Glass powder slurry nanometer dispersion ball-milling process of high-performance ceramic circuit board

Abstract

The invention relates to the field of glass powder processing, and discloses a high-performance ceramic circuit board glass powder slurry nanometer dispersion ball-milling process, which comprises: S1, material preparation: preparing a glass powder coarse material, a solvent, a dispersant and an auxiliary agent according to preparation requirements; s2, pretreatment: pre-crushing the glass powder through a ball mill to remove coarse particles in the glass powder; s3, premixing: mixing the glass powder, the solvent, the dispersing agent and the auxiliary agent in proportion, and performing ultrasonic treatment on the mixture to realize primary dispersion; the glass powder slurry nano-dispersion ball-milling process of the high-performance ceramic circuit board can effectively solve the problems that in the prior art, the motion trail of materials in a ball mill is difficult to guarantee during grinding, so that coarse glass powder is subjected to different grinding forces in different areas, some large particles are possibly not fully ground, and the grinding efficiency is low. And part of small particles reach the required particle size, so that the particle size of the final glass powder is not uniform.

Description

[0001] The invention relates to the field of glass powder processing, and in particular to a nano-dispersed ball milling process for glass powder slurry of a high-performance ceramic circuit board. Background Art

[0002] When producing high-performance ceramic circuit boards, glass powder slurry is needed in the thick film metallization step. The thick film metallization technology uses the screen printing method to apply the metal slurry containing glass powder slurry to the surface of the ceramic substrate, and through drying and high-temperature sintering, the metal layer is firmly attached to the ceramic. The glass powder slurry plays a role in determining the adhesion of the slurry to the ceramic substrate, lowering the sintering temperature, reducing production costs and substrate thermal stress.

[0003] The particle size of glass powder will significantly affect the quality of glass powder slurry. Glass powder with larger particle size has greater gravity. It is more affected by gravity in the slurry and is prone to sedimentation, resulting in stratification, which affects the uniformity and stability of the slurry. Therefore, when configuring glass powder slurry, there are high requirements for the particle size of glass powder. In industrial production, glass powder is usually ground by a ball mill, but the following problems are prone to occur during the grinding process:

[0004] During grinding, it is difficult to ensure the movement trajectory of the grinding media and the coarse glass powder in the ball mill, which makes the coarse glass powder unevenly distributed in the ball mill, resulting in different grinding forces on the coarse glass powder in different areas, and the initial shape and size of the coarse glass powder are different. During the grinding process, some larger particles may not be fully ground, while some smaller particles have reached the required particle size, resulting in uneven particle size of the final glass powder. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a nano-dispersion ball milling process for glass powder slurry of high-performance ceramic circuit boards, which can effectively solve the problem in the prior art that it is difficult to ensure the movement trajectory of the grinding medium and the glass powder coarse material in the ball mill during grinding, which will cause the glass powder coarse material to be subjected to different grinding forces in different areas, and the initial shape and size of the glass powder coarse material are different. During the grinding process, some larger particles may not be fully ground, while some smaller particles have reached the required particle size, resulting in uneven particle size of the final glass powder.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A nano-dispersed ball milling process for glass powder slurry of a high-performance ceramic circuit board, comprising:

[0008] S1. Material preparation: prepare glass powder coarse material, solvent, dispersant and additives according to preparation requirements.

[0009] S2. Pretreatment: Pre-crushing the glass powder by a ball mill, grinding the coarse glass powder to nanometer level, and removing the coarse particles and hard agglomerates therein.

[0010] S3, premixing: glass powder, solvent, dispersant and additive are mixed in proportion, and the mixture is subjected to ultrasonic treatment to achieve preliminary dispersion.

[0011] S4. Nano-dispersion: The mixture is sent into a sand mill, and the particles in the mixture are further refined and dispersed through high-speed stirring of the sand mill.

[0012] S5. Filtration: After nano-dispersion is completed, the slurry is filtered using a micron-sized filter to remove incompletely dispersed large particles and ball milling debris.

[0013] S6. Detection: Use a laser particle size analyzer to analyze the particle size distribution and shape of the glass powder particles.

