one end.
- a needle valve 25 capable of opening and closing the injection hole 21 is disposed in the storage container 23 in the storage container 23 .
- a fluid passage 27 is disposed in the injection hole 21 so that it can communicate with the movement of the needle valve 25.
- the fluid passage 27 is connected to an external fluid supply source, and fluid is always supplied to the fluid passage 27 at a high pressure. Therefore, when the needle valve 25 opens the injection hole 21, the fluid supplied to the fluid passage 27 is discharged from the injection hole 21 to the outside or an adjacent container, for example, a fuel chamber (not shown) of the internal combustion engine. It is configured.
- the upper end of the needle valve 25 has a large diameter, and is a piston 31 that can slide with a cylinder 29 formed in the storage container 23.
- the multilayer piezoelectric element 1 of the above-described example is stored in contact with the piston 31.
- the fluid passage 27 may be opened by applying a voltage to the multilayer piezoelectric element 1 and the fluid passage 27 may be closed by stopping the application of the voltage.
- the injection device 19 of this example includes a container 23 having an injection hole 21 and the multilayer piezoelectric element 1 of the above example, and the fluid filled in the container 23 is ejected by driving the multilayer piezoelectric element 1. It may be configured to discharge from the hole 21.
- the multilayer piezoelectric element 1 does not necessarily have to be inside the container 23, as long as the multilayer piezoelectric element 1 is configured to apply pressure for controlling the ejection of fluid to the inside of the container 23 by driving the multilayer piezoelectric element 1. Good.
- the fluid includes various liquids and gases such as a conductive paste in addition to fuel, ink, and the like.
- the injection device 19 of this example that employs the multilayer piezoelectric element 1 of the above example is used for an internal combustion engine, the fuel is accurately injected into the combustion chamber of the internal combustion engine such as an engine over a longer period than the conventional injection device. Can be made.
- FIG. 8 is a schematic view showing an example of an embodiment of the fuel injection system of the present invention.
- the fuel injection system 35 of this example includes a common rail 37 that stores high-pressure fuel as high-pressure fluid, and a plurality of injection devices 19 of the above-described examples that inject high-pressure fluid stored in the common rail 37.
- a pressure pump 39 for supplying a high-pressure fluid to the common rail 37 and an injection control unit 41 for supplying a drive signal to the injection device 19 are provided.
- the injection control unit 41 controls the amount and timing of high-pressure fluid injection based on external information or an external signal. For example, if the fuel injection system 35 of this example is used for fuel injection of the engine, the amount and timing of fuel injection can be controlled while sensing the condition in the combustion chamber of the engine with a sensor or the like.
- the pressure pump 39 serves to supply fluid fuel from the fuel tank 43 to the common rail 37 at a high pressure. For example, in the case of an engine fuel injection system 35, fluid fuel is fed into the common rail 37 at a high pressure of about 1000 to 2000 atmospheres (about 101 MPa to about 203 MPa), preferably about 1500 to 1700 atmospheres (about 152 MPa to about 172 MPa).
- the high-pressure fuel sent from the pressure pump 39 is stored and sent to the injection device 19 as appropriate.
- the injection device 19 injects a certain fluid from the injection hole 21 to the outside or an adjacent container as described above.
- the target for injecting and supplying fuel is an engine
- high-pressure fuel is injected in a mist form from the injection hole 21 into the combustion chamber of the engine.
- desired injection of high-pressure fuel can be stably performed over a long period of time.
- the external electrodes 6 in the multilayer piezoelectric element 1 are formed on the two opposite side surfaces of the multilayer body 7, but the two external electrodes 6 are formed on adjacent side surfaces of the multilayer body 7. Alternatively, they may be formed on the same side surface of the laminate 7.
- the cross-sectional shape in the direction orthogonal to the stacking direction of the stacked body 7 is not limited to the quadrangular shape that is an example of the above embodiment, but a polygonal shape such as a hexagonal shape or an octagonal shape, a circular shape, or a straight line and an arc. You may be the shape which combined.
