WO2016032029A1 - 적층형 압전 세라믹 소자 - Google Patents
적층형 압전 세라믹 소자 Download PDFInfo
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- WO2016032029A1 WO2016032029A1 PCT/KR2014/008066 KR2014008066W WO2016032029A1 WO 2016032029 A1 WO2016032029 A1 WO 2016032029A1 KR 2014008066 W KR2014008066 W KR 2014008066W WO 2016032029 A1 WO2016032029 A1 WO 2016032029A1
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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
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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
- H10N30/01—Manufacture or treatment
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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
- H10N30/01—Manufacture or treatment
- H10N30/05—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes
- H10N30/053—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes by integrally sintering piezoelectric or electrostrictive bodies and electrodes
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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
- H10N30/01—Manufacture or treatment
- H10N30/05—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes
- H10N30/057—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes by stacking bulk piezoelectric or electrostrictive bodies and electrodes
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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
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
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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
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
- H10N30/8548—Lead based oxides
- H10N30/8554—Lead zirconium titanate based
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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
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
- H10N30/877—Conductive materials
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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
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
- H10N30/883—Further insulation means against electrical, physical or chemical damage, e.g. protective coatings
Definitions
- the present invention relates to a multilayer piezoelectric ceramic device, and more particularly, to cover a top and a bottom of an actuator ceramic laminate and include a plurality of dummy ceramic layers formed of a ceramic porous body, and impregnated with an organic insulating resin solution in a high humidity environment.
- the present invention relates to a multilayer piezoelectric ceramic device having improved waterproof performance that can prevent deterioration of insulation resistance.
- ceramic materials are widely used in the case of piezoelectric materials that are deformed when electricity is applied or electricity is applied when pressure is applied.
- the piezoelectric ceramic technology refers to a technology that configures a module that generates electricity when a physical pressure is applied as a ceramic device.
- a piezoelectric ceramic technology refers to a device having a characteristic of changing electrical energy and mechanical energy from each other. .
- the piezoelectric element generates a voltage by the force applied to the piezoelectric ceramic, and the amount of the generated voltage varies depending on the strength of the piezoelectric element.
- Such a piezoelectric ceramic device has a feature of precisely controlling displacement with high responsiveness.
- a large displacement can be obtained even with a small voltage.
- multilayer piezoelectric ceramic elements have been widely applied to injectors, micropumps, inkjet heads, and speakers.
- the stacked piezoelectric ceramic device forms an actuator stack having a structure in which an actuator ceramic layer and an internal electrode are alternately stacked, and the external electrode is formed on the uppermost layer, the lowest layer, or the side of the laminate.
- the conventional technology of forming a moisture-proof film inside the laminated piezoelectric ceramic device has a problem that it is difficult to apply to a product having a large area of the polarization internal electrode, and the penetration of moisture by protecting the polarization internal electrode and the piezoelectric ceramic layer with an inorganic material.
- the technique for suppressing the problem has a problem in that the actuator driving force is lowered because the thickness of the inorganic material must be sufficiently secured.
- the present invention has been made to solve the above problems, the present invention is provided with a plurality of dummy ceramic layer formed of a ceramic porous body covering the top and bottom of the actuator ceramic laminate and impregnated with an organic insulating resin solution
- the present invention provides a multilayer piezoelectric ceramic device having improved waterproof performance to prevent deterioration of insulation resistance in a high humidity environment.
- a multilayer piezoelectric ceramic device having improved waterproof performance includes a multilayer piezoelectric ceramic device in which two or more ceramic green sheets are stacked to form the multilayer piezoelectric ceramic device.
- the organic insulating resin may be contained in the pores or the defects of the ceramics in which the organic resin is impregnated, and a waterproof coating layer may be formed around the inner electrode.
- the multilayer piezoelectric ceramic device having improved waterproof performance includes an actuator ceramic including a plurality of actuator ceramic layers formed between internal electrodes or between internal electrodes and external electrodes. Laminate; And a dummy ceramic layer covering at least one surface of both upper and lower sides of the actuator ceramic laminate, and the porosity of the dummy ceramic layer may be 0.5% to 5.0%.
- a multilayer piezoelectric ceramic device having improved waterproof performance may have a process of removing an organic resin attached to a surface of the multilayer piezoelectric ceramic device.
