Device and method for processing ceramic wet blank through ultrasonic vibration

Abstract

The invention discloses a device and a method for processing a ceramic wet blank through ultrasonic vibration, and relates to the technical field of ceramics. The characteristic that a wet blank formed through spontaneous gel curing is partially liquefied under the action of shear stress is combined with an ultrasonic vibration technology, so that fluidity adjustment and shape finishing of a local wet blank material are achieved, the machining efficiency and precision are remarkably improved, the limitation of traditional mechanical cutting is broken through, and the product quality is improved. High-precision and low-damage wet blank processing is achieved, and the method is particularly suitable for production of ceramic products with complex shapes or high performance.

Description

Technical Field

[0001] The invention relates to the technical field of ceramics, and in particular to a device and a method for ultrasonic vibration processing of ceramic wet blanks. Background Art

[0002] The value of ceramic products is jointly determined by their material properties, shape complexity and surface quality, but a balance between high performance and low cost must be taken into account. In the manufacture of ceramic products, a variety of molding and processing methods can be selected according to factors such as the size, complexity, production quantity and cost of the shape. In the traditional molding process, ceramic blanks are usually processed and trimmed by mechanical grinding. The processing objects are the processing of the blanks after molding, the pre-burned bodies and the sintered bodies. However, the strength of the molded blanks is low, and mechanical grinding is prone to cause defects on the surface and inside of the blanks. In particular, the manufacture of complex shapes and high-performance ceramics is difficult to meet the requirements of high precision and low damage; the pre-burned bodies, especially the sintered ceramics, are difficult to mechanically grind due to their high strength, high hardness, and inherent brittleness. For example, the Chinese invention patent CN107746276A discloses a method for preparing a zirconia ceramic mold for hot bending of mobile phone glass. The zirconia ceramic mold blank is finely processed by CNC, and is equipped with an electroplated diamond grinding head and a tool for precise size processing and mirror polishing to obtain a finished zirconia ceramic mold for hot bending of mobile phone glass. However, when processing ceramic materials, ceramics have high hardness but high brittleness, and are prone to edge collapse and fragmentation during processing. Chinese invention patent CN119501638A discloses a composite material cutting device and method, which cuts thin-walled shells, performs follow-up support through a follow-up support mechanism during the cutting process, adopts stiffness finite element analysis technology and an online servo control adjustment method for the support force, and the tool uses ultrasonic vibration to assist in processing. However, during the cutting process, the tool alternately cuts the softer plastic aluminum matrix and the high-hardness brittle silicon carbide particles, which has a greater impact on the tool, and the use of ceramic tools is prone to cutting edge cracking. There are problems in the processing of thin-walled shell parts, such as difficulty in ensuring processing accuracy and the material is prone to cracks, resulting in the scrapping of parts. Chinese invention patent CN119381320A discloses a wafer processing method and a wafer processing device, which are used to process wafers. The wafer is transmitted to the grinding module by a transmission component. After grinding and thinning, it is then passed through the transmission component and clamped by a robot and transported to the next station. However, a large amount of debris, slag and other particles will be generated at this time, which will have an adverse effect on the wafer quality and subsequent operations. Chinese invention patent CN111941291A discloses a method and equipment for ultrasonic processing of ceramic parts. Ultrasonic processing of ceramic parts can achieve thin-walled alumina ceramic parts or micro-hole processing. Usually, boron carbide and other paste abrasives are selected. The vibration frequency is 20-40kHz and the amplitude is 10-50μm. Material removal is achieved through high-frequency impact. However, when using this processing equipment, there are problems such as inconvenient installation and cumbersome operation. During processing, the processing effect is not good and the processing waste is inconvenient to clean. There are also problems such as low processing efficiency and poor processing surface quality.

[0003] So far, there are few reports on the processing of ceramic green blanks. Green blanks have lower strength and higher fluidity potential. If their material properties can be properly utilized, the processing technology of ceramic products may be innovated.

