Manufacturing method of piezoelectric ceramic spherical crown flanging electrode

Abstract

The invention belongs to the technical field of piezoelectric ceramics, and particularly relates to a manufacturing method of a piezoelectric ceramic spherical crown flanging electrode. Comprising the following steps: uniformly coating silver paste on a spherical crown surface of a piezoelectric ceramic spherical crown needing to be printed with a flanging electrode by using a coating method or a spraying method, and drying and cooling; drawing a required flanging electrode pattern according to a proportion by using drawing software, and importing the required flanging electrode pattern into a laser marking machine control computer; using a gasket to pad one end of the spherical crown of the to-be-manufactured flanging electrode; adjusting the distance between a laser transmitter and a ceramic chip through the effect of forging a flanging electrode sample, adjusting the laser transmitting power to a proper parameter value, and then operating a program to print a required flanging electrode pattern; and putting the ceramic wafer printed with the flanging electrode pattern into a silver firing furnace for silver firing to obtain a final silver electrode flanging pattern. The manufacturing method is limited by the radian size of the piezoelectric ceramic spherical crown and the size of the pattern gap at the turnup, and is suitable for manufacturing piezoelectric ceramic spherical crown turnup electrodes of various specifications and sizes.

Description

Technical Field

[0001] The invention belongs to the technical field of piezoelectric ceramics, and in particular relates to a method for manufacturing a piezoelectric ceramic spherical crown flanging electrode. Background Art

[0002] Piezoelectric ceramics are information functional ceramic materials that can convert mechanical energy and electrical energy into each other. They have been widely used in medical imaging, acoustic sensors, acoustic transducers, ultrasonic motors, fish detectors, etc. Piezoelectric ceramic components need to be electroded before they can be used. For piezoelectric ceramic spherical crowns, the electrode is usually applied by brush coating or spray gun spraying.

[0003] When piezoelectric ceramics are used as medical probes, the components are usually made into a spherical crown shape. In order to facilitate welding and gluing, it is often necessary to flange the positive or negative electrode of the component so that the positive and negative electrodes of the component are on the same arc surface at the same time.

[0004] In order to print the electrode shape at the flange, the commonly used methods are screen printing and sticker printing. Among them, the screen printing method is prone to uneven printing and inconsistent pattern gap size. The sticker printing method has high requirements for the operation of the sticker and cannot be used for the flange electrode of smaller size. Therefore, in view of the above situation, the present invention provides a method for making a piezoelectric ceramic ball crown flange electrode to solve the above technical defects. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art. The present invention provides a method for manufacturing a piezoelectric ceramic spherical cap flanged electrode. The present invention adopts a method of first coating or spraying the electrode of the spherical cap and drying it, and then adopts a laser burning method to burn off the electrode in the area where the printed electrode is not required to manufacture the flanged electrode of the piezoelectric ceramic spherical cap.

[0006] In order to solve the above technical problems, the present invention provides a method for manufacturing a piezoelectric ceramic spherical crown flange electrode, comprising the following steps:

[0007] Step 1: Use a coating method or a spraying method to evenly coat the surface of the piezoelectric ceramic crown that needs to be printed with flange electrodes with silver paste, and dry and cool it;

[0008] Step 2: Use CAD drawing software to draw the required flanging electrode pattern in proportion and import it into the laser marking machine control computer;

[0009] Step 3: Use a gasket to raise one end of the spherical crown where the flanging electrode is to be made;

[0010] Step 4: By making the flanging electrode sample, adjust the distance between the laser emitter and the ceramic sheet, and the laser emission power to the appropriate parameter value, and then run the program to print out the required flanging electrode pattern;

[0011] Step 5: Place the ceramic sheet with the printed flanging electrode pattern into a silver-burning furnace to burn silver to obtain the final silver electrode flanging pattern.

[0012] Preferably, the coating method or spraying method in step 1 is specifically a brush coating method or a spray gun spraying method.

[0013] Preferably, the step 1 specifically includes:

[0014] (1) Using a brush coating method or a spray gun spraying method, silver paste is evenly applied to one of the curved surfaces of the piezoelectric ceramic spherical cap on which the flanged electrode is to be printed;

[0015] (2) putting the spherical crown coated with the curved silver paste into an oven for drying, taking it out after the silver paste is dried and cooling it to room temperature;

[0016] (3) using the method of step (1) above to evenly coat the other curved surface of the cooled spherical cap with silver paste;

[0017] (4) Repeat the above step (2) to dry the coated silver paste.

[0018] Preferably, in step 2, the flanging electrode pattern is drawn at a ratio of 1:1.

[0019] Preferably, in step 3, one end of the spherical crown is padded to make it close to a horizontal state.

[0020] Preferably, the manufacturing method can be applied to ceramic ball crowns with larger curvatures, and can print patterns with a graphic gap of less than 2 mm at the flange.

[0021] Preferably, the manufacturing method can be applied to the manufacturing of piezoelectric ceramic spherical crown flanging electrodes of various specifications and sizes.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides a novel method for manufacturing a piezoelectric ceramic ball crown flanged electrode. The method is used to manufacture a flanged electrode for a piezoelectric ceramic ball crown, and the edges of the patterns at the flanged electrode are relatively neat and regular, the sizes are uniform, the pattern gaps are consistent, the operation method is simple, and it is not limited by the curvature size of the piezoelectric ceramic ball crown and the size of the pattern gap at the flange, and is suitable for the manufacture of piezoelectric ceramic ball crown flanged electrodes of various specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1The present invention provides a flow chart of a method for manufacturing a piezoelectric ceramic spherical crown flanging electrode. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0026] like Figure 1 As shown, the embodiment of the present invention provides a novel method for manufacturing a piezoelectric ceramic spherical crown flange electrode, and the specific operation includes the following steps:

[0027] (1) Use a brush coating method or a spray gun coating method to evenly coat one curved surface of a piezoelectric ceramic spherical cap on which a flange electrode is to be printed with silver paste.