- a multilayer piezoelectric ceramic device having improved waterproof performance may be bonded to a vibration plate formed of one of metal, inorganic, and organic materials.
- the internal electrode and the external electrode may be formed of Ag or Ag / Pd material.
- the actuator ceramic layer may be formed of a piezoelectric ceramic material including a PZT series.
- a multilayer piezoelectric ceramic device having improved waterproof performance may have a process of vacuum impregnation or pressure impregnation of an organic resin.
- the multilayer piezoelectric ceramic element is impregnated with an organic insulating resin solution such as silicon to have a structure in which pores constituting the dummy ceramic layer are impregnated with an organic insulating resin so that moisture flows into the internal electrode. It is possible to prevent this, and thereby has the effect of providing a laminated piezoelectric ceramic device capable of preventing degradation of the insulation resistance in a high humidity environment.
- the porosity can be controlled by a method of forming a dummy ceramic green sheet using a ceramic piezoelectric material having a higher sintering temperature than the actuator ceramic green sheet, a multilayer piezoelectric ceramic device having a high moisture-proof effect can be easily manufactured. It can be effective.
- the present invention even if the organic insulating resin coating layer formed on the surface during the impregnation process of the multilayer piezoelectric ceramic element, the organic insulating resin is contained in the pores of the ceramic porous body constituting the ceramic layer is easy to contact with the diaphragm, yet waterproof performance There is an effect of providing a laminated piezoelectric ceramic device capable of preventing a decrease in
- FIG. 1 is a plan view and a side view of a multilayer piezoelectric ceramic device having improved waterproof performance according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a-a 'shown in FIG. 1.
- FIG. 3 is a flowchart illustrating a method of manufacturing a multilayer piezoelectric ceramic device having improved waterproof performance according to another exemplary embodiment of the present invention.
- Figure 4 is a process diagram more specifically shown to apply the flow chart of Figure 3 to the experimental example of the present invention.
- FIG. 5 is a view for explaining a process of removing the coating liquid of the multilayer piezoelectric ceramic element after the impregnation process shown in FIG. 4 according to an experimental example of the present invention.
- the laminated piezoelectric ceramic device having improved waterproof performance relates to a laminated piezoelectric ceramic device manufactured by stacking two or more ceramic green sheets, and includes a diaphragm for amplifying vibration generated in the laminated piezoelectric ceramic device. It can be applied to the piezoelectric speaker.
- the diaphragm may be a metal material, an inorganic material such as a polymer, and an organic material such as pulp.
- FIG. 1 is a plan view and a side view of a multilayer piezoelectric ceramic device having improved waterproof performance according to an embodiment of the present invention
- FIG. 2 is a cross-sectional view of a-a 'shown in FIG. 1.
- the laminated piezoelectric ceramic device 100 with improved waterproof performance may include an electrode 130.
- the actuator ceramic laminate 110 is formed between the plurality of internal electrodes 111 and the plurality of internal electrodes 111 respectively formed by being printed on two or more ceramic green sheets.
- the plurality of actuator ceramic layers 112 may be electrically connected to each other between the two internal electrodes.
- the internal electrode 111 may be formed of an electrode material of Ag (Silver) or Ag-Pd (Silver-Palladium), and the plurality of actuator ceramic layers 112 may include a PZT-PNN-based piezoelectric ceramic material. It can be manufactured using.
- the actuator ceramic layer 112 may be formed of a portion in which the internal electrode 111 is formed and a portion in which the internal electrode 112 is not formed, as illustrated in the cross-sectional view of FIG. 2. In the case of the internal electrodes disposed outside the lowermost layer, the internal electrodes may be entirely formed on the contact surfaces of the adjacent actuator ceramic layers.
- the plurality of dummy ceramic layers 120 are disposed to cover the uppermost and lowermost portions of the actuator ceramic laminate 110 while each surface thereof is exposed to air and flows into the actuator ceramic layer 112. It may serve to block moisture primarily, and may be formed of a ceramic porous body having a higher porosity than the actuator ceramic layer 112.
- the porosity of the ceramic porous body constituting the plurality of dummy ceramic layers may be within 0.5 to 5.0%, and for this purpose, the sintering temperature is relatively higher than that of the actuator ceramic layer 112 constituting the actuator ceramic laminate 110.
- porosity can be controlled.
- the ceramic material constituting the actuator ceramic layer 112 may have a sintering temperature of 1,050 ° C.
