CN114389479A - Piezoelectric ceramic and device thereof - Google Patents
Piezoelectric ceramic and device thereof Download PDFInfo
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- CN114389479A CN114389479A CN202210044878.XA CN202210044878A CN114389479A CN 114389479 A CN114389479 A CN 114389479A CN 202210044878 A CN202210044878 A CN 202210044878A CN 114389479 A CN114389479 A CN 114389479A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 156
- 239000004020 conductor Substances 0.000 claims abstract description 49
- 239000013078 crystal Substances 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 description 14
- 238000001035 drying Methods 0.000 description 7
- 238000007747 plating Methods 0.000 description 6
- 230000010287 polarization Effects 0.000 description 6
- 238000007639 printing Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 3
- 238000004814 ceramic processing Methods 0.000 description 3
- 235000012431 wafers Nutrition 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000011267 electrode slurry Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
Abstract
The invention relates to the technical field of piezoelectric ceramics, in particular to a piezoelectric ceramic and a device thereof, wherein the piezoelectric ceramic comprises: the seat tool clamp comprises at least two conductors for clamping the piezoelectric ceramic piece, and the two conductors are respectively provided with an electric connection point of an external power supply; the electric connection point is connected with a power supply; therefore, the piezoelectric ceramic is convenient to process, energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the technical field of piezoelectric ceramics, in particular to piezoelectric ceramics and a device thereof.
Background
The piezoelectric ceramic is a special ceramic material widely applied to the fields of ultrasound, electroacoustic, communication, distance measurement, underwater acoustic detection, sensing and the like. Conversely, when a voltage is applied to the two electrodes, the piezoelectric ceramic is deformed, which is called inverse piezoelectric effect. As shown in fig. 1A: when the direct current voltage is positive, the thickness of the piezoelectric ceramic is increased; as shown in fig. 1B: when the direct current voltage is reversed, the thickness of the piezoelectric ceramic is reduced; as shown in fig. 1C: when the voltage applied to the electrodes is a high-frequency alternating current signal, the piezoelectric ceramic can be deformed alternately in a stretching way, so that vibration is generated, and ultrasonic waves are emitted.
The polarization of the piezoelectric ceramic is that direct current voltage is applied to electrodes on two corresponding surfaces of the piezoelectric ceramic to orderly turn electric domains in the piezoelectric ceramic, so that the piezoelectric ceramic material with positive and negative polarities and a piezoelectric effect is formed. In order to polarize the piezoelectric ceramic so that the piezoelectric ceramic has a piezoelectric effect (inverse piezoelectric effect), metal electrodes are formed on both surfaces of the piezoelectric ceramic sheet. The conventional production flow of piezoelectric ceramics is shown in fig. 2, wherein the conventional methods for applying electrodes include: printing metal powder slurry, drying, sintering again, vacuum plating, chemical plating and the like. The piezoelectric ceramic has no piezoelectric effect before being unpolarized, and can generate the piezoelectric effect or inverse piezoelectric effect only after being polarized. Therefore, the electrode slurry used in the traditional process contains more organic solvents, so that a large amount of waste gas is inevitably discharged in the process of drying and burning the electrode, and the atmospheric pollution is caused.
In summary, the conventional processing technology of piezoelectric ceramics obviously has inconvenience and defects in practical use, so that improvement is needed.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a piezoelectric ceramic and a device thereof, so as to provide a piezoelectric ceramic which is easy to process, energy-saving and environment-friendly.
In order to achieve an object of the present invention, the present invention provides a piezoelectric ceramic comprising:
at least one piezoelectric ceramic plate is arranged on the base,
the seat tooling fixture comprises at least two conductors for clamping the piezoelectric ceramic plate, and the two conductors are respectively provided with an electric connection point of an external power supply; the electric connection point is connected with a power supply;
when the two electric conductors exert clamping force on the piezoelectric ceramic piece, the electric connection point is connected with high-voltage direct current, so that the piezoelectric ceramic piece is coated with electrodes and/or polarized.