[0004] In recent years, spontaneous gel curing technology is a new type of advanced ceramic forming method that has received widespread attention. Studies have found that the wet blank formed by spontaneous gel curing can be converted back into a fluid slurry under the action of shear stress, that is, it has the characteristic of force liquefaction. This characteristic provides a new theoretical basis and technical possibility for wet blank processing. Experimental verification has found that by applying appropriate shear stress, the wet blank material can be locally liquefied, thereby achieving precision processing of the wet blank. This processing method is not traditional mechanical grinding, but a method based on shear stress to induce wet blank liquefaction and remove material. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a device and method for ultrasonic vibration processing of ceramic wet blanks. The processing method based on local liquefaction breaks through the limitations of traditional mechanical cutting and realizes high-precision, low-damage wet blank processing. It is particularly suitable for the production of complex-shaped or high-performance ceramic products. Compared with traditional mechanical forming methods, the present invention significantly simplifies the processing process, reduces the occurrence of forming defects, and provides a new, efficient and reliable processing method for various ceramic materials.

[0006] The technical solution of the present invention is: On the one hand, the present invention provides an apparatus for ultrasonic vibration processing of ceramic green blanks, including a fixed platform, the green blanks are fixedly placed on the fixed platform, an ultrasonic vibration device is arranged above the fixed platform, and the ultrasonic vibration device is installed on an xyz moving device.

[0007] Preferably, the fixing platform is a bench vise.

[0008] Preferably, the xyz moving device is assembled from linear guide rails, which can enable the ultrasonic vibration device to move along the x, y and z directions on the wet blank.

[0009] On the other hand, the present invention provides a method for ultrasonically vibrating a ceramic green blank using the above-mentioned device for ultrasonically vibrating a ceramic green blank, comprising the following steps: S1 preliminarily shapes the ceramic green body into a gel state so that it has a predetermined shape and size; S2 applies ultrasonic vibration to the target processing area of ​​the wet blank by means of an ultrasonic vibration device to induce local shear stress, so that the wet blank material in the target processing area is liquefied and fluidity is restored; S3, according to the processing requirements, utilizing the liquefaction of the wet blank material in the target processing area to remove the wet blank material in a designated area in the target processing area or to achieve connection between two wet blanks; S4 performs subsequent drying and sintering treatments on the processed wet blank to finally obtain a ceramic product.

[0010] Preferably, in step S1, the ceramic green body is an oxide ceramic green body, a nitride ceramic green body, a carbide ceramic green body or a complex ceramic green body.

[0011] Preferably, in step S1, the ceramic wet blank is obtained by injecting a ceramic slurry prepared from water, a water-soluble butene polymer and ceramic powder into a molding mold and spontaneously gelling and curing in the air.

[0012] Preferably, the water-soluble cis-butylene polymer is poly[(isobutylene-alt-maleic acid ammonium salt)-co-(isobutylene-alt-maleic anhydride)].

[0013] Preferably, in step S3, the wet blank material in the designated area of ​​the target processing area is removed by negative pressure suction, so as to form a predetermined shape in the target processing area.

[0014] Preferably, in step S4, the drying temperature is 20-80°C, the relative humidity is 10-90%RH, and the drying time is 1-8 days; the sintering is divided into two steps, the first step is to heat the temperature in the air at a rate of 1-10°C / min to 300-1000°C and then keep it warm for 2-10h, and the second step is to heat the temperature in the air at a rate of 1-10°C / min to 1200-1800°C and then keep it warm for 2-30h.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The method of ultrasonic vibration processing of ceramic wet blanks of the present invention utilizes the characteristic that the wet blank formed by spontaneous gel curing is partially liquefied under the action of shear stress, and is combined with ultrasonic vibration technology to significantly improve processing efficiency and precision. Specifically, the ultrasonic vibration device can provide high-frequency ultrasonic vibration in the vertical direction, so that the local shear stress of the wet blank material in the target processing area can be accurately controlled, thereby realizing the fluidity adjustment and shape trimming of the local wet blank material. In addition, by providing high-frequency ultrasonic vibration in the vertical direction by the ultrasonic vibration device, the size and distribution of the local shear stress of the wet blank can be accurately controlled, thereby ensuring the accuracy and stability of the processing process. The embodiments of the present invention show that the method can not only be used for the removal of local materials of the wet blank, such as wet blank surface shaping, grooving or drilling, but also is suitable for ceramic surface processing and the manufacture of ceramic products with complex shapes. Its processing accuracy can reach hundreds of microns, and at the same time, different wet blanks can be efficiently connected through the liquefied fresh section. This innovative processing method effectively solves a series of problems in the traditional processing of ceramic blanks and provides a new solution for advanced ceramic manufacturing.

