Stacked piezoelectric ceramic electrode

Abstract

The utility model relates to the technical field of electronic components, and discloses a stacked piezoelectric ceramic electrode, which comprises an upper insulating layer and a lower insulating layer, a piezoelectric component is mounted in the upper insulating layer, an insulating layer is fixedly connected outside the upper insulating layer, a leading-out component is mounted outside the upper insulating layer, and a lead-out pin is fixedly connected outside the leading-out component. The exterior of the upper insulating layer is fixedly connected with a fixed plate; the piezoelectric assembly comprises a positive electrode layer, the positive electrode layer is fixedly connected to the interior of the upper insulating layer, the exterior of the positive electrode layer is fixedly connected with a piezoelectric ceramic material film, and the exterior of the piezoelectric ceramic material film is fixedly connected with a piezoelectric ceramic piece. According to the utility model, under the direct piezoelectric effect, the multi-layer structure piezoelectric ceramic piece, the piezoelectric ceramic material film and the plurality of piezoelectric dielectric layers can more efficiently convert external weak mechanical force into electric signals and generate obvious charge change, so that the electric charge is accurately detected, and the sensitivity of the sensor is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic components technology, and in particular to a stacked piezoelectric ceramic electrode. Background Technology

[0002] Piezoelectric ceramics are a type of information-functional ceramic material that can convert mechanical energy and electrical energy into each other – the piezoelectric effect. In addition to piezoelectricity, piezoelectric ceramics also have dielectric and elastic properties, and have been widely used in medical imaging, acoustic sensors, acoustic transducers, ultrasonic motors, etc. Piezoelectric ceramics are made by utilizing the polarization caused by the relative displacement of the positive and negative charge centers inside the material under mechanical stress, resulting in the appearance of bound charges of opposite signs on the surfaces at both ends of the material, i.e., the piezoelectric effect, which gives them sensitive characteristics.

[0003] Existing stacked piezoelectric ceramics mostly employ relatively simple single-layer or few-layer designs, resulting in insufficiently significant positive piezoelectric effect. This leads to insignificant charge changes and weak signals when converting external mechanical forces into electrical signals, limiting the sensitivity of sensors and making it difficult to accurately detect subtle changes in physical quantities. To address this issue, a stacked piezoelectric ceramic electrode is proposed. Utility Model Content

[0004] To overcome the above shortcomings, this invention provides a stacked piezoelectric ceramic electrode, which aims to improve the problem that the positive piezoelectric effect is not significant enough and the resulting charge change is weak in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stacked piezoelectric ceramic electrode includes an upper insulating layer and a lower insulating layer. A piezoelectric component is installed inside the upper insulating layer. An insulating layer is fixedly connected to the outside of the upper insulating layer. An lead-out component is installed outside the upper insulating layer. A fixing plate is fixedly connected to the outside of the upper insulating layer.

[0007] The piezoelectric component includes a positive electrode layer, which is fixedly connected to the inside of the upper insulating layer. A piezoelectric ceramic material film is fixedly connected to the outside of the positive electrode layer, and a piezoelectric ceramic sheet is fixedly connected to the outside of the piezoelectric ceramic material film.

[0008] As a further description of the above technical solution:

[0009] The lead-out assembly includes a metal gasket, which is fixedly connected to the inside of the upper insulating layer, and an insulating epoxy resin is fixedly connected to the outside of the metal gasket.

[0010] As a further description of the above technical solution:

[0011] A negative electrode layer is fixedly connected to the outside of the piezoelectric ceramic sheet;

[0012] As a further description of the above technical solution:

[0013] Multiple piezoelectric dielectric layers are fixedly connected to the bottom of the negative electrode layer, and the piezoelectric dielectric layers are fixedly connected to the top of the positive electrode layer;

[0014] As a further description of the above technical solution:

[0015] A glass sheet is fixedly connected to the middle of the insulating layer, and the outside of the piezoelectric ceramic sheet is fixedly connected to the inside of the metal gasket.

[0016] As a further description of the above technical solution:

[0017] The insulating epoxy resin adhesive is fixedly connected to the inner side of the fixing plate;

[0018] As a further description of the above technical solution:

[0019] An outer positive electrode layer is fixedly connected inside the upper insulating layer, and a set of piezoelectric ceramic material thin films are fixedly connected to the bottom of the outer positive electrode layer;

[0020] As a further description of the above technical solution:

[0021] An outer negative electrode layer is fixedly connected inside the lower insulating layer, and a set of piezoelectric dielectric layers is fixedly connected outside the outer negative electrode layer.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, due to the use of a multi-layered piezoelectric ceramic sheet, a piezoelectric ceramic material film, and multiple piezoelectric dielectric layers, under the positive piezoelectric effect, it can more efficiently convert weak external mechanical forces into electrical signals, generating more obvious charge changes, thereby being accurately detected, and greatly improving the sensitivity of the sensor.