According to the piezoelectric ceramic, the piezoelectric ceramic comprises a plurality of piezoelectric ceramic pieces;
the seat tooling fixture comprises a plurality of conductors which are arranged in a stacked mode, and one piezoelectric ceramic piece is clamped between every two conductors.
According to the piezoelectric ceramic, the plurality of stacked conductors are connected in parallel; and a plurality of piezoelectric ceramic plates clamped among the plurality of laminated conductors are connected in parallel to form a crystal stack.
The piezoelectric ceramic according to, comprising: the crystal stacking device comprises a plurality of crystal stacks, wherein the crystal stacks are arranged in parallel and are connected in parallel.
According to the piezoelectric ceramics, the thickness of each piezoelectric ceramics piece is equal or unequal or partially equal;
the piezoelectric ceramic plate is round, rectangular, annular, triangular or trapezoidal;
the shape of the electric conductor is matched with the electric ceramic sheet.
According to the piezoelectric ceramic, the thickness of each of the conductors is equal.
According to the piezoelectric ceramic, the piezoelectric ceramic piece is an electrodeless piezoelectric ceramic piece; the electric conductor is a metal plate.
In order to achieve another object of the present invention, the present invention also provides a piezoelectric ceramic device including the piezoelectric ceramic described in any one of the above.
According to the piezoelectric ceramic device, two adjacent piezoelectric ceramic pieces are led out by taking a conductor as an electrode; and high-voltage alternating current is connected to the electrodes of the piezoelectric ceramic plate.
According to the piezoelectric ceramic device, the piezoelectric ceramic device is an ultrasonic transducer or a generator.
The invention provides a piezoelectric ceramic, which comprises: the seat tool clamp comprises at least one piezoelectric ceramic piece and a seat tool clamp, wherein at least two conductors of the seat tool clamp are used for clamping the piezoelectric ceramic piece, and the two conductors are respectively provided with an electric connection point of an external power supply; the electric connection point is connected with a power supply; when the two electric conductors exert clamping force on the piezoelectric ceramic piece, the electric connection point is connected with high-voltage direct current, so that the piezoelectric ceramic piece is coated with electrodes and/or polarized. Therefore, the electrode is not required to be coated on the piezoelectric ceramic by adopting the traditional piezoelectric ceramic processing method, the electrode coating and polarization of the piezoelectric ceramic piece can be realized in one step, and the processing procedure is saved. The processes of printing slurry, drying, sintering and infiltrating the electrode, chemically plating the electrode and the like are not needed, so that the problem of air pollution caused by a large amount of waste gas discharged in the traditional process is avoided, the pollution to the air can be reduced, and the piezoelectric ceramic which is convenient to process, energy-saving and environment-friendly is provided. Furthermore, the provided piezoelectric ceramic device also has good energy-saving and environment-friendly properties and low cost.
Drawings
FIG. 1A is a schematic illustration of the piezoelectric effect in the prior art;
FIG. 1B is a schematic diagram of the piezoelectric effect of the prior art;
FIG. 1C is a schematic diagram of the piezoelectric effect of the prior art;
FIG. 2 is a flow chart of a prior art piezoelectric ceramic processing method;
FIG. 3 is a schematic structural view of a piezoelectric ceramic according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method for processing a piezoelectric ceramic according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a piezoelectric ceramic according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a piezoelectric ceramic according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a piezoelectric ceramic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that references in the specification to "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not intended to refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Moreover, where certain terms are used throughout the description and following claims to refer to particular components or features, those skilled in the art will understand that manufacturers may refer to a component or feature by different names or terms. This specification and the claims that follow do not intend to distinguish between components or features that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. In addition, the term "connected" as used herein includes any direct and indirect electrical connection. Indirect electrical connection means include connection by other means.
