Aluminum nitride powder sintering furnace

Abstract

The utility model discloses aluminum nitride powder sintering furnace relates to powder sintering technical field. The utility model discloses a furnace body, and its characterized in still includes powder scatters subassembly, and powder scatters subassembly includes transfer chamber, and the fixed connection between transfer chamber and furnace body, and the surface intercommunication of transfer chamber is provided with feeding hopper, and the side fixed connection of feeding hopper has motor, and the rotation is connected with the shaft in the feeding hopper and is passed in, and the fixed connection of push -off plate has in the shaft circumferential surface, and the fixed connection between motor output and the shaft, and the sliding connection of U type board has in transfer chamber, and the side fixed connection of U type board has sliding sleeve, and the sliding fit between sliding sleeve and transfer chamber, and sliding sleeve all with setting a plurality of ceramic rod, the utility model discloses through the rotation of conveying board to the aluminum nitride powder conveying of while, can drive multiple ceramic rod reciprocating movement in transfer chamber to the powder agglomerate in the furnace body can be scattered, and further can improve the quality after the aluminum nitride powder sintering.

Description

Technical Field

[0001] This utility model relates to the field of powder sintering technology, and in particular to an aluminum nitride powder sintering furnace. Background Technology

[0002] The core function of the aluminum nitride powder sintering furnace is not to sinter it into a dense body, but rather to optimize the performance of the powder material through a dynamic heat treatment process under inert gas protection. Surface tension is utilized to induce spheroidization of irregularly shaped particles, thereby improving its flowability and filling density. The final product is still a dispersed powder, but its sphericity, purity, and sintering activity are significantly improved, providing an ideal high-quality raw material for the subsequent preparation of high-performance thermally conductive ceramic substrates or composite materials. When using an existing aluminum nitride sintering furnace to sinter powder, the material is poured in from the hopper of the device during feeding. By setting a movable gate at the feeding position, the feeding and discharging of the powder is controlled. After the powder enters the furnace, inert gas is introduced and the furnace body is heated, thereby completing the sintering operation of aluminum nitride powder. However, in actual use, when the powder enters the furnace, the powder itself is very easy to absorb moisture and the powder is prone to clumping together. The clumped material makes it difficult for the sintering aid and atmosphere to come into full contact, which will lead to uneven heating and asynchronous densification process during sintering, and ultimately produce defects such as cracks and holes inside the product. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as excessive agglomeration of aluminum nitride powder fed into the furnace and poor sintering quality, and to propose an aluminum nitride powder sintering furnace.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The design includes an aluminum nitride powder sintering furnace, comprising a furnace body and a powder dispersing assembly. The powder dispersing assembly includes a transfer chamber, which is fixedly connected to the furnace body. A feed hopper is connected to the surface of the transfer chamber, and a motor is fixedly connected to the side of the feed hopper. A rotating shaft is rotatably connected through the feed hopper, and a pusher plate is fixedly connected to the circumferential side of the rotating shaft. The output end of the motor is fixedly connected to the rotating shaft. A U-shaped plate is slidably connected inside the transfer chamber, and a sliding sleeve is fixedly connected to the side of the U-shaped plate. The sliding sleeve is slidably engaged with the transfer chamber, and several ceramic rods are provided on each sliding sleeve. A heating assembly for heating is fixedly connected to the side of the furnace body.

[0005] Preferably, the upper and lower sides of the sliding sleeve are curved surfaces.

[0006] Preferably, a straight plate is fixedly connected to the surface of the furnace body, a rotating rod is rotatably connected to the straight plate, a first sprocket is fixedly connected to one end of the rotating rod, a turntable is fixedly connected to the other end of the rotating rod, a drive shaft is fixedly connected to the eccentric position of the turntable, a driven rail is fixedly connected to the side of the U-shaped plate, and the drive shaft and the driven rail are in sliding engagement.

[0007] Preferably, a second sprocket is fixedly connected to the end of the shaft, and a transmission chain is provided between the first sprocket and the second sprocket for transmission.

[0008] Preferably, the heating component includes a bonding chamber, which is fixedly connected to the furnace body, and an electric heating wire is fixedly connected inside the bonding chamber.