- the multilayer piezoelectric element 1 of this example is used for, for example, a piezoelectric drive element (piezoelectric actuator), a pressure sensor element, a piezoelectric circuit element, and the like.
- the driving element include a fuel injection device for an automobile engine, a liquid injection device such as an inkjet, a precision positioning device such as an optical device, and a vibration prevention device.
- the sensor element include a combustion pressure sensor, a knock sensor, an acceleration sensor, a load sensor, an ultrasonic sensor, a pressure sensor, and a yaw rate sensor.
- Examples of the circuit element include a piezoelectric gyro, a piezoelectric switch, a piezoelectric transformer, and a piezoelectric breaker.
- a piezoelectric actuator provided with the multilayer piezoelectric element of the present invention was produced as follows. First, a ceramic slurry was prepared by mixing calcined powder of a piezoelectric ceramic mainly composed of lead zirconate titanate (PZT: PbZrO 3 —PbTiO 3 ) having an average particle size of 0.4 ⁇ m, a binder and a plasticizer. Using this ceramic slurry, a piezoelectric ceramic green sheet serving as a piezoelectric layer having a thickness of 100 ⁇ m was prepared by a doctor blade method.
- PZT lead zirconate titanate
- a binder was added to the silver-palladium alloy to produce an internal electrode conductive paste to be an internal electrode.
- the silver-palladium ratio at this time was 95% by mass of silver-5% by mass of palladium.
- a conductive paste for internal electrodes was printed on one side of the piezoelectric ceramic green sheet by a screen printing method.
- the obtained laminated body was ground and processed into a predetermined shape using a surface grinder.
- a paste for inorganic coating was prepared by adding a binder and a plasticizer to a calcined powder having the same composition as the piezoelectric ceramic described above and a metal powder mainly composed of a metal element contained in the internal electrode.
- a calcined powder of piezoelectric ceramics mainly composed of lead zirconate titanate (PZT: PbZrO 3 —PbTiO 3 ) having an average particle diameter of 0.4 ⁇ m is added to silver or silver-palladium having an average particle diameter of 0.5 ⁇ m.
- the alloy powder was mixed so that the metal powder content was 5 to 20% by mass, and then a binder and a plasticizer were added to prepare an inorganic coating paste.
- This inorganic coating paste was printed on the side surface of the laminate other than the external electrode forming surface, dried and baked at a temperature of 980 to 1100 ° C.
- the thickness of the inorganic coat after baking was 10 ⁇ m.
- the inorganic coat paste was printed and dried, the inorganic coat paste was printed again, and then dried and baked at a temperature of 980 to 1100 ° C., the thickness of the inorganic coat was 20 ⁇ m.
- a silver glass paste prepared by adding glass, a binder, and a plasticizer to silver powder was printed on the side surface of the laminate in the pattern of the external electrode, dried, and baked at 700 ° C. to form an external electrode. Then, a lead wire was connected and fixed to the external electrode as an external lead member using solder.
- the laminated body in which the piezoelectric layer and the internal electrode are laminated the external electrode joined to the side surface of the laminated body and electrically connected to the internal electrode, and the inorganic coat deposited on the side surface of the laminated body
- a laminated piezoelectric element (Sample Nos. 2 to 4) according to an embodiment of the present invention was prepared.
- Sample No. 2 has about 5 ⁇ m of silver particles having an average particle diameter of 0.5 ⁇ m at the grain boundary of piezoelectric ceramics mainly composed of lead zirconate titanate (PZT: PbZrO 3 —PbTiO 3 ) having an average particle diameter of 2 ⁇ m.