[0014] Among them, the ball mill in S2 includes a rotating part, and the rotating part includes a base. Two bases are arranged on the left and right, and a grinding bin is connected to the two bases for rotation together. The left end of the grinding bin is connected to a driving mechanism.

[0015] The conveying part includes two isolation plates, which are fixedly connected on the left and right sides of the abrasive bin, and the filter holes on the left isolation plate are larger than the filter holes on the right isolation plate. A material moving mechanism for conveying coarse glass powder from right to left is connected in the abrasive bin and between the two isolation plates.

[0016] The abrasive bin adopts an inclined design with the left side higher and the right side lower. The left end of the abrasive bin adopts a conical funnel design with a pre-crushing mechanism arranged therein, and the right end of the abrasive bin is connected with a discharge mechanism.

[0017] Furthermore, the pre-crushing mechanism includes a No. 1 limit frame, the left end of which is rotatably connected to the left isolation plate, the left end of which is fixedly connected to the left base via a No. 1 connecting frame, and a crushing assembly is installed together in the No. 1 limit frame and the abrasive bin.

[0018] Furthermore, the crushing assembly includes a fixed cone, which is fixedly connected to the right end of the No. 1 limit frame, and the outer wall of the fixed cone is provided with a plurality of grooves evenly arranged along the circumferential direction, and the inner side wall of the abrasive bin is fixedly connected with a crushing wall matching the fixed cone, and the inner side wall of the crushing wall is fixedly connected with a plurality of protrusions matching the grooves evenly arranged along the circumferential direction.

[0019] Furthermore, the driving mechanism includes an outer gear ring, which is fixedly connected to the right end of the abrasive bin through a gear frame, and a transmission gear is meshed on the outer side of the outer gear ring, and the transmission gear is fixedly connected to the driving shaft of the driving motor.

[0020] Furthermore, the material moving mechanism includes a mounting frame, and a plurality of mounting frames are evenly and fixedly connected along the circumference of the abrasive bin, and the mounting frames are parallel to each other. The observation direction is perpendicular to the axis of the abrasive bin and pointing to the abrasive bin, and the counterclockwise direction of the circumference of the side wall of the abrasive bin is defined. At this viewing angle, the left end of each mounting frame is at a relatively forward position compared to the right end in the counterclockwise direction of the side wall of the abrasive bin. A material guide plate is slidably connected to the mounting frame, and a material guide assembly is connected to the outer side of the material guide plate.

[0021] Furthermore, the material guide assembly includes an annular track, which is arranged on the outside of the abrasive bin, is eccentrically arranged between the annular track and the abrasive bin, and the center of the annular track is at a higher position in the vertical direction than the center of the abrasive bin. A connecting piece is fixedly connected to the material guide plate, and the connecting piece is slidably connected in the annular track.

[0022] Furthermore, the discharge mechanism includes a spiral conveying channel, and the spiral conveying channel is fixedly connected to the right end of the abrasive bin, and a feeding assembly is connected inside the abrasive bin and on the right isolation plate.

[0023] Furthermore, the feeding assembly includes a No. 2 limit frame, the left end of the No. 2 limit frame is rotatably connected to the right isolation plate, the right end of the No. 2 limit frame is fixedly connected to the right base through a No. 2 connecting frame, and a discharge pipe is fixedly connected to the No. 2 limit frame through a mounting frame, and the left and right ends of the discharge pipe are respectively rotatably connected to the right isolation plate and the spiral conveying channel, a material drop groove is provided on the side wall of the discharge pipe and at an upper position, and a plurality of material moving plates matching the discharge pipe are evenly and fixedly connected to the inner wall of the abrasive bin along the circumferential direction.