[0024] 2. In this invention, the upper insulating layer, lower insulating layer, and insulating layer provide comprehensive insulation protection for the entire device. This effectively prevents short circuits between electrodes and between electrodes and the external environment, ensuring a stable electric field acting on the piezoelectric component and guaranteeing the reliability and stability of the piezoelectric ceramic electrode operation. The glass sheet, while providing insulation, also prevents damage to the piezoelectric component from external mechanical scratches, dust, etc., thereby extending the service life of the entire stacked piezoelectric ceramic electrode and reducing maintenance costs. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a stacked piezoelectric ceramic electrode proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of a stacked piezoelectric ceramic electrode piezoelectric sheet proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the piezoelectric dielectric layer of a stacked piezoelectric ceramic electrode proposed in this utility model.

[0028] Legend:

[0029] 1. Upper insulating layer; 2. Fixing plate; 3. Insulating epoxy resin adhesive; 4. Lower insulating layer; 5. Glass plate; 6. Outer positive electrode layer; 7. Positive electrode layer; 8. Piezoelectric ceramic material film; 9. Piezoelectric ceramic sheet; 10. Negative electrode layer; 11. Piezoelectric dielectric layer; 12. Metal gasket; 13. Outer negative electrode layer; 14. Insulating layer. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 - Figure 3This utility model provides an embodiment of a stacked piezoelectric ceramic electrode, comprising an upper insulating layer 1 and a lower insulating layer 4. A piezoelectric component is installed inside the upper insulating layer 1, and an insulating layer 14 is fixedly connected to the outside of the upper insulating layer 1. An lead-out component is installed outside the upper insulating layer 1, and a fixing plate 2 is fixedly connected to the outside of the upper insulating layer 1. The piezoelectric component includes a positive electrode layer 7, which is fixedly connected inside the upper insulating layer 1. A piezoelectric ceramic material film 8 is fixedly connected to the outside of the positive electrode layer 7, and a piezoelectric ceramic sheet 9 is fixedly connected to the outside of the piezoelectric ceramic material film 8. According to the inverse piezoelectric effect, the electric dipoles inside the piezoelectric ceramic material film 8 and the piezoelectric ceramic sheet 9 will undergo orientation changes under the action of an electric field, thereby inducing their deformation. This deformation can be used to drive external devices to generate mechanical motion, such as in a micro-displacement platform, where nanometer-level or even higher precision displacement adjustment can be achieved by precisely controlling the applied voltage. The presence of the piezoelectric ceramic material film 8 can enhance the piezoelectric performance of the piezoelectric ceramic sheet 9 to a certain extent. Under the same electric field or mechanical force, a larger deformation or charge output can be generated. For example, in some piezoelectric sensors requiring high sensitivity, this structure can more keenly sense minute mechanical changes in the external environment and convert them into stronger electrical signals, improving the sensor's detection accuracy. A negative electrode layer 10 is fixedly connected to the outside of the piezoelectric ceramic sheet 9. Multiple piezoelectric dielectric layers 11 are fixedly connected to the bottom of the negative electrode layer 10, and the piezoelectric dielectric layers 11 are fixedly connected to the top of the positive electrode layer 7. This multi-layer structure design, including multiple piezoelectric dielectric layers 11 and a combination of the piezoelectric ceramic sheet 9 and the piezoelectric ceramic material film 8, increases the volume and area of ​​material capable of generating the piezoelectric effect. Under the positive piezoelectric effect, it can collect more charge compared to a single-layer piezoelectric structure, and under the inverse piezoelectric effect, it can generate greater deformation or driving force, thereby improving the piezoelectric conversion efficiency of the entire device and making it perform better in energy harvesting and driving applications. An outer positive electrode layer 6 is fixedly connected inside the upper insulating layer 1, and a set of piezoelectric ceramic material films 8 are fixedly connected to the bottom of the outer positive electrode layer 6. The lower insulating layer 4 is internally fixedly connected to an outer negative electrode layer 13, and the outer negative electrode layer 13 is externally fixedly connected to a set of piezoelectric dielectric layers 11. The fixed connection between the outer positive electrode layer 6 and the upper insulating layer 1, the outer negative electrode layer 13 and the lower insulating layer 4, and the tight arrangement between each layer enhance the mechanical stability of the entire stacked structure, enabling it to withstand greater external stress without damage.