Referring to fig. 3 to 6, in one embodiment of the present invention, there is provided a piezoelectric ceramic 100 including:
at least one piezoelectric ceramic piece 10, wherein the piezoelectric ceramic piece 10 is an electrodeless piezoelectric ceramic piece 10; namely, the piezoelectric ceramic sheet 10 is not coated with the electrode;
the seat tooling clamp 20 comprises at least two electric conductors 30 for clamping the piezoelectric ceramic plate 10, and the two electric conductors 30 are respectively provided with an electric connection point of an external power supply; the electric connection point is connected with a power supply; the seat tooling fixture 20 is used for clamping the piezoelectric ceramic piece 10, and is specifically realized by the electric conductors 30 arranged on the seat tooling fixture 20, the adjacent pair of electric conductors 30 form a pair of clamping jaws, a clamping space is formed between the pair of electric conductors 30, the distance between the optional pair of electric conductors 30 can be adjusted, and the seat tooling fixture is suitable for piezoelectric ceramic pieces 10 with different thicknesses, preferably, the electric conductors 30 are metal plates, and the metal plates have a conductive function. The electrical connection point of conductor 30 is shown as a "+" electrode or a "-" electrode.
When the two conductors 30 exert a clamping force on the piezoelectric ceramic piece 10, the electrical connection point is connected with high-voltage direct current, so that the piezoelectric ceramic piece 10 is coated with electrode electrodes and/or polarized. When the piezoelectric ceramic piece 10 is polarized, the "+" electrode or the "-" electrode is connected with a high voltage direct current, so that the piezoelectric ceramic piece 10 is applied with the electrode, and further, the polarization of the piezoelectric ceramic piece 10 can be realized due to continuous power supply, such as continuous connection of the high voltage direct current or the high voltage alternating current, while the electrode is applied. Thus, the application of the electrodes and polarization of the piezoelectric ceramic sheet 10 can be completed in one step. The selection of the high voltage direct current is set according to the output power of different piezoelectric ceramic 100 designs. The high voltage direct current generally has a voltage in the range of 35kv to 220 kv.
Referring to fig. 4, a flow chart of a processing method of the piezoelectric ceramic according to the embodiment of the present invention is shown, and after the cleaning step in the drawing is actually completed, the electrodeless piezoelectric ceramic plate 10 is obtained. As can be seen from the steps in the figure, compared with the prior art that the piezoelectric ceramic piece 10 is coated with the electrode, the processes of printing paste, drying, burning and infiltrating the electrode, chemically plating the electrode and the like are not needed. In this embodiment, electrodes are not applied to the two surfaces of the piezoelectric ceramic sheet 10 in a conventional manner, and the piezoelectric ceramic sheet 10 can be applied with the electrodes and polarized, which is convenient to operate. The method of firstly producing the piezoelectric ceramic 100 with the piezoelectric effect greatly reduces the cost and shortens the production period. In addition, the problem that in the electrode slurry used in the traditional process, more organic solvents exist, and a large amount of waste gas is inevitably discharged in the process of drying and burning the electrode to cause air pollution is avoided, so that the pollution to the atmosphere can be reduced.
Referring to fig. 3, in one embodiment of the present invention, a piezoelectric ceramic 100 includes a plurality of piezoelectric ceramic sheets 10; the seat tooling clamp 20 comprises a plurality of conductors 30 which are arranged in a laminated mode, and one piezoelectric ceramic piece 10 is clamped between every two conductors 30. The seat tooling fixture 20 is provided with the plurality of conductors 30 which are arranged in a stacked mode, and one piezoelectric ceramic piece 10 is clamped between every two adjacent conductors 30, so that the electrodes are applied to the plurality of piezoelectric ceramic pieces 10 at the same time, the electrode applying efficiency is improved, and the setting requirements of structures and power of different piezoelectric ceramics 100 are met.
In an embodiment of the present invention, two metal plates, i.e., two electrical conductors 30, are used to clamp the piezoelectric ceramic 100, and a high voltage direct current is applied to the two metal plates, so that a direct current electric field is formed at two ends of the piezoelectric ceramic 100, and the piezoelectric ceramic 100 can be polarized to generate a piezoelectric effect. The metal plate used in polarization is the seat tooling fixture 20, and the seat tooling fixture 20 can be used repeatedly all the time.