[0016] 2. The processing method of the present invention significantly improves the efficiency and accuracy of ceramic wet blank processing, avoids the problems caused by traditional dry blank grinding, and reduces processing defects. It is based on the principle of liquefaction of the stressed part of the wet blank by spontaneous gel solidification, and provides a new solution for ceramic blank processing, especially in the field of complex shapes and high-performance ceramics. In addition, compared with traditional processing methods, the present invention can achieve seamless connection between wet blanks without compromising material properties, further expanding the design and manufacturing capabilities of ceramic products, and providing important support for the future development of ceramic manufacturing technology.

[0017] 3. The present invention utilizes the partial liquefaction of the ceramic blank under the action of shear stress to restore the fluidity of the material, thereby breaking through the limitations of traditional mechanical grinding. Through high-frequency ultrasound, the surface and internal defects of the wet blank are significantly reduced, ensuring processing accuracy and surface quality. The processing method of the present invention is applicable to a variety of ceramic materials such as oxide ceramics, nitride ceramics, carbide ceramics or complex ceramics, and supports the processing needs of complex-shaped, high-performance ceramic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the device for ultrasonic vibration processing of ceramic wet blanks of the present invention.

[0019] Figure 2 It is an ultra-depth-of-field microscope image of the blank after grooved in Example 1 of the present invention, wherein the left image is a top view of the blank, and the right image is a front view of the blank.

[0020] Figure 3 These are ultra-depth-of-field microscope images of the blank after the holes are opened in Example 2 of the present invention, wherein the left image is a top view of the blank after the holes are opened, and the right image is a side view of the blank after the holes are opened.

[0021] Figure 4 The ceramic green body before (left) and after (right) trimming of Example 3 of the present invention.

[0022] Figure 5 The three-dimensional scanning image (left) and SEM image (right) of the surface of the blank before (top) and after (bottom) trimming of Example 3 of the present invention are shown.

[0023] Figure 6 1 is a hemispherical concave surface before (left) and after (right) processing in Example 4 of the present invention.

[0024] Figure 7 These are two ceramic products after the contact surfaces are joined in Example 5 of the present invention.

[0025] Figure 8 The figures are the ceramic wet blanks processed to produce the letters SIC (left) and CAS (right) in Example 6 of the present invention.

[0026] In the figure, 1, fixed platform; 2, wet blank; 3, ultrasonic vibration device; 301, ultrasonic converter; 302, ultrasonic generator; 303, ultrasonic horn; 4, xyz moving device. DETAILED DESCRIPTION

[0027] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0028] The ultrasonic vibration processing method for processing ceramic green blanks in the following embodiments uses an ultrasonic vibration processing device for processing ceramic green blanks. Figure 1 As shown, it includes a fixed platform 1, a wet blank 2 is fixedly placed on the fixed platform 1, an ultrasonic vibration device 3 is arranged above the fixed platform 1, and the ultrasonic vibration device 3 is installed on the xyz moving device 4. Among them, the fixed platform 1 can be a bench vise; the ultrasonic vibration device 3 includes an ultrasonic converter 301, the ultrasonic converter 301 is connected to an ultrasonic generator 302, and the bottom of the ultrasonic generator 302 is connected to an ultrasonic horn 303; the xyz moving device 4 is assembled by linear guide rails, which can make the ultrasonic vibration device 3 move on the wet blank 2 along the x, y, and z directions.

[0029] In the following examples, poly[(isobutylene-alt-maleic acid ammonium salt)-co-(isobutylene-alt-maleic anhydride)] is ISOBAM 600AF and ISOBAM 104.