[0009] Preferably, the diameter of the first sprocket is smaller than that of the second sprocket.

[0010] The beneficial effects of the aluminum nitride powder sintering furnace proposed in this utility model are as follows: the rotating shaft drives the conveyor plate to rotate at the feed hopper position, which can continuously and evenly input aluminum nitride powder into the furnace body. At the same time as the conveyor plate rotates, it can drive multiple ceramic rods to move back and forth in the transfer chamber, thereby breaking up the lumps that enter, and thus improving the sintering quality of aluminum nitride powder. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the aluminum nitride powder sintering furnace.

[0012] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0013] Figure 3 This is a schematic diagram of the cross-sectional structure of the furnace body of this utility model.

[0014] Figure 4 This is a schematic cross-sectional view of the transfer chamber and feed hopper of this utility model.

[0015] Figure 5 This is an assembly drawing of the U-shaped plate and the driven rail of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Furnace body; 2. Transfer chamber; 3. Feed hopper; 4. Motor; 5. Rotating shaft; 6. Push plate; 7. U-shaped plate; 8. Sliding sleeve; 9. Ceramic rod; 10. Curved surface; 11. Straight plate; 12. Rotating rod; 13. First sprocket; 14. Turntable; 15. Drive shaft; 16. Driven rail; 17. Second sprocket; 18. Transmission chain belt; 19. Bonding chamber; 20. Electric heating wire. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example 1 Reference Figure 1-5 This utility model is an aluminum nitride powder sintering furnace, including a furnace body 1 and a powder dispersing component. The powder dispersing component includes a transfer chamber 2, which is fixedly connected to the furnace body 1. A feed hopper 3 is connected to the surface of the transfer chamber 2. A motor 4 is fixedly connected to the side of the feed hopper 3. A rotating shaft 5 is rotatably connected through the feed hopper 3. A pusher plate 6 is fixedly connected to the side of the rotating shaft 5. The output end of the motor 4 is fixedly connected to the rotating shaft 5. A U-shaped plate 7 is slidably connected inside the transfer chamber 2. A sliding sleeve 8 is fixedly connected to the side of the U-shaped plate 7. The sliding sleeve 8 is slidably engaged with the transfer chamber 2. Several ceramic rods 9 are provided on each sliding sleeve 8. A heating component for heating is fixedly connected to the side of the furnace body 1. The upper and lower sides of the sliding sleeve 8 are arc surfaces 10. A straight plate 11 is fixedly connected to the surface of the furnace body 1. A rotating rod 12 is rotatably connected to the straight plate 11. A first sprocket 13 is fixedly connected to one end of the rotating rod 12. A turntable 14 is fixedly connected to the other end of the rotating rod 12. A drive shaft 15 is fixedly connected to the turntable 14 at an eccentric position. A driven rail 16 is fixedly connected to the side of the U-shaped plate 7. The drive shaft 15 and the driven rail 16 slide together.

[0019] The operation process of this embodiment is as follows: The aluminum nitride powder to be sintered is placed into the feed hopper 3. The top of the feed hopper 3 can be connected to a funnel to increase the powder capacity in the feed hopper 3. When feeding, the motor 4 drives the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 drives each pusher plate 6 to rotate. The middle of the feed hopper 3 is circular. The ends of the pusher plates 6 are always in contact with the feed hopper 3 and slide. When the rotating shaft 5 rotates, the rotational force will drive the pusher plates 6 to continuously feed the powder in the feed hopper 3 toward the furnace body 1. After being conveyed to a certain quantity, the aluminum nitride powder can be sintered. In actual use, the powder entering the furnace body 1 may contain a lot of lumps. Therefore, the powder falls from the feed hopper 3 into the transfer chamber 2, and then from the transfer chamber 2 into the furnace body 1. When passing through the transfer chamber 2, the powder falls through the sliding sleeve 8 composed of multiple ceramic rods 9. At this time, the multiple ceramic rods 9 form a cutting mesh to break up large lumps of aluminum nitride powder. Alternatively, the first sprocket 13 can be rotated. The rotation of the first sprocket 13 drives the rotating rod 12, the turntable 14, and the drive shaft 15 to rotate. The drive shaft 15 is located at an eccentric position on the turntable 14. Please refer to [link / reference]. Figure 4 At this time, the rotation of the drive shaft 15 can drive the driven rail 16 and the U-shaped plate 7 to move up and down reciprocally, thereby causing the cutting net formed in the transfer chamber 2 to move up and down reciprocally, which can break up the clumps of falling powder and improve the quality of aluminum nitride after sintering.