- the ceramic material constituting the dummy ceramic layer 111 has a sintering temperature of 1,000 ° C.
- the porosity of the ceramic layer formed of the porous body can be controlled by using.
- the multilayer piezoelectric ceramic device having improved waterproof performance includes a multilayer piezoelectric ceramic device having a plurality of dummy ceramic layers formed of a ceramic porous body covering the top and bottom of the actuator ceramic laminate. Moisture can easily be prevented from penetrating inside.
- the external electrode 130 is formed in the vertical direction in which both side ends of the actuator ceramic laminate 110 face each other, and both ends thereof are the top and side views of FIG. 1.
- the plurality of dummy ceramic layers 120 may be formed at outer edges of the plurality of dummy ceramic layers 120.
- the external electrode 130 is disposed outside the actuator ceramic laminate 110 to perform a function of applying power from the outside, and may be formed of an electrode material of Ag (Silver). have.
- the laminated piezoelectric ceramic device with improved waterproof performance according to an embodiment of the present invention, as shown in Figures 3 to 4 to be described later, in the pores of the ceramic layer formed of a porous body impregnated with an organic insulating resin solution
- the organic insulating resin may be impregnated, and a waterproof coating layer may be formed around the internal electrodes of the actuator ceramic laminate.
- the organic insulating resin solution is preferably a silicon solution, and when the organic insulating resin solution coating layer is formed on the surface of the plurality of dummy ceramic layer 120 and the external electrode 130 during the impregnation process, it will be described later in FIG.
- the piezoelectric speaker device may be implemented by combining with a diaphragm formed of any one of metal, inorganic, and organic materials.
- the organic insulating resin solution coating layer on the surface of the device is removed, the organic insulating resin is contained in the pores of the ceramic layer formed of the porous body, thereby preventing the degradation of the waterproof performance.
- the multilayer piezoelectric ceramic device according to the embodiment of the present invention may be impregnated with an organic insulating resin solution such as silicon to prevent moisture from entering the internal electrodes, thereby preventing deterioration of insulation resistance in a high humidity environment.
- an organic insulating resin solution such as silicon
- FIG. 3 is a flowchart illustrating a method of manufacturing a multilayer piezoelectric ceramic device having improved waterproof performance according to another exemplary embodiment of the present invention.
- the method of manufacturing a multilayer piezoelectric ceramic device having improved waterproof performance the first step (S10) of preparing a ceramic green sheet, an internal electrode on the ceramic green sheet
- a second step (S20) of forming a third step (S30) of forming an laminated piezoelectric element molded body by stacking an actuator green sheet and an inert dummy green sheet on which internal electrodes are formed
- a seventh step S70 of forming the piezoelectric ceramic device may be included.
- the first step S10 may include dummy ceramic green having a relatively higher sintering temperature than the actuator ceramic green sheet and the actuator ceramic green sheet using two piezoelectric ceramic materials having different sintering temperatures.
- the preparing of the sheets may include controlling porosity of the piezoelectric ceramic material constituting the dummy ceramic green sheet in order to improve waterproof performance.
- the ceramic green sheet used in another embodiment of the present invention may be manufactured using a slurry for piezoelectric elements manufactured by mixing PZT-PNN-based piezoelectric ceramic powder, an organic solvent, a binder, a plasticizer, and a dispersant with a ball mill.
- the second step (S20) is a step of forming an internal electrode on the actuator ceramic green sheet, when the ceramic green sheet having a thickness of 30 ⁇ m ⁇ 100 ⁇ m using the above-described slurry for piezoelectric elements is produced inside the polarization
- the electrode may be formed on the green sheet by printing.
- the dummy ceramic green sheet is disposed on the uppermost layer and the lower layer, respectively, and is pressed into a laminated structure in which a plurality of actuator ceramic green sheets in which the internal electrodes are formed are pressed into a laminated structure and then spaced apart at a predetermined interval. Cutting to form a multilayer piezoelectric element molded body.
- the fourth step (S40) may be the step of first firing at a temperature lower than the sintering temperature of the actuator ceramic green sheet to de-bind the multilayer piezoelectric element molded body.
- the multilayer piezoelectric element molded body in which the primary firing is completed is secondarily baked at the sintering temperature of the actuator ceramic green sheet, thereby forming an upper portion of the actuator ceramic laminate and the actuator ceramic laminate. It may be a step of forming a laminated piezoelectric element sintered body covering a lower portion and including a plurality of dummy ceramic layers made of a ceramic porous body.