[0030] Example 1 The method of ultrasonic vibration processing of ceramic green blank 2 in this embodiment comprises the following steps: S1 uses high-purity alumina powder (purity> 99.99%) with a median particle size of 500 nm as raw material, ultrapure water as solvent, 0.2wt.% ISOBAM 104 and 0.3wt.% ISOBAM 600AF as gelling agent and dispersant, and is evenly dispersed by stirring and grinding to control the solid content of the ceramic slurry at 56vol.%; the ceramic slurry is injected into a molding mold, and spontaneously gelled and solidified in the air to obtain a 7cm×4cm×2cm rectangular wet blank 2; S2 applies ultrasonic vibration at the target groove of the wet blank 2 and in a direction perpendicular to the upper surface of the wet blank 2 through the ultrasonic vibration device 3, and the ultrasonic vibration frequency is 40kHz to induce local shear stress, so that the wet blank 2 material in the target processing area is liquefied and the fluidity is restored; The S3 control system drives the ultrasonic vibration device 3 to move at the target groove of the wet blank 2 through the xyz moving device 4 according to the preset size of the groove to be processed. During the movement, the liquefied wet blank 2 material is sucked away by the negative pressure suction device; the ultrasonic vibration device 3 grooves the surface of the wet blank 2 along the predetermined path, and finally realizes the processing of a groove width of 370μm, a groove depth of 5000μm, and a groove length of 5000μm (such as Figure 2 shown); S4 puts the grooved wet blank 2 into a constant temperature and humidity chamber at 25°C and 80%RH for drying for 3 days, then heats the dried blank to 800°C at a rate of 10°C / min and keeps it warm for 2 hours for debinding treatment, then puts it into a muffle furnace and heats it to 1550°C at a rate of 6°C / min and keeps it warm for 6 hours for sintering, so as to convert the wet blank 2 into a high-density ceramic product.

[0031] Depend on Figure 2 It can be seen that the ceramic product processed by the method of this embodiment has a uniform and consistent processed surface, without any local abnormalities such as wrinkling, peeling or particle accumulation, and no obvious discontinuity or mutation area; and the surface contour is smooth, and no obvious cracks, holes or other processing defects are observed.

[0032] Example 2 The method of ultrasonic vibration processing of ceramic green blank 2 in this embodiment comprises the following steps: S1 uses high-purity alumina powder (purity> 99.99%) with a median particle size of 200nm as raw material, ultrapure water as solvent, 0.1wt.% ISOBAM 104 and 0.5wt.% ISOBAM 600AF as gelling agent and dispersant, and is evenly dispersed by stirring and grinding to control the solid content of the ceramic slurry at 56vol.%; the ceramic slurry is injected into a molding mold, and spontaneously gelled and solidified in the air to obtain a Φ4cm×2cm cylindrical wet blank 2; S2 applies ultrasonic vibration at the target opening of the wet blank 2 and in a direction perpendicular to the upper surface of the wet blank 2 through the ultrasonic vibration device 3, and the ultrasonic vibration frequency is 40kHz to induce local shear stress, so that the wet blank 2 material in the target processing area is liquefied and the fluidity is restored; The S3 control system drives the ultrasonic vibration device 3 to move at the target hole of the wet blank 2 through the xyz moving device 4 according to the preset hole diameter and depth. During the movement, the liquefied wet blank 2 material is sucked away by the negative pressure suction device; the ultrasonic vibration device 3 makes holes on the surface of the wet blank 2 along the predetermined path, and finally realizes the processing of a hole diameter of 500μm and a hole depth of 4000μm (such as Figure 3 shown); S4 puts the wet blank 2 after opening into a constant temperature and humidity chamber at 35°C and 85%RH for drying for 2 days, then heats the dried blank to 600°C at a rate of 5°C / min and keeps it warm for 5 hours for debinding treatment, then puts it into a muffle furnace and heats it to 1400°C at a rate of 1°C / min and keeps it warm for 4 hours for sintering, so as to convert the wet blank 2 into a high-density ceramic product.

[0033] Depend on Figure 3 It can be seen that the ceramic product processed by the method of this embodiment has smooth edges in the punched area without obvious cracking or peeling; the hole wall is smooth and the structure is complete, no signs of crack extension are observed around it, the overall morphology is uniform, and no abnormal texture or material peeling is observed, indicating that the processing process is stable and no obvious defects are introduced.