Referring to fig. 5 and 6, in one embodiment of the invention, a plurality of stacked electrical conductors 30 are connected in parallel; and a plurality of piezoelectric ceramic sheets 10 sandwiched between a plurality of laminated conductors 30 are connected in parallel to constitute a crystal stack 101. When each crystal stack 101 is subjected to external pressure, electric power can be output externally. Further, optionally, the piezoelectric ceramic 100 includes: a plurality of crystal stacks 101, the plurality of crystal stacks 101 are arranged in parallel, and the plurality of crystal stacks 101 are connected in parallel. Further, the plurality of crystal stacks 101 are arranged in parallel and connected in parallel to form a plurality of columns, and when the plurality of crystal stacks 101 with a large area are compressed, a larger power is output to generate a larger current, so that the piezoelectric ceramic 100 with the plurality of crystal stacks 101 can be applied to the application scene of a generator. The piezoelectric ceramic 100 including the plurality of crystal stacks 101 is buried in the ground, and a generator can generate electricity by using pressure applied by a pedestrian walking.
Referring to fig. 3 to 6, in one embodiment of the present invention, the thickness of each piezoceramic sheet 10 is equal or unequal or partially equal; the thickness of the piezoelectric ceramic sheets 10 in the piezoelectric ceramic 100 including the plurality of piezoelectric ceramic sheets 10 may be equal, different, or partially equal according to the design requirements of the piezoelectric ceramic 100 and the arrangement requirements of the piezoelectric ceramic device to which the piezoelectric ceramic sheet is applied. If 5 pieces of piezoceramic wafers 10 are included, the thickness of 3 of the wafers is the same, while the thickness of the other two wafers is different, thereby adjusting the difference in power output by the piezoceramic 100. The shape of the piezoelectric ceramic piece 10 includes a circle, a rectangle, a ring, a triangle or a trapezoid; to accommodate the design requirements of different devices having piezoelectric ceramic 100. The shape of the electrical conductor 30 is adapted to the electroceramic sheet. Alternatively, all of the conductors 30 are of equal thickness.
Therefore, in the present invention, the piezoelectric ceramic 100 can be polarized without applying electrodes on two surfaces of the piezoelectric ceramic 100, and the product setup firstly produces the piezoelectric ceramic 100 with piezoelectric effect, thereby greatly reducing the manufacturing cost of the piezoelectric ceramic 100. And the procedures of printing slurry, drying, sintering and infiltrating the electrode, chemically plating the electrode and the like are omitted, the production period is shortened, and the pollution to the atmosphere can be reduced.
In one embodiment of the present invention, there is provided a piezoelectric ceramic device 200 including the piezoelectric ceramic 100 according to any one of the above embodiments. The processing and structure of the piezoelectric ceramic 100 are described in the above embodiments, and are not described herein.
Optionally, the two adjacent piezoelectric ceramic pieces 10 are led out by taking the conductor 30 as an electrode; high-voltage alternating current is connected to the electrodes of the piezoelectric ceramic piece 10, and the two conductors 30 respectively have positive and negative electrodes. The piezoelectric ceramic device is an ultrasonic transducer or a generator. Specifically, referring to fig. 7, the ultrasonic transducer is a transducer for ultrasonic cleaning, the ultrasonic transducer is formed by fastening two piezoelectric ceramic plates 10 in parallel by bolts 71 through front and rear metal cover plates 77 and 72, and further has an insulating sleeve 76, and a copper sheet is used as an electrode to be led out between the two piezoelectric ceramic plates 10. In the structure of fig. 7, the electrodeless piezoceramic sheet 10 can completely replace the conventional electrode piezoceramic sheet 10. High frequency alternating current (generally tens of KHz) is applied to the two metal blocks to make the piezoelectric ceramic 100 generate stretching alternate deformation, thereby generating high frequency vibration to generate ultrasonic waves. The choice is made according to the design requirements of different devices having piezoelectric ceramic 100. As applied in ultrasonic transducers, the alternating current is a high frequency alternating current with a frequency of typically tens of KHz.
Further, the piezoelectric ceramic 100 includes: the piezoelectric ceramic 100 with the crystal stacks 101 is buried underground, and pressure applied by pedestrians when walking is utilized, because the crystal stacks 101 with large areas are compressed, larger power can be output to generate larger current, the generator can generate electricity, and the generator is a generator which saves environment and is environment-friendly.