[0024] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0025] The grinding bin of the present invention adopts an inclined design with the left side higher and the right side lower. After the coarse glass powder is introduced into the grinding bin from the left side, the coarse glass powder will automatically slide to the right to the pre-crushing mechanism under the action of its own gravity, and the coarse glass powder with a larger volume will be pre-crushed by the fixed cone and the crushing wall in the pre-crushing mechanism, so that the size of the coarse glass powder entering the grinding bin is relatively uniform, and the grinding medium does not need to spend too much energy to crush large particles of materials, and can focus more on further grinding and refining the materials, thereby improving the overall working efficiency of the ball mill; the side wall of the grinding bin is also evenly provided with a plurality of guide plates, and the guide plates are The surface can support the coarse glass powder to rise as the abrasive bin rotates, avoiding insufficient collision due to insufficient rising height. At the same time, since the left end of each guide plate is relatively forward compared to the right end in the counterclockwise direction of the side wall of the abrasive bin, the right end of the guide plate below the axis of the abrasive bin and close to the rear side is higher than the left end. When the coarse glass powder slides to the right and accumulates at the left end of the right isolation plate, it will first be collected by the guide plate, and then slide to the right. As the guide plate rises and contracts, it will continue to fall along the edge to various parts of the abrasive bin, thereby avoiding the accumulation of coarse glass powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 The present invention is a flow chart of a nano-dispersion ball milling process for glass powder slurry of a high-performance ceramic circuit board.

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the ball mill in the present invention.

[0029] Figure 3 For the present invention Figure 2 Front view of.

[0030] Figure 4 It is an exploded view of the base, grinding material bin and pre-crushing mechanism in the ball mill of the present invention.

[0031] Figure 5 It is a cross-sectional view of a part of the structure of the ball mill of the present invention.

[0032] Figure 6 For the present invention Figure 5 A partial enlarged view of point A in the middle.

[0033] Figure 7It is a schematic plan view of the annular track and the abrasive bin of the present invention.

[0034] Figure 8 It is an exploded view of the base, abrasive bin and discharge mechanism of the present invention.

[0035] The numbers in the figure represent respectively: 1. rotating part; 11. base; 12. abrasive bin; 13. driving mechanism; 131. outer gear ring; 132. transmission gear; 2. conveying part; 21. isolation plate; 22. material moving mechanism; 221. mounting frame; 222. material guide plate; 223. material guide assembly; 2231. circular track; 2232. connecting piece; 23. pre-crushing mechanism; 231. No. 1 limiting frame; 232. No. 1 connecting frame; 233. crushing assembly; 2331. fixed cone; 2332. crushing wall; 24. discharging mechanism; 241. spiral conveying channel; 242. feeding assembly; 2421. No. 2 limiting frame; 2422. No. 2 connecting frame; 2423. discharging pipe; 2424. material moving plate. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] The present invention will be further described below in conjunction with the embodiments.

[0038] Example:

[0039] See also Figure 1-Figure 7 , a nano-dispersed ball milling process for glass powder slurry of high-performance ceramic circuit boards, comprising:

[0040] S1. Material preparation: prepare glass powder coarse material, solvent, dispersant and additives according to preparation requirements.

[0041] S2. Pretreatment: Pre-crushing the glass powder by a ball mill, grinding the coarse glass powder to nanometer level, and removing the coarse particles and hard agglomerates therein.

[0042] S3, premixing: glass powder, solvent, dispersant and additive are mixed in proportion, and the mixture is subjected to ultrasonic treatment to achieve preliminary dispersion.

[0043] S4. Nano-dispersion: The mixture is sent into a sand mill, and the particles in the mixture are further refined and dispersed through high-speed stirring of the sand mill.

[0044] S5. Filtration: After nano-dispersion is completed, the slurry is filtered using a micron-sized filter to remove incompletely dispersed large particles and ball milling debris.

[0045] S6. Detection: Use a laser particle size analyzer to analyze the particle size distribution and shape of the glass powder particles.

[0046] The ball mill in S2 includes a rotating part 1, and the rotating part 1 includes a base 11. Two bases 11 are arranged on the left and right. A grinding bin 12 is connected to the two bases 11 for rotation together, and a driving mechanism 13 is connected to the left end of the grinding bin 12.

[0047] The conveying part 2 includes an isolation plate 21, which is composed of an anti-collision frame and a filter plate. The anti-collision frame is used to prevent the grinding medium from directly hitting the filter plate, and the filter plate is used to screen the coarse glass powder. There are two isolation plates 21 fixedly connected on the left and right sides of the abrasive bin 12, and the filter holes on the left isolation plate 21 are larger than the filter holes on the right isolation plate 21. A material moving mechanism 22 for conveying the coarse glass powder from right to left is connected in the abrasive bin 12 and between the isolation plates 21.