[0034] Example 3 The method of ultrasonic vibration processing of ceramic green blank 2 in this embodiment comprises the following steps: S1 uses high-purity magnesium aluminum spinel powder (purity> 99.99%) with a median particle size of 80nm as raw material, ultrapure water as solvent, 0.1wt.% ISOBAM 104 and 1wt.% ISOBAM 600AF as gelling agent and dispersant, and disperses them evenly through stirring mill to control the solid content of ceramic slurry at 52vol.%; the ceramic slurry is injected into a molding mold, and spontaneously gelled and solidified in the air to obtain a Φ3cm×1.5cm cylindrical wet blank 2; S2 applies ultrasonic vibration on the entire upper surface of the wet blank 2 and in a direction perpendicular to the upper surface of the wet blank 2 through the ultrasonic vibration device 3, and the ultrasonic vibration frequency is 40kHz, so as to induce local shear stress, so that the material on the upper surface of the wet blank 2 is liquefied and the fluidity is restored; The S3 control system drives the ultrasonic vibration device 3 to move on the upper surface of the wet blank 2 through the xyz moving device 4 according to the size of the upper surface of the wet blank 2. During the movement, the liquefied wet blank 2 material is sucked away by the negative pressure suction device, and finally the upper surface of the wet blank 2 is trimmed from uneven to uniform and flawless (such as Figure 4 shown); S4 puts the trimmed wet blank 2 into a constant temperature and humidity chamber at 20°C and 90%RH for 8 days, then heats the dried blank to 1000°C at a rate of 10°C / min and keeps it warm for 8 hours for debinding treatment, then puts it into a muffle furnace and heats it to 1200°C at a rate of 2°C / min and keeps it warm for 15 hours for sintering, so as to convert the wet blank 2 into a high-density ceramic product.

[0035] Depend on Figure 4It can be seen that the ceramic product trimmed by the method of this embodiment has a uniform surface without local depressions, microcracks or particle aggregation. The measured values ​​of surface roughness (Sa, Sz, Sq) are low, indicating that ultrasonic surface processing effectively reduces the microscopic unevenness and improves the surface quality. Figure 5 From the SEM photos, it can be seen that the ceramic surface is dense and uniform, without obvious microcracks, holes or abnormal particle accumulation, the particles are well combined, and the structure is clear and uniform. In summary, combined with white light interference surface three-dimensional reconstruction and SEM analysis, the surface of the ceramic product prepared in this embodiment is uniform, dense and has no visible defects, which verifies the effectiveness of the optimized process and the stability of the preparation quality.

[0036] Example 4 The method of ultrasonic vibration processing of ceramic green blank 2 in this embodiment comprises the following steps: S1 uses high-purity magnesium aluminum spinel powder (purity> 99.99%) with a median particle size of 50nm as raw material, ultrapure water as solvent, 0.1wt.% ISOBAM 104 and 1.2wt.% ISOBAM 600AF as gelling agent and dispersant, and disperses them evenly through stirring mill to control the solid content of ceramic slurry at 42vol.%; the prepared ceramic slurry is injected into a molding mold, and spontaneously gelled and solidified in the air to obtain a Φ4cm×2cm cylindrical wet blank 2; S2 applies ultrasonic vibration on the upper surface of the wet blank 2 and in a direction perpendicular to the upper surface of the wet blank 2 through the ultrasonic vibration device 3, and the ultrasonic vibration frequency is 40kHz, so as to induce local shear stress, so that the material on the upper surface of the wet blank 2 is liquefied and the fluidity is restored; The S3 control system drives the ultrasonic vibration device 3 to move on the upper surface of the wet blank 2 through the xyz moving device 4 according to the preset size of the hemispherical concave surface to be processed. During the movement, the liquefied wet blank 2 material is sucked away by the negative pressure suction device; the ultrasonic vibration device 3 performs concave processing on the surface of the wet blank 2 along the predetermined path, and finally realizes the processing of a hemispherical concave surface of Φ1.6 cm (such as Figure 6 shown); S4 puts the processed wet blank 2 into a constant temperature and humidity chamber at 80°C and 10%RH to dry for 1 day, then heats the dried blank to 300°C at a rate of 1°C / min and keeps it warm for 6 hours for debinding treatment, then puts it into a muffle furnace and heats it to 1800°C at a rate of 8°C / min and keeps it warm for 6 hours for sintering, so as to convert the wet blank 2 into a high-density ceramic product.