[0032] Reference Figure 1 and Figure 2The lead-out component includes a metal gasket 12, which is fixedly connected to the inside of the upper insulating layer 1. An insulating epoxy resin adhesive 3 is fixedly connected to the outside of the metal gasket 12, ensuring reliable electrical insulation and enabling the entire stacked piezoelectric ceramic electrode to operate stably in complex electrical environments, reducing the risk of performance instability or damage due to electrical faults. A glass sheet 5 is fixedly connected to the middle of the insulating layer 14. The presence of the glass sheet 5 significantly improves the environmental adaptability of the entire device. It can resist the erosion of the sensitive internal piezoelectric structure by harsh external environmental factors, thereby extending the service life of the stacked piezoelectric ceramic electrode. It provides good protection for the internal structure, maintains its normal piezoelectric performance, and reduces maintenance costs and replacement frequency. The piezoelectric ceramic sheet 9 is fixedly connected to the inside of the metal gasket 12. The insulating epoxy resin adhesive 3 is fixedly connected to the inside of the fixing plate 2.

[0033] Working Principle: Under mechanical force, the piezoelectric ceramic sheet 9 deforms. Due to the positive piezoelectric effect, its internal crystal structure changes, leading to a relative displacement of the positive and negative charge centers. Polarization charges are generated on the upper and lower surfaces of the piezoelectric ceramic sheet 9. These polarization charges are collected by the positive electrode layer 7 and the negative electrode layer 10, which are closely connected to it. The positive electrode layer 7 and the negative electrode layer 10 conduct the charges to the outer positive electrode layer 6 and the outer negative electrode layer 13, and then conduct the charges to the external circuit through the metal gasket 12 and the insulating epoxy resin adhesive 3, realizing the conversion of mechanical energy into electrical energy. At the same time, the piezoelectric dielectric layer 11 is also subjected to mechanical force during this process, assisting the piezoelectric ceramic sheet 9 in enhancing the piezoelectric effect and contributing to the conduction and distribution of charges. According to the inverse piezoelectric effect, under the action of an electric field, the internal electric dipoles of the piezoelectric ceramic sheet 9 will change orientation, thereby causing the piezoelectric ceramic sheet 9 to deform. At the same time, the piezoelectric ceramic material film 8 is also affected by the electric field and deforms together with the piezoelectric ceramic sheet 9. The upper insulating layer 1, lower insulating layer 4, and insulating layer 14 provide comprehensive insulation protection for the entire device. In complex working environments, whether humid or subject to electromagnetic interference, they effectively prevent short circuits between electrodes or between electrodes and the external environment, ensuring a stable electric field acting on the piezoelectric component and guaranteeing the reliability and stability of the piezoelectric ceramic electrodes. By rationally designing the thickness and optical parameters of the glass plate 5, light can be focused, refracted, or reflected in the desired manner when passing through the piezoelectric ceramic electrode area, thereby improving the performance of the optoelectronic device.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stacked piezoelectric ceramic electrode comprising an upper insulating layer and a lower insulating layer, characterized by: The inside of the upper insulating layer is provided with a piezoelectric component, the outside of the upper insulating layer is fixedly connected with an insulating layer, the outside of the upper insulating layer is provided with a lead-out component, and the outside of the upper insulating layer is fixedly connected with a fixed plate; The piezoelectric component comprises a positive electrode layer, the positive electrode layer is fixedly connected to the inside of the upper insulating layer, the outside of the positive electrode layer is fixedly connected with a piezoelectric ceramic material film, and the outside of the piezoelectric ceramic material film is fixedly connected with a piezoelectric ceramic sheet.

2. A stacked piezoelectric ceramic electrode according to claim 1, characterized by: The lead-out component comprises a metal gasket, the metal gasket is fixedly connected to the inside of the upper insulating layer, and the outside of the metal gasket is fixedly connected with insulating epoxy resin glue.

3. The stacked piezoelectric ceramic electrode according to claim 1, characterized by: The outside of the piezoelectric ceramic sheet is fixedly connected with a negative electrode layer.

4. A stacked piezoelectric ceramic electrode according to claim 3, wherein: The bottom of the negative electrode layer is fixedly connected with a plurality of piezoelectric dielectric layers, and the piezoelectric dielectric layers are fixedly connected to the top of the positive electrode layer.

5. A stacked piezoelectric ceramic electrode according to claim 2, wherein: The middle of the insulating layer is fixedly connected with a glass sheet, and the outside of the piezoelectric ceramic sheet is fixedly connected to the inside of the metal gasket.

6. A stacked piezoelectric ceramic electrode according to claim 2, wherein: The insulating epoxy resin glue is fixedly connected to the inner side of the fixed plate.

7. The stacked piezoelectric ceramic electrode according to claim 1, characterized by: The inside of the upper insulating layer is fixedly connected with an outer positive electrode layer, and the bottom of the outer positive electrode layer is fixedly connected with a group of piezoelectric ceramic material films.

8. The stacked piezoelectric ceramic electrode according to claim 1, characterized by: The inside of the lower insulating layer is fixedly connected with an outer negative electrode layer, and the outside of the outer negative electrode layer is fixedly connected with a group of piezoelectric dielectric layers.

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