- the porosity of the ceramic porous body forming the dummy ceramic layer is the actuator ceramic layer. It is formed larger than the porosity of the ceramic porous body constituting the can improve the penetration rate of the organic insulating resin solution in the impregnation process to be described later.
- the sixth step S60 may be a step of forming an external electrode on the laminated piezoelectric element sintered body in which secondary firing is completed and tertiary firing at a temperature lower than the sintering temperature of the actuator ceramic green sheet.
- the external electrode is formed in various shapes, for example, in the vertical direction of the side of the stacked piezoelectric element according to the structure of the device arranged to smoothly perform the function of the external power is applied to the upper and lower Although both ends are located, it can be printed in various patterns in some cases.
- the seventh step S70 may be a step of forming a laminated piezoelectric ceramic device having polarization completed by applying power to an external electrode of the laminated piezoelectric element sintered body in which tertiary firing is completed.
- a method of manufacturing a multilayer piezoelectric ceramic device having improved waterproof function may include dummy ceramics having a porosity of 0.5 to 5.0% in the uppermost layer and the lowermost layer of the multilayer piezoelectric element sintered body in the fifth step.
- a layer may be formed and an actuator ceramic laminate including a plurality of internal electrodes and a plurality of actuator ceramic layers formed between the plurality of internal electrodes may be formed between the dummy ceramic layers.
- the polarization-completed multilayer piezoelectric ceramic element is impregnated with an organic insulating resin solution to fill the pores of the ceramic layer constituting the multilayer piezoelectric ceramic element, thereby filling the interior of the actuator ceramic laminate.
- An eighth step S80 of forming the waterproof coating layer around the electrode may be further included.
- removing the plurality of dummy ceramic layers and the organic insulating resin solution coating layer formed on the surface of the external electrode through the sandblasting process may include.
- the method of manufacturing a multilayer piezoelectric ceramic device having improved waterproof function is a method of forming a dummy ceramic green sheet using a ceramic piezoelectric material having a higher sintering temperature than an actuator ceramic green sheet. Since the porosity can be controlled, a multilayer piezoelectric ceramic device having a high moisture-proof effect can be easily manufactured, and the whole layered piezoelectric ceramic device can be impregnated with an organic insulating resin solution such as silicon to increase the moisture-proof effect.
- Figure 4 is a process diagram more specifically shown to apply the flow chart of Figure 3 to the experimental example of the present invention.
- a multilayer piezoelectric ceramic device molded product having a porosity of 0.3%, 0.54%, 1.2%, 4.8%, and 9.3% of the dummy ceramic layer may be manufactured.
- a PZT-PNN-based piezoelectric ceramic powder, an organic solvent, a binder, a plasticizer, and a dispersant are mixed by a ball mill to prepare a slurry. (Produced separately for actuator ceramics and dummy ceramics with different sintering temperatures.)
- the ceramic green sheet for the actuator having a thickness of 30 ⁇ m to 100 ⁇ m and the dummy ceramic green sheet having a thickness of 20 ⁇ m are prepared using the slurry.
- a ceramic laminated structure is formed by placing a plurality of ceramic grit sheets for actuators inward and a dummy ceramic greensheet outward.
- the green sheet of the ceramic laminate structure is pressed and cut to form a ceramic molded body.
- the ceramic molded body was placed in a sealed container and fired at 1050 ° C. for 2 hours to obtain a laminated piezoelectric ceramic sintered body.
- the laminated piezoelectric ceramic element was formed of an actuator ceramic layer composed of an actuator ceramic layer having an electrode distance of 0.075 mm, and a dummy ceramic layer having a thickness of 20 ⁇ m above and below the ceramic laminate as a protective layer to prevent water inflow.
- Margin of the external electrode is 0.15mm.
- the sample to be tested was impregnated with a sample after firing the external electrode in a silicon solution and impregnated for 30 min in a reduced pressure environment close to a vacuum state so as to permeate well into the pores of the ceramic porous body.
- the porosity is 9.3%
- the resin impregnation effect was obtained, but it was found to be insufficient. This may be because the pores are mostly coated on the surface of the piezoelectric ceramic element in the case of the internal ceramic and do not penetrate to the inside. Therefore, when the porosity is high, impregnation of the resin may be insufficient, so that a sufficient effect may not be obtained to prevent degradation of the insulation resistance.