[0028] (2) Place the spherical crown coated with curved silver paste in an oven for drying. After the silver paste is dried, take it out and cool it to room temperature.

[0029] (3) Use the method of step (1) to evenly coat the other curved surface of the cooled spherical crown with silver paste.

[0030] (4) Repeat step (2) to dry the applied silver paste.

[0031] (5) Use CAD drawing software to draw the required flanging electrode pattern at a 1:1 ratio and import it into the laser marking machine control computer.

[0032] (6) Use a gasket to raise one end of the spherical crown of the electrode to be flanged so that it is close to a horizontal state.

[0033] (7) By measuring the effect of producing the flanged electrode sample, the distance between the laser emitter and the ceramic sheet and the laser emission power are adjusted to appropriate parameter values, and then the program is run to print out the desired flanged electrode pattern.

[0034] (8) The ceramic sheet with the printed flanging electrode pattern is placed in a silver-burning furnace to burn silver to obtain the final silver electrode flanging pattern.

[0035] The present invention uses a laser marking method to print the required flanging electrode pattern onto the piezoelectric ceramic ball crown, which solves the problems that the printing method is difficult to apply to ceramic ball crowns with larger curvatures, cannot print patterns with smaller gaps (less than 2 mm), silver paste accumulates at the edge of the pattern after printing, and the printing spacing is inconsistent due to the curvature of the ceramic sheet, resulting in inconsistent pattern gaps. In addition, the printing method is relatively complicated to operate, and requires a high level of proficiency of the operator. It is generally printed manually, and the quality of the printed pattern also varies. However, by first coating the entire surface of the ball crown with silver paste, and after the silver paste is dried, the required flanging electrode pattern is printed onto the ceramic sheet by a laser marking method, a high-quality flanging pattern with consistent gaps, neat pattern edges and no burrs can be obtained. This method is not limited by the curvature of the ball crown and the size of the pattern gap, and the operation is relatively simple, with low requirements for the operator. The pattern printing quality is controlled by the laser marking equipment, and the pattern consistency after printing is good. Moreover, compared with the method of printing the flanging pattern by laser after burning the silver paste, the advantage of this method of printing by laser after the silver paste is that the laser power required for printing is much lower, so the damage to the ceramic piece itself is less, and it is not easy to burn through the ceramic piece. If the number of products to be printed is large, the corresponding positioning tooling can also be designed for batch printing.

[0036] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A method for manufacturing a piezoelectric ceramic spherical crown flange electrode, characterized in that: The steps include: Step 1: Use a coating method or a spraying method to evenly coat the surface of the piezoelectric ceramic crown that needs to be printed with flange electrodes with silver paste, and dry and cool it; Step 2: Use CAD drawing software to draw the required flanging electrode pattern in proportion and import it into the laser marking machine control computer; Step 3: Use a gasket to raise one end of the spherical crown where the flanging electrode is to be made; Step 4: By making the flanging electrode sample, adjust the distance between the laser emitter and the ceramic sheet, and the laser emission power to the appropriate parameter value, and then run the program to print out the required flanging electrode pattern; Step 5: Place the ceramic sheet with the printed flanging electrode pattern into a silver-burning furnace to burn silver to obtain the final silver electrode flanging pattern.

2. The method for manufacturing a piezoelectric ceramic spherical cap flanging electrode according to claim 1, characterized in that: The coating method or spraying method in step 1 is specifically a brush coating method or a spray gun spraying method.

3. The method for manufacturing a piezoelectric ceramic spherical cap flange electrode according to claim 1, characterized in that: The step 1 specifically includes: (1) Using a brush coating method or a spray gun spraying method, silver paste is evenly applied to one of the curved surfaces of the piezoelectric ceramic spherical cap on which the flanged electrode is to be printed; (2) putting the spherical crown coated with the curved silver paste into an oven for drying, taking it out after the silver paste is dried and cooling it to room temperature; (3) using the method of step (1) above to evenly coat the other curved surface of the cooled spherical cap with silver paste; (4) Repeat the above step (2) to dry the coated silver paste.

4. The method for manufacturing a piezoelectric ceramic spherical cap flanging electrode according to claim 1, characterized in that: In step 2, the flanging electrode pattern is drawn at a ratio of 1:

1.

5. The method for manufacturing a piezoelectric ceramic spherical cap flanging electrode according to claim 1, characterized in that: In step 3, one end of the ball crown is padded to make it close to a horizontal state.

6. A method for manufacturing a piezoelectric ceramic spherical cap flange electrode according to any one of claims 1 to 5, characterized in that: The manufacturing method is applicable to ceramic ball crowns with large curvatures, and can print patterns with a gap of less than 2 mm at the flange.

7. A method for manufacturing a piezoelectric ceramic spherical cap flange electrode according to any one of claims 1 to 5, characterized in that: The manufacturing method can be applied to the manufacturing of piezoelectric ceramic spherical crown flanging electrodes of various specifications and sizes.

Images