[0048] The abrasive bin 12 is designed to be inclined with the left side higher than the right side. The left end of the abrasive bin 12 is designed to be conical funnel-shaped and a pre-crushing mechanism 23 is connected thereto. The right end of the abrasive bin 12 is connected to a discharge mechanism 24 .

[0049] The driving mechanism 13 includes an outer gear ring 131, which is fixedly connected to the right end of the abrasive bin 12 through a gear frame. A transmission gear 132 is meshed on the outer side of the outer gear ring 131, and the transmission gear 132 is fixedly connected to the driving shaft of the driving motor.

[0050] During specific implementation, the driving motor rotates, driving the transmission gear 132 to rotate counterclockwise synchronously, thereby driving the outer gear ring 131 to rotate clockwise. The rotation of the outer gear ring 131 drives the abrasive bin 12 to rotate synchronously through the gear frame. During processing, after the coarse glass powder is passed into the abrasive bin 12 from the left end, the pre-crushing mechanism 23 is driven by the abrasive bin 12 to pre-crush the coarse glass powder passed therein, thereby crushing the mixed glass particles with larger particle sizes into smaller particles, so that they can pass through the isolation plate 21 on the left side and enter the interior of the abrasive bin 12. The particle size of the coarse glass powder after pre-crushing is relatively uniform. Compared with direct grinding, the grinding time of the grinding medium can be reduced to a certain extent, thereby improving the grinding efficiency.

[0051] Since the abrasive bin 12 adopts an inclined design with the left side higher and the right side lower, the pre-crushed coarse glass powder will automatically slide to the right along with the grinding medium under the action of its own gravity after passing through the left isolation plate 21. At the same time, since the abrasive bin 12 continues to rotate counterclockwise driven by the outer gear ring 131 and the gear rack, centrifugal force is generated to cause the coarse glass powder to move centrifugally along its inner wall. Since the particle size of the glass powder needs to be ground into a smaller form, after a period of grinding, the friction and agglomeration force between the particles will increase due to the glass powder particle size being too fine. At this time, the conventional ball mill will be unable to fully throw and lift the coarse glass powder, resulting in the coarse glass powder being unable to fully collide and rub against the grinding medium and the inner wall of the abrasive bin 12, thereby causing the grinding effect to deteriorate and reducing production efficiency.

[0052] To avoid the above situation, a material moving mechanism 22 is set in the abrasive bin 12. When the abrasive bin 12 rotates, the coarse glass powder material falling on the bottom of the abrasive bin 12 is moved upward to a certain height by the material moving mechanism 22, thereby avoiding the occurrence of insufficient collision caused by insufficient rising height of the coarse glass powder material. Since the abrasive bin 12 is tilted with the left side higher and the right side lower, the coarse glass powder material will automatically slide to the right during the process of being continuously thrown upward, and accumulate on the left side of the right isolation plate 21. The coarse glass powder material with a particle size that meets the size can pass through the right isolation plate 21 and enter the discharge mechanism 24, and is transported to the outside by the discharge mechanism 24. The coarse glass powder material and grinding medium that cannot pass through the right isolation plate 21 are transported to the left by the discharge mechanism 24, and continue to perform centrifugal motion with the rotation of the abrasive bin 12 until they are ground into a particle size that can pass through the right isolation plate 21.

[0053] The pre-crushing mechanism 23 includes a No. 1 limiting frame 231, the left end of which is rotatably connected to the left isolation plate 21, and the left end of which is fixedly connected to the left base 11 via a No. 1 connecting frame 232. A crushing assembly 233 is installed in the No. 1 limiting frame 231 and the abrasive bin 12.

[0054] The crushing assembly 233 includes a fixed cone 2331, which is fixedly connected to the right end of the No. 1 limit frame 231. The outer wall of the fixed cone 2331 is provided with a plurality of grooves evenly arranged along the circumferential direction. The inner side wall of the abrasive bin 12 is fixedly connected with a crushing wall 2332 matched with the fixed cone 2331. The inner side wall of the crushing wall 2332 is evenly fixedly connected with a plurality of protrusions matched with the grooves along the circumferential direction.