- An inorganic coat having a thickness of 10 ⁇ m dispersed at intervals of
- Sample No. 3 is a zircon titanate having an average particle diameter of 2 ⁇ m on an inorganic coat having a thickness of 10 ⁇ m made of a piezoelectric ceramic mainly composed of lead zirconate titanate (PZT: PbZrO 3 —PbTiO 3 ) having an average particle diameter of 2 ⁇ m.
- An inorganic coat having a thickness of 5 mm is used.
- Sample No. 4 is a zircon titanate having an average particle diameter of 2 ⁇ m on an inorganic coat having a thickness of 10 ⁇ m made of a piezoelectric ceramic mainly composed of lead zirconate titanate (PZT: PbZrO 3 —PbTiO 3 ) having an average particle diameter of 2 ⁇ m.
- the inorganic coat has a thickness of 20 ⁇ m.
- an inorganic coating paste was prepared only from a calcined powder of piezoelectric ceramics mainly composed of lead zirconate titanate (PZT: PbZrO 3 -PbTiO 3 ) having an average particle size of 0.4 ⁇ m Then, an inorganic coat having a thickness of 10 ⁇ m made of piezoelectric ceramics mainly composed of lead zirconate titanate (PZT: PbZrO 3 —PbTiO 3 ) having an average particle diameter of 2 ⁇ m was prepared.
- PZT lead zirconate titanate
- Each of the laminated piezoelectric elements of Sample Nos. 1 to 4 was applied with an AC voltage of 0 V to +160 V at a frequency of 150 Hz in an atmosphere of 150 ° C., and continuously driven up to 1 ⁇ 10 6 times.
- a test was performed in which DC 150 V was applied for 300 hours in an atmosphere of% RH. The results are shown in Table 1.
- the multilayer piezoelectric elements (sample numbers 2 to 4) of the example of the present invention were continuously driven up to 1 ⁇ 10 6 times and then displaced by applying a DC voltage in a high temperature and high humidity environment.
- the leakage current does not occur on the side surface of the laminate, and that the displacement amount does not fluctuate and has high reliability.
- these samples were cut and the inside of the inorganic coat was observed with a scanning electron microscope (SEM), but there was no crack and no migration within the inorganic coat.
- the multilayer piezoelectric element of the comparative example (Sample No. 1) was continuously driven up to 1 ⁇ 10 6 times by applying an AC voltage of 0 V to +160 V, but the amount of displacement decreased.
- SEM scanning electron microscope
Abstract
Description
2・・・圧電体層
3・・・内部電極
310・・・正極の内部電極
320・・・負極の内部電極
5・・・無機コート
5A・・・積層体側面側の無機コート
5B・・・表面側の無機コート
51・・・金属粒子
6・・・外部電極
7・・・積層体
9・・・外部リード部材
11・・・圧電アクチュエータ
13・・・ケース
15・・・ケース本体
17・・・蓋部材
19・・・噴射装置
21・・・噴射孔
23・・・収納容器(容器)
25・・・ニードルバルブ
27・・・流体通路
29・・・シリンダ
31・・・ピストン
33・・・皿バネ
35・・・燃料噴射システム
37・・・コモンレール
39・・・圧力ポンプ
41・・・噴射制御ユニット
43・・・燃料タンク
Claims (8)
- 圧電体層と正極および負極としての内部電極とが積層された積層体と、該積層体の前記正極の内部電極および前記負極の内部電極の両方の端部があらわれた側面に設けられた無機コートとを備え、該無機コートの内部には前記内部電極に含まれる金属元素を主成分とした金属粒子が分散して含まれていることを特徴とする積層型圧電素子。
- 前記金属粒子は、前記無機コートの表面側に偏って分布していることを特徴とする請求項1に記載の積層型圧電素子。
- 前記無機コートには、前記積層体の側面側にボイドが設けられている請求項1に記載の積層型圧電素子。