- the impregnation of the organic insulating solution resin but also the porosity of the dummy ceramic layer should be controlled between 0.5% to 5.0%.
- FIG. 5 is a view for explaining a process of removing the coating liquid of the laminated piezoelectric ceramic element (sample) after the impregnation shown in FIG. 4 according to the experimental example of the present invention.
- the surface of the sample impregnated with the silicone resin was sandblasted by sandblasting to polish the surface.
- the surface polished sample was attached to the SUS plate acting as a metal vibration plate using epoxy resin and then subjected to the insulation resistance deterioration experiment.
- the resin only coats the surface of the laminated piezoelectric ceramic element (sample), and is impregnated into the pores of the ceramic layer formed of the porous body, thereby preventing the inflow of moisture.
- the present invention by impregnating the multilayer piezoelectric ceramic element with an organic insulating resin solution such as silicon to have a structure in which the organic insulating resin is impregnated in the pores constituting the dummy ceramic layer to prevent moisture from entering the internal electrode.
- an organic insulating resin solution such as silicon
- This can provide an effect of providing a laminated piezoelectric ceramic device capable of preventing degradation of the insulation resistance in a high humidity environment.
- the porosity can be controlled by a method of forming a dummy ceramic green sheet using a ceramic piezoelectric material having a higher sintering temperature than the actuator ceramic green sheet, a multilayer piezoelectric ceramic device having a high moisture-proof effect can be easily manufactured. It can be effective.
- the present invention even when removing the organic insulating resin coating layer formed on the surface during the impregnation process of the multilayer piezoelectric ceramic element, the organic insulating resin is contained in the pores of the ceramic porous body constituting the ceramic layer is easy to contact with the diaphragm, yet waterproof performance There is an effect of providing a laminated piezoelectric ceramic device capable of preventing a decrease in
Abstract
Description
Active Layer | Dummy Layer | Dummy layerPorosity | |
Item1 | Powder1 | Powder1 | 0.3% |
Item2 | Powder1 | Powder2 | 0.54% |
Item3 | Powder1 | Powder3 | 1.2% |
Item4 | Powder1 | Powder4 | 4.8% |
Item5 | Powder1 | Powder5 | 9.3% |
ReginImpregnation | ActiveLayer | DummyLayer | DummyLayerPorosity | IR decreased | ||||
3Hr | 10Hr | 24Hr | 100Hr | |||||
Item1 | O | Powder1 | Powder1 | 0.3% | 0/20 | 0/20 | 0/20 | 2/20 |
Item2 | O | Powder1 | Powder2 | 0.54% | 0/20 | 0/20 | 0/20 | 0/20 |
Item3 | O | Powder1 | Powder3 | 1.2% | 0/20 | 0/20 | 0/20 | 0/20 |
Item4 | O | Powder1 | Powder4 | 4.8% | 0/20 | 0/20 | 0/20 | 0/20 |
Item5 | O | Powder1 | Powder5 | 9.3% | 1/20 | 7/20 | 20/20 | - |
Item6 | X | Powder1 | Powder1 | 0.3% | 0/20 | 0/20 | 0/20 | 3/20 |
Item7 | X | Powder1 | Powder2 | 0.54% | 0/20 | 2/20 | 6/20 | 11/20 |
Item8 | X | Powder1 | Powder3 | 1.2% | 3/20 | 8/20 | 15/20 | 20/20 |
Item9 | X | Powder1 | Powder4 | 4.8% | 9/20 | 20/20 | - | - |
Item10 | X | Powder1 | Powder5 | 9.3% | 20/20 | - | - | - |
ResinImpregnation | ResinRemove | ActiveLayer | DummyLayer | DummyLayerPorosity | Adhesion | IR decreased | ||||
3Hr | 10Hr | 24H4 | 100Hr | |||||||
Item1 | O | X | Powder1 | Powder1 | 0.3% | NG | 0/20 | 0/20 | 0/20 | 2/20 |
Item11 | O | O | Powder1 | Powder1 | 0.3% | OK | 0/20 | 0/20 | 0/20 | 3/20 |
Item12 | O | O | Powder1 | Powder3 | 0.54% | OK | 0/20 | 0/20 | 0/20 | 0/20 |
Item13 | O | O | Powder1 | Powder4 | 1.2% | OK | 0/20 | 0/20 | 0/20 | 0/20 |
Item14 | O | O | Powder1 | Powder5 | 4.8% | OK | 0/20 | 0/20 | 0/20 | 0/20 |
Claims (7)
- 두 개 이상의 세라믹 그린 시트가 적층되어 제조되는 적층형 압전 세라믹 소자에 있어서상기 적층형 압전 세라믹 소자를 구성하는 세라믹의 기공부 또는 결함부에 유기 수지가 함침된 구조를 갖는 것을 특징으로 하는 적층형 압전 세라믹 소자.