[0055] During specific implementation, the fixed cone 2331 is fixedly connected to the left base 11 through the No. 1 limiting frame 231 and the No. 1 connecting frame 232, and is always in a stationary state, while the crushing wall 2332 continuously rotates with the abrasive bin 12, so that relative rotation occurs between the two. In the process of passing the coarse glass powder into the abrasive bin 12 from the left, since the abrasive bin 12 is tilted in a state of being higher on the left and lower on the right, the coarse glass powder automatically slides to the right under the action of its own gravity, and needs to pass through the gap between the fixed cone 2331 and the crushing wall 2332. In this process, with the relative rotation between the fixed cone 2331 and the crushing wall 2332, the coarse glass powder with a larger volume will be crushed through the grooves and protrusions, and crushed into smaller sizes that can pass through the left isolation plate 21, thereby achieving pre-crushing. The coarse glass powder after pre-crushing is smaller and more uniform in size, and the grinding medium does not need to spend too much energy to crush large particles of material, and can focus more on further grinding and refining the material, thereby improving the overall working efficiency of the ball mill and increasing the output per unit time.

[0056] The material moving mechanism 22 includes a mounting frame 221, and a plurality of mounting frames 221 are evenly and fixedly connected to the abrasive bin 12 along the circumferential direction. The mounting frames 221 are parallel to each other, and the direction perpendicular to the axis of the abrasive bin 12 and pointing to the abrasive bin 12 is used as the observation direction, and the counterclockwise direction of the circumference of the side wall of the abrasive bin 12 is defined. At this viewing angle, the left end of each mounting frame 221 is at a relatively forward position compared to the right end in the counterclockwise direction of the side wall of the abrasive bin 12, and a material guide plate 222 is slidably connected to the mounting frame 221, and a material guide assembly 223 is connected to the outer side of the material guide plate 222.

[0057] The guide assembly 223 includes an annular track 2231, which is fixedly arranged on the outside of the abrasive bin 12 through a base. The annular track 2231 is eccentrically arranged with respect to the abrasive bin 12, and the center of the annular track 2231 is located at a higher position in the vertical direction than the center of the abrasive bin 12 (see Figure 7 ), a connecting piece 2232 is fixedly connected to the guide plate 222, and the connecting piece 2232 is slidably connected in the annular track 2231.

[0058] The discharge mechanism 24 includes a spiral conveying channel 241 , which is fixedly connected to the right end of the abrasive bin 12 . A feeding assembly 242 is connected inside the bin and on the right isolation plate 21 .

[0059] The feeding assembly 242 includes a No. 2 limiting frame 2421, the left end of the No. 2 limiting frame 2421 is rotatably connected to the right isolation plate 21, the right end of the No. 2 limiting frame 2421 is fixedly connected to the right base 11 through a No. 2 connecting frame 2422, and a discharge pipe 2423 is fixedly connected to the No. 2 limiting frame 2421 through a mounting frame 221, and the left and right ends of the discharge pipe 2423 are respectively rotatably connected to the right isolation plate 21 and the spiral conveying channel 241, a material drop groove is provided on the side wall of the discharge pipe 2423 and at an upper position, and a plurality of moving plates 2424 cooperating with the discharge pipe 2423 are evenly and fixedly connected to the inner wall of the abrasive bin 12 along the circumferential direction.

[0060] In specific implementation, when the pre-crushed coarse glass powder material is located between the two isolation plates 21, on the one hand, it will slide to the right due to the height difference between the left and right sides of the ball mill bin, and on the other hand, it will be continuously brought to a high place and thrown downward with the rotation of the grinding bin 12. During the clockwise rotation of the grinding bin 12, it will also drive each guide plate 222 to rotate clockwise synchronously. When the guide plate 222 rotates clockwise, it will play a supporting role, driving the coarse glass powder material at the bottom to rise synchronously.