- 前記無機コートは圧電材料からなる請求項1に記載の積層型圧電素子。
- 前記内部電極に含まれる金属元素が銀であり、前記金属粒子が銀粒子である請求項1に記載の積層型圧電素子。
- 請求項1に記載の積層型圧電素子と、該積層型圧電素子を内部に収容するケースとを備えた圧電アクチュエータ。
- 噴射孔を有する容器と、請求項1に記載の積層型圧電素子とを備え、前記容器内に蓄えられた流体が前記積層型圧電素子の駆動により前記噴射孔から吐出されることを特徴とする噴射装置。
- 高圧燃料を蓄えるコモンレールと、該コモンレールに蓄えられた前記高圧燃料を噴射する請求項7に記載の噴射装置と、前記コモンレールに前記高圧燃料を供給する圧力ポンプと、前記噴射装置に駆動信号を与える噴射制御ユニットとを備えたことを特徴とする燃料噴射システム。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/980,470 US9287486B2 (en) | 2011-01-21 | 2012-01-20 | Multi-layer piezoelectric element, and piezoelectric actuator, injection device, and fuel injection system provided with same |
EP12736843.9A EP2667425B1 (en) | 2011-01-21 | 2012-01-20 | Laminated-type piezoelectric element, and piezoelectric actuator, injection apparatus, and fuel injection system provided with same |
CN201280004730.8A CN103314459B (zh) | 2011-01-21 | 2012-01-20 | 层叠型压电元件及具备该层叠型压电元件的压电促动器、喷射装置以及燃料喷射系统 |
JP2012553777A JP5456179B2 (ja) | 2011-01-21 | 2012-01-20 | 積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置ならびに燃料噴射システム |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-011047 | 2011-01-21 | ||
JP2011011047 | 2011-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012099233A1 true WO2012099233A1 (ja) | 2012-07-26 |
Family
ID=46515850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/051171 WO2012099233A1 (ja) | 2011-01-21 | 2012-01-20 | 積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置ならびに燃料噴射システム |
Country Status (5)
Country | Link |
---|---|
US (1) | US9287486B2 (ja) |
EP (1) | EP2667425B1 (ja) |
JP (1) | JP5456179B2 (ja) |
CN (1) | CN103314459B (ja) |
WO (1) | WO2012099233A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013098168A1 (de) * | 2011-12-30 | 2013-07-04 | Continental Automotive Gmbh | Piezostack mit passivierung und verfahren zur passivierung eines piezostacks |
JP2014103222A (ja) * | 2012-11-19 | 2014-06-05 | Ngk Insulators Ltd | 圧電素子の製造方法 |
JP2015142027A (ja) * | 2014-01-29 | 2015-08-03 | 京セラ株式会社 | 積層型圧電素子、圧電アクチュエータおよびこれを備えたマスフローコントローラ |
JP2016066677A (ja) * | 2014-09-24 | 2016-04-28 | 京セラ株式会社 | 積層型圧電素子、圧電アクチュエータおよびこれを備えたマスフローコントローラ |
WO2018020921A1 (ja) * | 2016-07-26 | 2018-02-01 | 京セラ株式会社 | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2752899B1 (en) * | 2011-08-30 | 2016-06-29 | Kyocera Corporation | Laminated piezoelectric element and piezoelectric actuator, injection device, and fuel injection system provided with same |
CN105485708B (zh) * | 2015-12-04 | 2018-04-17 | 哈尔滨工程大学 | 一种基于超压密封的金属粉末燃料供应装置 |
US9786831B1 (en) * | 2016-01-27 | 2017-10-10 | Magnecomp Corporation | Suspension having a stacked D33 mode PZT actuator with constraint layer |
DE102019206018B4 (de) | 2019-04-26 | 2022-08-25 | Pi Ceramic Gmbh | Elektromechanischer Aktor mit keramischer Isolierung, Verfahren zu dessen Herstellung sowie Verfahren zur Ansteuerung eines solchen Aktors |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03108306A (ja) * | 1989-09-21 | 1991-05-08 | Murata Mfg Co Ltd | 積層コンデンサの製造方法 |