[0037] Depend on Figure 6 It can be seen that the ceramic product trimmed by the method of this embodiment has a smooth surface, no obvious cracks, defects or other irregular defects, good surface flatness and a stable overall structure.

[0038] Example 5 The method of ultrasonic vibration processing of ceramic green blank 2 in this embodiment comprises the following steps: S1 uses high-purity yttrium oxide powder (purity> 99.9%) with a median particle size of 800nm ​​as raw material, ultrapure water as solvent, 0.2wt.% ISOBAM 104 and 0.5wt.% ISOBAM 600AF as gelling agent and dispersant, and disperses them evenly through stirring mill to control the solid content of ceramic slurry at 42vol.%; the prepared ceramic slurry is injected into a molding mold, and spontaneously gelled and solidified in the air to obtain two 2cm×1cm×1cm rectangular wet blanks 2; S2: butting the contact surfaces of the two wet blanks 2 together, applying ultrasonic vibration to the contact surfaces of the two wet blanks 2 through an ultrasonic vibration device 3, with an ultrasonic vibration frequency of 40 kHz, so as to induce local shear stress, so that the materials on the contact surfaces of the two wet blanks 2 are liquefied and fluidity is restored; The S3 control system controls the xyz moving device 4 to drive the ultrasonic vibration device 3 to move on the contact surface of the two wet blanks 2. The materials on the contact surface of the two wet blanks 2 are liquefied to form an effective combination, and finally a seamless connection between the two wet blanks 2 is achieved (such as Figure 7 shown); S4 puts the processed wet blank 2 into a constant temperature and humidity chamber at 40°C and 70%RH for 3 days, then heats the dried blank to 800°C at a rate of 8°C / min and keeps it warm for 10 hours for debinding treatment, then puts it into a muffle furnace and heats it to 1600°C at a rate of 2°C / min and keeps it warm for 20 hours for sintering, so as to convert the wet blank 2 into a high-density ceramic product.

[0039] Depend on Figure 7 It can be seen that the two ceramic products processed by the method of this embodiment are tightly fitted at the connection interface, without obvious gaps, interface stratification or uneven bonding; and there is no visible sign of crack or microcrack expansion in the connection area, the interface transition is uniform, and no brittle failure characteristics (such as defects such as peeling, stratification or holes) are observed.

[0040] Example 6 The method of ultrasonic vibration processing of ceramic green blank 2 in this embodiment comprises the following steps: S1 uses high-purity alumina powder (purity> 99.99%) with a median particle size of 200 nm as raw material, ultrapure water as solvent, 0.1wt.% ISOBAM 104 and 0.5wt.% ISOBAM 600AF as gelling agent and dispersant, and is dispersed evenly by stirring and grinding to control the solid content of the ceramic slurry at 56vol.%; the prepared ceramic slurry is injected into a molding mold, and spontaneously gelled and solidified in the air to obtain a 10cm×6cm×3cm rectangular wet blank 2; S2 applies ultrasonic vibration in the target processing area of ​​the wet blank 2 and in a direction perpendicular to the upper surface of the wet blank 2 through the ultrasonic vibration device 3, and the ultrasonic vibration frequency is 40kHz, so as to induce local shear stress, so that the material of the wet blank 2 in the target processing area is liquefied and the fluidity is restored; The S3 control system drives the ultrasonic vibration device 3 to move in the target processing area of ​​the wet blank 2 through the xyz moving device 4 according to the preset size of the letters to be processed. During the movement, the liquefied wet blank 2 material is sucked away by the negative pressure suction device; the ultrasonic vibration device 3 processes the surface of the wet blank 2 along the predetermined path, and finally realizes the processing of the letters SIC and CAS on the surface of the wet blank 2 (such as Figure 8 shown); S4 puts the processed wet blank 2 into a constant temperature and humidity chamber at 40°C and 85%RH for 2 days, then heats the dried blank to 700°C at a rate of 10°C / min and keeps it warm for 2 hours for debinding treatment, then puts it into a muffle furnace and heats it to 1500°C at a rate of 8°C / min and keeps it warm for 2 hours for sintering, so as to convert the wet blank 2 into a high-density ceramic product.