[0061] At the same time, since the center of the circular track 2231 is at a higher position in the vertical direction than the center of the abrasive bin 12, as the connecting piece 2232 slides in the circular track 2231, when the guide plate 222 rotates clockwise from bottom to top with the abrasive bin 12, the distance between the circular track 2231 and the abrasive bin 12 increases, the guide plate 222 is driven to slide to the outside of the abrasive bin 12 through the connecting piece 2232, thereby shortening the length of the guide plate 222 in the abrasive bin 12. The coarse glass powder and grinding media on the outer layer and near the edge of the guide plate 222 will fall due to the loss of bottom support, and the coarse glass powder and grinding media on the inner layer and near the inner wall of the abrasive bin 12 supported by the guide plate 222 will not fall until the guide plate 222 rises to a height above the axis of the abrasive bin 12. This progressive falling method has two advantages:

[0062] First, the falling height of the coarse glass powder and grinding media located in the inner layer and close to the inner wall of the abrasive bin 12 can be guaranteed, so that this part of the coarse glass powder can fully collide and rub with the grinding media and the inner wall of the abrasive bin 12; second, the coarse glass powder and grinding media located in the outer layer and close to the edge will fall first, and will be collected by the guide plate 222 that is subsequently moved here, so that they will be accumulated in the inner layer, and then fall when falling, thereby enhancing the fluidity of the coarse glass powder to avoid uneven grinding.

[0063] In the process of being continuously thrown down, the coarse glass powder will also slide to the right due to the inclination of the abrasive bin 12. The coarse glass powder with the particle size that meets the size can pass through the right isolation plate 21 and accumulate at the right end of the abrasive bin 12. As the abrasive bin 12 rotates clockwise, it will drive the shifting plate 2424 to rotate synchronously, and then the coarse glass powder with the particle size that meets the size will be supported to a high place by the shifting plate 2424. Since the discharge pipe 2423 is in a stationary state under the action of the No. 2 limit frame 2421 and the No. 2 connecting frame 2422, the material drop chute thereon is always facing upward. When the shifting plate 2424 rotates to its height above the axis height of the abrasive bin 12, the glass powder with the particle size that meets the size on it will automatically fall into the discharge pipe 2423 along the material drop chute. Since the left end of the shifting plate 2424 is higher than the right end, the glass powder that falls into it will automatically slide to the right into the spiral conveying channel 241, and finally fall into the external container along the spiral conveying channel 241.

[0064] The coarse glass powder that accumulates on the left side of the right isolation plate 21 and cannot pass through is collected again as the guide plate 222 rotates. At the same time, since the left end of each guide plate 222 is relatively forward in the counterclockwise direction of the side wall of the abrasive bin 12 compared to the right end, the right end of the guide plate 222 that is below the axis of the abrasive bin 12 and close to the rear side is higher than the left end. Therefore, the coarse glass powder collected thereon will automatically slide to the left and continue to fall along the edge as the guide plate 222 rises and contracts. In this way, the accumulation of coarse glass powder is prevented and the uniformity of grinding is further improved.

[0065] It is worth noting that the above-mentioned method of ball milling glass powder has the following advantages:

[0066] Advantage 1: In this embodiment, the abrasive bin 12 adopts an inclined design with the left side higher and the right side lower. After the coarse glass powder is introduced into the abrasive bin 12 from the left side, the coarse glass powder will automatically slide to the right under the action of its own gravity. Compared with the conventional horizontal setting, the coarse glass powder will not accumulate at the feed inlet. The side wall of the abrasive bin 12 is also evenly provided with a plurality of guide plates 222. The guide plates 222 can support the coarse glass powder to rise in the process of rotating with the abrasive bin 12, so as to avoid the occurrence of insufficient collision due to insufficient rising height. At the same time, since the left end of each guide plate 222 is relatively forward in the counterclockwise direction of the side wall of the abrasive bin 12 compared to the right end, the right end of the guide plate 222 at a height below the axis of the abrasive bin 12 and close to the rear side is higher than the left end. When the coarse glass powder slides to the right and accumulates at the left end of the right isolation plate 21, it will first be collected by the guide plate 222, and then slide to the right. As the guide plate 222 rises and contracts, it will continue to fall along the edge to various parts of the abrasive bin 12, thereby avoiding the accumulation of coarse glass powder on the right side of the abrasive bin 12.