JP2001135871A (ja) | 1999-11-02 | 2001-05-18 | Tdk Corp | 積層型圧電体の製造方法 |
JP2002319718A (ja) * | 2001-02-19 | 2002-10-31 | Taiheiyo Cement Corp | 圧電トランスとその製造方法 |
JP2003101092A (ja) * | 2001-09-20 | 2003-04-04 | Kyocera Corp | 積層型圧電素子及びその製法並びに噴射装置 |
JP2006505144A (ja) * | 2002-12-23 | 2006-02-09 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | ピエゾアクチュエータおよびその製造方法 |
JP2007234799A (ja) * | 2006-02-28 | 2007-09-13 | Tdk Corp | 圧電素子 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS601877A (ja) * | 1983-06-20 | 1985-01-08 | Nippon Soken Inc | 積層型圧電体 |
DE10109994A1 (de) * | 2001-03-01 | 2002-09-05 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Piezotransformator mit großem Übersetzungsverhältnis |
JP2002319715A (ja) * | 2001-04-19 | 2002-10-31 | Denso Corp | 圧電体素子及びこれを用いたインジェクタ |
DE10329028A1 (de) * | 2002-07-11 | 2004-01-29 | Ceram Tec Ag Innovative Ceramic Engineering | Isolierung für piezokeramische Vielschichtaktoren |
JP2005286014A (ja) * | 2004-03-29 | 2005-10-13 | Denso Corp | 導電ペースト |
KR100876533B1 (ko) * | 2005-11-02 | 2008-12-31 | 가부시키가이샤 무라타 세이사쿠쇼 | 압전소자 |
WO2009041476A1 (ja) * | 2007-09-27 | 2009-04-02 | Kyocera Corporation | 積層型圧電素子、これを備えた噴射装置及び燃料噴射システム |
DE102008027115A1 (de) * | 2008-06-06 | 2009-12-24 | Continental Automotive Gmbh | Kontaktstruktur, elektronisches Bauelement mit einer Kontaktstruktur und Verfahren zu deren Herstellung |
WO2010024277A1 (ja) * | 2008-08-28 | 2010-03-04 | 京セラ株式会社 | 積層型圧電素子および噴射装置ならびに燃料噴射システム |
JP5414798B2 (ja) * | 2009-08-27 | 2014-02-12 | 京セラ株式会社 | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム |
-
2012
- 2012-01-20 US US13/980,470 patent/US9287486B2/en active Active
- 2012-01-20 JP JP2012553777A patent/JP5456179B2/ja active Active
- 2012-01-20 CN CN201280004730.8A patent/CN103314459B/zh active Active
- 2012-01-20 WO PCT/JP2012/051171 patent/WO2012099233A1/ja active Application Filing
- 2012-01-20 EP EP12736843.9A patent/EP2667425B1/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03108306A (ja) * | 1989-09-21 | 1991-05-08 | Murata Mfg Co Ltd | 積層コンデンサの製造方法 |
JP2001135871A (ja) | 1999-11-02 | 2001-05-18 | Tdk Corp | 積層型圧電体の製造方法 |
JP2002319718A (ja) * | 2001-02-19 | 2002-10-31 | Taiheiyo Cement Corp | 圧電トランスとその製造方法 |
JP2003101092A (ja) * | 2001-09-20 | 2003-04-04 | Kyocera Corp | 積層型圧電素子及びその製法並びに噴射装置 |
JP2006505144A (ja) * | 2002-12-23 | 2006-02-09 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | ピエゾアクチュエータおよびその製造方法 |
JP2007234799A (ja) * | 2006-02-28 | 2007-09-13 | Tdk Corp | 圧電素子 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2667425A4 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013098168A1 (de) * | 2011-12-30 | 2013-07-04 | Continental Automotive Gmbh | Piezostack mit passivierung und verfahren zur passivierung eines piezostacks |
US9887345B2 (en) | 2011-12-30 | 2018-02-06 | Continental Automotive Gmbh | Piezo-stack with passivation, and a method for the passivation of a piezo-stack |