[0041] Depend on Figure 8 It can be seen that the method of this embodiment can be used to trim a complex shape on the ceramic green blank 2. The appearance of the dried and sintered ceramic product was inspected by using an optical microscope and the naked eye to observe the sample surface. There were no visible cracks, warping or obvious defects; the surface was uniform, the color was consistent, and there was no abnormal discoloration. This shows that the ultrasonic vibration processing method of this embodiment effectively realizes the preparation of ceramic products with complex shapes and ensures the integrity and reliability of the final ceramic.

[0042] The method of ultrasonic vibration processing of ceramic wet blanks 2 of the present invention significantly improves the efficiency and accuracy of ceramic wet blanks 2 processing, avoids the problems caused by traditional dry blank grinding processing, and reduces processing defects. It is based on the principle of spontaneous gel solidification of the stressed part of the wet blank 2, providing a new solution for ceramic blank processing, especially showing significant advantages in the field of complex shapes and high-performance ceramics. In addition, compared with traditional processing methods, the present invention can achieve seamless connection between wet blanks 2 without damaging material properties, further expanding the design and manufacturing capabilities of ceramic products, and providing important support for the future development of ceramic manufacturing technology.

Claims

1. A device for ultrasonic vibration processing of ceramic green blanks, characterized in that: It comprises a fixed platform (1), a wet blank (2) is fixedly placed on the fixed platform (1), an ultrasonic vibration device (3) is arranged above the fixed platform (1), and the ultrasonic vibration device (3) is installed on an xyz moving device (4).

2. The device for ultrasonic vibration processing of ceramic green blanks according to claim 1, characterized in that: The fixed platform (1) is a bench vise.

3. The device for ultrasonic vibration processing of ceramic green blanks according to claim 1, characterized in that: The xyz moving device (4) is assembled from linear guide rails and can enable the ultrasonic vibration device (3) to move along the x, y, and z directions on the wet blank (2).

4. A method for ultrasonically vibrating a ceramic green blank (2) using the device for ultrasonically vibrating a ceramic green blank according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1 preliminarily shapes the ceramic green body (2) into a gel state so that it has a predetermined shape and size; S2 applies ultrasonic vibration to the target processing area of ​​the wet blank (2) through an ultrasonic vibration device (3) to induce local shear stress, so that the material of the wet blank (2) in the target processing area is liquefied and restores fluidity; S3, according to the processing requirements, utilizing the liquefaction of the wet blank (2) material in the target processing area to remove the wet blank (2) material in a designated area in the target processing area or to achieve connection between two wet blanks (2); S4 performs subsequent drying and sintering on the processed wet blank (2) to finally obtain a ceramic product.

5. The method for ultrasonic vibration processing of ceramic green blanks according to claim 4, characterized in that: In step S1, the ceramic wet blank (2) is an oxide ceramic wet blank (2), a nitride ceramic wet blank (2), a carbide ceramic wet blank (2) or a complex ceramic wet blank (2).

6. The method for ultrasonic vibration processing of ceramic green blanks according to claim 4, characterized in that: In step S1, a ceramic wet blank (2) is prepared by injecting a ceramic slurry made of water, a water-soluble butene polymer and ceramic powder into a molding mold and undergoing spontaneous gelation and solidification in the air to obtain the ceramic wet blank.

7. The method for ultrasonic vibration processing of ceramic green blanks according to claim 6, characterized in that: The water-soluble cis-butylene polymer is poly[(isobutylene-alt-maleic acid ammonium salt)-co-(isobutylene-alt-maleic anhydride)].

8. The method for ultrasonic vibration processing of ceramic green blanks according to claim 4, characterized in that: In step S3, negative pressure suction is used to remove the wet blank (2) material in a designated area of ​​the target processing area, thereby forming a predetermined shape in the target processing area.

9. The method for ultrasonic vibration processing of ceramic green blanks according to claim 4, characterized in that: In step S4, the drying temperature is 20-80°C, the relative humidity is 10-90%RH, and the drying time is 1-8 days; the sintering is divided into two steps, the first step is to heat the temperature in the air at a rate of 1-10°C / min to 300-1000°C and then keep it warm for 2-10h, and the second step is to heat the temperature in the air at a rate of 1-10°C / min to 1200-1800°C and then keep it warm for 2-30h.

Images