[0067] Advantage 2. In this embodiment, a fixed cone 2331 and a crushing wall 2332 are provided at the left end of the abrasive bin 12, and relative rotation occurs between the two. After the coarse glass powder is introduced into the abrasive bin 12 from the left side, since the abrasive bin 12 is tilted in a state of being higher on the left and lower on the right, the coarse glass powder automatically slides to the right under the action of its own gravity, and the coarse glass powder with a larger volume is crushed by the grooves and protrusions, and crushed into smaller sizes that can pass through the left isolation plate 21, thereby achieving pre-crushing. The coarse glass powder after pre-crushing is smaller and more uniform in size, and the grinding medium does not need to expend energy to crush large particles, and can focus more on further grinding and refining the material, thereby improving the overall working efficiency of the ball mill and increasing the output per unit time.

[0068] Advantage 3. In this embodiment, the outer portion of each guide plate 222 is slidably connected to the annular track 2231 through a connecting piece 2232, and the annular track 2231 is eccentrically arranged with the abrasive bin 12. Therefore, when the guide plate 222 rotates with the abrasive bin 12, it will slide in the mounting frame 221 under the action of the connecting piece 2232. When the guide plate 222 slides outward along the mounting frame 221, the coarse glass powder supported on it will fall along the edge. On the one hand, this falling method can ensure the falling height of the coarse glass powder and grinding medium located in the inner layer and close to the inner wall of the abrasive bin 12, so that this part of the coarse glass powder can fully collide and rub with the grinding medium and the inner wall of the abrasive bin 12. On the other hand, the coarse glass powder and grinding medium located in the outer layer and close to the edge will fall first, and will be collected by the guide plate 222 moved thereafter, so that they will be accumulated in the inner layer and fall later when falling, thereby enhancing the fluidity of the coarse glass powder to avoid uneven grinding.

[0069] Advantage 4. In the embodiment, when the coarse glass powder material slides to the right and falls to the right isolation plate 21, the coarse glass powder material with the particle size that meets the size can pass through the right isolation plate 21 and accumulate at the right end of the abrasive bin 12. As the abrasive bin 12 rotates clockwise, the material moving plate 2424 will be driven to rotate synchronously, and then the coarse glass powder material with the particle size that meets the size will be supported to a high place by the material moving plate 2424. When the material moving plate 2424 rotates to a height higher than the axis height of the abrasive bin 12, the coarse glass powder material with the particle size that meets the size will automatically fall into the discharge pipe 2423 along the material dropping trough. Since the left end of the material moving plate 2424 is higher than the right end, the glass powder that falls into it will automatically slide to the right into the spiral conveying channel 241, and finally fall into the external container along the spiral conveying channel 241, so that the processed glass powder can be output from the abrasive bin 12 in time to avoid excessive grinding.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nano-dispersed ball milling process for glass powder slurry of high-performance ceramic circuit boards, characterized in that: include: S1. Material preparation: prepare glass powder coarse material, solvent, dispersant and additives according to preparation requirements; S2. Pretreatment: pre-crushing the glass powder by ball mill to remove coarse particles and hard agglomerates; S3, premixing: mixing the glass powder, solvent, dispersant and additive according to a certain proportion, and subjecting the mixture to ultrasonic treatment to achieve preliminary dispersion; S4, nano-dispersion: the mixture is sent to a sand mill, and the particles in the mixture are further refined and dispersed through high-speed stirring of the sand mill; S5. Filtration: After nanodispersion is completed, the slurry is filtered using a micron-sized filter to remove incompletely dispersed large particles and ball milling debris; S6. Detection: Use a laser particle size analyzer to analyze the particle size distribution and shape of the glass powder particles; The ball mill in S2 comprises a rotating part (1), the rotating part (1) comprises a base (11), two bases (11) are arranged on the left and right, a grinding bin (12) is connected to the two bases (11) for co-rotation, and a driving mechanism (13) is connected to the left end of the grinding bin (12); A conveying section (2), the conveying section (2) comprising an isolation plate (21), two isolation plates (21) being fixedly connected to the left and right sides of the abrasive bin (12), the filter hole diameter on the left isolation plate (21) being larger than the filter hole diameter on the right isolation plate (21), and a material transfer mechanism (22) for conveying coarse glass powder from right to left is connected to the abrasive bin (12) and located between the isolation plates (21); The abrasive bin (12) is designed to be inclined with the left side higher and the right side lower. The left end of the abrasive bin (12) is designed to be conical funnel-shaped and provided with a pre-crushing mechanism (23). The right end of the abrasive bin (12) is connected with a discharge mechanism (24).