The invention provides a piezoelectric ceramic, which comprises: the seat tool clamp comprises at least one piezoelectric ceramic piece and a seat tool clamp, wherein at least two conductors of the seat tool clamp are used for clamping the piezoelectric ceramic piece, and the two conductors are respectively provided with an electric connection point of an external power supply; the electric connection point is connected with a power supply; when the two electric conductors exert clamping force on the piezoelectric ceramic piece, the electric connection point is connected with high-voltage direct current, so that the piezoelectric ceramic piece is coated with electrodes and/or polarized. Therefore, the electrode is not required to be coated on the piezoelectric ceramic by adopting the traditional piezoelectric ceramic processing method, the electrode coating and polarization of the piezoelectric ceramic piece can be realized in one step, and the processing procedure is saved. The processes of printing slurry, drying, sintering and infiltrating the electrode, chemically plating the electrode and the like are not needed, so that the problem of air pollution caused by a large amount of waste gas discharged in the traditional process is avoided, the pollution to the air can be reduced, and the piezoelectric ceramic which is convenient to process, energy-saving and environment-friendly is provided. Furthermore, the provided piezoelectric ceramic device also has good energy-saving and environment-friendly properties and low cost.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A piezoelectric ceramic, comprising:
at least one piezoelectric ceramic plate is arranged on the base,
the seat tooling fixture comprises at least two conductors for clamping the piezoelectric ceramic plate, and the two conductors are respectively provided with an electric connection point of an external power supply; the electric connection point is connected with a power supply;
when the two electric conductors exert clamping force on the piezoelectric ceramic piece, the electric connection point is connected with high-voltage direct current, so that the piezoelectric ceramic piece is coated with electrodes and/or polarized.
2. The piezoelectric ceramic of claim 1, wherein the piezoelectric ceramic comprises a plurality of pieces of piezoelectric ceramic;
the seat tooling fixture comprises a plurality of conductors which are arranged in a stacked mode, and one piezoelectric ceramic piece is clamped between every two conductors.
3. The piezoelectric ceramic according to claim 2, wherein the plurality of stacked conductors are connected in parallel; and a plurality of piezoelectric ceramic plates clamped among the plurality of laminated conductors are connected in parallel to form a crystal stack.
4. The piezoelectric ceramic according to claim 3, comprising: the crystal stacking device comprises a plurality of crystal stacks, wherein the crystal stacks are arranged in parallel and are connected in parallel.
5. The piezoelectric ceramic of claim 2, wherein the thickness of each of the piezoelectric ceramic sheets is equal or unequal or partially equal;
the piezoelectric ceramic plate is round, rectangular, annular, triangular or trapezoidal;
the shape of the electric conductor is matched with the electric ceramic sheet.
6. The piezoelectric ceramic according to claim 2, wherein each of the conductive bodies has an equal thickness.
7. The piezoelectric ceramic of claim 1, wherein the piezoceramic sheet is an electrodeless piezoceramic sheet; the electric conductor is a metal plate.
8. A piezoelectric ceramic device comprising the piezoelectric ceramic according to any one of claims 1 to 7.
9. The piezoelectric ceramic device according to claim 8, wherein two adjacent piezoelectric ceramic pieces are led out through an electric conductor as an electrode; and high-voltage alternating current is connected to the electrodes of the piezoelectric ceramic plate.
10. The piezoceramic device according to claim 9, wherein the piezoceramic device is an ultrasonic transducer or an electrical generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044878.XA CN114389479A (en) | 2022-01-14 | 2022-01-14 | Piezoelectric ceramic and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044878.XA CN114389479A (en) | 2022-01-14 | 2022-01-14 | Piezoelectric ceramic and device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114389479A true CN114389479A (en) | 2022-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210044878.XA Pending CN114389479A (en) | 2022-01-14 | 2022-01-14 | Piezoelectric ceramic and device thereof |
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| Country | Link |
|---|---|
| CN (1) | CN114389479A (en) |
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2022
- 2022-01-14 CN CN202210044878.XA patent/CN114389479A/en active Pending
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