JP2014103222A (ja) * | 2012-11-19 | 2014-06-05 | Ngk Insulators Ltd | 圧電素子の製造方法 |
JP2015142027A (ja) * | 2014-01-29 | 2015-08-03 | 京セラ株式会社 | 積層型圧電素子、圧電アクチュエータおよびこれを備えたマスフローコントローラ |
JP2016066677A (ja) * | 2014-09-24 | 2016-04-28 | 京セラ株式会社 | 積層型圧電素子、圧電アクチュエータおよびこれを備えたマスフローコントローラ |
WO2018020921A1 (ja) * | 2016-07-26 | 2018-02-01 | 京セラ株式会社 | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム |
JPWO2018020921A1 (ja) * | 2016-07-26 | 2019-04-11 | 京セラ株式会社 | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム |
Also Published As
Publication number | Publication date |
---|---|
CN103314459A (zh) | 2013-09-18 |
EP2667425A4 (en) | 2017-03-22 |
JPWO2012099233A1 (ja) | 2014-06-30 |
US20140026858A1 (en) | 2014-01-30 |
EP2667425A1 (en) | 2013-11-27 |
EP2667425B1 (en) | 2018-12-26 |
CN103314459B (zh) | 2015-03-25 |
US9287486B2 (en) | 2016-03-15 |
JP5456179B2 (ja) | 2014-03-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5456179B2 (ja) | 積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置ならびに燃料噴射システム | |
JP4933554B2 (ja) | 積層型圧電素子、これを用いた噴射装置及び燃料噴射システム、並びに積層型圧電素子の製造方法 | |
US20100066211A1 (en) | Multi-Layer Electronic Component and Method for Manufacturing the Same, Multi-Layer Piezoelectric Element | |
JPWO2008072767A1 (ja) | 積層型圧電素子、これを備えた噴射装置及び燃料噴射システム | |
US8857413B2 (en) | Multi-layer piezoelectric element, and injection device and fuel injection system using the same | |
WO2007037377A1 (ja) | 積層型圧電素子およびこれを用いた噴射装置 | |
WO2011093293A1 (ja) | 積層型圧電素子およびその製造方法、ならびにこの積層型圧電素子を備えた噴射装置、燃料噴射システム | |
JP5787547B2 (ja) | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム | |
WO2013031727A1 (ja) | 積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置ならびに燃料噴射システム | |
JP5856312B2 (ja) | 積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置ならびに燃料噴射システム | |
JP5203621B2 (ja) | 積層型圧電素子、これを備えた噴射装置及び燃料噴射システム | |
JP2012216875A (ja) | 積層型圧電素子、噴射装置、燃料噴射システム、及び積層型圧電素子の製造方法 | |
JP5697381B2 (ja) | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム | |
JP5562382B2 (ja) | 積層型圧電素子、これを備えた噴射装置及び燃料噴射システム | |
JP5419976B2 (ja) | 積層型圧電素子およびこれを用いた噴射装置ならびに燃料噴射システム | |
JP5705509B2 (ja) | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム | |
WO2012011302A1 (ja) | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム | |
JP5743608B2 (ja) | 積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置、燃料噴射システム | |
JP2012134377A (ja) | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム | |
WO2013146984A1 (ja) | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム | |
JP5701397B2 (ja) | 積層型圧電素子およびこれを備えた圧電アクチュエータ、噴射装置、燃料噴射システム | |
JP6698843B2 (ja) | 積層型圧電素子およびこれを備えた噴射装置ならびに燃料噴射システム | |
WO2009107700A1 (ja) | 積層型圧電素子、これを備えた噴射装置及び燃料噴射システム |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12736843 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2012553777 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012736843 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13980470 Country of ref document: US |