2. The nano-dispersion ball milling process of glass powder slurry for high-performance ceramic circuit boards according to claim 1 is characterized by: The pre-crushing mechanism (23) comprises a first limiting frame (231), the left end of which is rotatably connected to the left isolation plate (21), the left end of which is fixedly connected to the left base (11) via a first connecting frame (232), and a crushing assembly (233) is installed in the first limiting frame (231) and the abrasive bin (12).

3. The nano-dispersion ball milling process of glass powder slurry for high-performance ceramic circuit boards according to claim 2, characterized in that: The crushing assembly (233) includes a fixed cone (2331), the fixed cone (2331) is fixedly connected to the right end of the first limiting frame (231), the outer wall of the fixed cone (2331) is provided with a plurality of grooves uniformly arranged along the circumferential direction, the inner wall of the abrasive bin (12) is fixedly connected with a crushing wall (2332) matching with the fixed cone (2331), and the inner wall of the crushing wall (2332) is fixedly connected with a plurality of protrusions uniformly arranged along the circumferential direction matching with the grooves.

4. The nano-dispersion ball milling process of glass powder slurry for high-performance ceramic circuit boards according to claim 1, characterized in that: The driving mechanism (13) comprises an outer gear ring (131), the outer gear ring (131) is fixedly connected to the right end of the abrasive bin (12) via a gear rack, a transmission gear (132) is meshed on the outer side of the outer gear ring (131), and the transmission gear (132) is fixedly connected to the driving shaft of the driving motor.

5. The nano-dispersion ball milling process of glass powder slurry for high-performance ceramic circuit boards according to claim 1, characterized in that: The material moving mechanism (22) comprises a mounting frame (221), and a plurality of mounting frames (221) are evenly and fixedly connected to the abrasive bin (12) along the circumferential direction, and the mounting frames (221) are parallel to each other. The direction perpendicular to the axis of the abrasive bin (12) and pointing to the abrasive bin (12) is used as the observation direction, and the counterclockwise direction of the circumference of the side wall of the abrasive bin (12) is defined. At this viewing angle, the left end of each mounting frame (221) is located relatively forward in the counterclockwise direction of the side wall of the abrasive bin (12) compared to the right end. A material guide plate (222) is slidably connected to the mounting frame (221), and a material guide assembly (223) is connected to the outer side of the material guide plate (222).

6. The nano-dispersion ball milling process of glass powder slurry for high-performance ceramic circuit boards according to claim 5, characterized in that: The material guide assembly (223) comprises an annular track (2231), wherein the annular track (2231) is arranged outside the abrasive bin (12), the annular track (2231) and the abrasive bin (12) are eccentrically arranged, and the center of the annular track (2231) is located at a higher position in the vertical direction than the center of the abrasive bin (12), and a connecting piece (2232) is fixedly connected to the material guide plate (222), and the connecting piece (2232) is slidably connected in the annular track (2231).

7. The nano-dispersion ball milling process of glass powder slurry for high-performance ceramic circuit boards according to claim 1, characterized in that: The material discharging mechanism (24) comprises a spiral conveying channel (241), wherein the spiral conveying channel (241) is fixedly connected to the right end of the abrasive bin (12), and a material feeding assembly (242) is connected inside the abrasive bin (12) and located on the right isolation plate (21).

8. The nano-dispersion ball milling process of glass powder slurry for high-performance ceramic circuit boards according to claim 7, characterized in that: The feeding assembly (242) comprises a No. 2 limiting frame (2421), the left end of the No. 2 limiting frame (2421) is rotatably connected to the right isolation plate (21), the right end of the No. 2 limiting frame (2421) is fixedly connected to the right base (11) via a No. 2 connecting frame (2422), a discharge pipe (2423) is fixedly connected to the No. 2 limiting frame (2421) via a mounting frame (221), the left and right ends of the discharge pipe (2423) are respectively rotatably connected to the right isolation plate (21) and the spiral conveying channel (241), a material drop groove is provided on the side wall of the discharge pipe (2423) and at an upper position, and a plurality of material shifting plates (2424) matching the discharge pipe (2423) are evenly and fixedly connected to the inner wall of the abrasive bin (12) along the circumferential direction.

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