- 제 1항에 있어서,내부전극 사이 또는 내부전극과 외부전극 사이에 형성되는 다수개의 액츄에이터 세라믹층을 포함하는 액츄에이터 세라믹 적층체; 및상기 액츄에이터 세라믹 적층체의 상하 양측면중 어느 일면 이상을 커버하는 더미 세라믹층;을 포함하고,상기 더미 세라믹층의 기공율을 0.5% ~ 5.0%로 하는 것을 특징으로 하는 방수성능을 개선한 적층형 압전 세라믹 소자
- 제 2항에 있어서,적층형 압전 세라믹 소자 표면에 부착된 유기수지를 제거하는 공정을 갖는 것을 특징으로 하는 적층형 압전 세라믹 소자
- 제 3항에 있어서,금속, 무기, 및 유기 물질 중 하나의 재료로 형성되는 진동판과 접착되어 있는 것을 특징으로 하는 적층형 압전 세라믹 소자
- 제 2항에 있어서, 상기 내부전극 및 외부전극은,Ag 또는 Ag/Pd 재질로 형성되는 것을 특징으로 하는 적층형 압전 세라믹 소자
- 제 2항에 있어서, 상기 액츄에이터 세라믹층은,PZT계열을 포함하는 압전 세라믹 재료로 형성되는 것을 특징으로 하는 적층형 압전 세라믹 소자
- 제 2항에 있어서,유기수지를 진공 함침 또는 가압 함침 하는 공정을 갖는 것을 특징으로 하는 적층형 압전 세라믹 소자
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2017531426A JP6417479B2 (ja) | 2014-08-29 | 2014-08-29 | 積層型圧電セラミック素子 |
US15/506,984 US10622542B2 (en) | 2014-08-29 | 2014-08-29 | Stacked piezoelectric ceramic element |
CN201480081623.4A CN106716660B (zh) | 2014-08-29 | 2014-08-29 | 层叠式压电陶瓷元件 |
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KR1020140113896A KR101620296B1 (ko) | 2014-08-29 | 2014-08-29 | 적층형 압전 세라믹 소자 |
KR10-2014-0113896 | 2014-08-29 |
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WO2016032029A1 true WO2016032029A1 (ko) | 2016-03-03 |
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US (1) | US10622542B2 (ko) |
JP (1) | JP6417479B2 (ko) |
KR (1) | KR101620296B1 (ko) |
CN (1) | CN106716660B (ko) |
WO (1) | WO2016032029A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20220059751A1 (en) * | 2019-02-08 | 2022-02-24 | Pi Ceramic Gmbh | Method for producing a piezoelectric stack actuator, and piezoelectric stack actuator |
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JP1565481S (ko) * | 2016-05-25 | 2016-12-19 | ||
USD857020S1 (en) * | 2016-05-25 | 2019-08-20 | Tdk Corporation | Piezoelectric element |
KR101876467B1 (ko) * | 2017-03-21 | 2018-07-11 | 한국세라믹기술원 | 점자 디스플레이용 액츄에이터 |
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- 2014-08-29 CN CN201480081623.4A patent/CN106716660B/zh not_active Expired - Fee Related
- 2014-08-29 WO PCT/KR2014/008066 patent/WO2016032029A1/ko active Application Filing
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Also Published As
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JP6417479B2 (ja) | 2018-11-07 |
CN106716660B (zh) | 2019-09-13 |
US20170288124A1 (en) | 2017-10-05 |
US10622542B2 (en) | 2020-04-14 |
JP2017528924A (ja) | 2017-09-28 |
KR101620296B1 (ko) | 2016-05-13 |
CN106716660A (zh) | 2017-05-24 |
KR20160027391A (ko) | 2016-03-10 |
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