[0020] Example 2 The first sprocket 13 requires an additional drive unit to rotate, increasing the production cost of the device. Therefore, please refer to [link / reference needed]. Figure 3-5 Based on the first specific embodiment, a second sprocket 17 is fixedly connected to the end of the rotating shaft 5, and a transmission chain belt 18 is provided between the first sprocket 13 and the second sprocket 17. The heating component includes a bonding chamber 19, which is fixedly connected to the furnace body 1. An electric heating wire 20 is fixedly connected inside the bonding chamber 19. The diameter of the first sprocket 13 is smaller than that of the second sprocket 17.

[0021] The operation process of this embodiment is as follows: When feeding, the rotating shaft 5 needs to rotate to drive the push plate 6 to rotate, thereby completing the feeding of powder in the feed hopper 3. At this time, the rotating shaft 5 rotates to drive the second sprocket 17 to rotate. The diameter of the second sprocket 17 is larger than that of the first sprocket 13. At this time, after being driven by the conveyor belt, the push plate 6 feeds the material into the furnace body 1, and at the same time, it drives the first sprocket 13 to rotate rapidly, thereby driving each ceramic rod 9 to move up and down rapidly to break up the agglomerates. The ceramic rod 9 is driven to move back and forth by the rotation of the conveyor plate, which improves the practicality of the device. In actual operation, an air pipe is set at the top of the furnace body 1, through which inert gas can be introduced into the furnace body 1, and heated by the electric heating wire 20 to heat the bonding chamber 19. The heat is then conducted by the bonding chamber 19 to complete the heating of the furnace body 1. A discharge pipe is set on the side of the furnace body 1 to complete the discharge of powder.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An aluminum nitride powder sintering furnace, comprising a furnace body (1), characterized in that: It also includes a powder dispersing component, which includes a transfer chamber (2) and is fixedly connected to the furnace body (1). A feed hopper (3) is connected to the surface of the transfer chamber (2). A motor (4) is fixedly connected to the side of the feed hopper (3). A rotating shaft (5) is rotatably connected through the feed hopper (3). A pusher plate (6) is fixedly connected to the side of the rotating shaft (5). The output end of the motor (4) is fixedly connected to the rotating shaft (5). A U-shaped plate (7) is slidably connected inside the transfer chamber (2). A sliding sleeve (8) is fixedly connected to the side of the U-shaped plate (7). The sliding sleeve (8) is slidably engaged with the transfer chamber (2). Several ceramic rods (9) are provided on each of the sliding sleeves (8). A heating component for heating is fixedly connected to the side of the furnace body (1).

2. The aluminum nitride powder sintering furnace according to claim 1, characterized in that, The upper and lower sides of the sliding sleeve (8) are curved surfaces (10).

3. The aluminum nitride powder sintering furnace according to claim 1, characterized in that, A straight plate (11) is fixedly connected to the surface of the furnace body (1). A rotating rod (12) is rotatably connected to the straight plate (11). A first sprocket (13) is fixedly connected to one end of the rotating rod (12). A turntable (14) is fixedly connected to the other end of the rotating rod (12). A drive shaft (15) is fixedly connected to the eccentric position of the turntable (14). A driven rail (16) is fixedly connected to the side of the U-shaped plate (7). The drive shaft (15) and the driven rail (16) slide together.

4. The aluminum nitride powder sintering furnace according to claim 3, characterized in that, The end of the rotating shaft (5) is fixedly connected to a second sprocket (17), and a transmission chain belt (18) is provided between the first sprocket (13) and the second sprocket (17).

5. The aluminum nitride powder sintering furnace according to claim 1, characterized in that, The heating component includes a bonding chamber (19), which is fixedly connected to the furnace body (1), and an electric heating wire (20) is fixedly connected inside the bonding chamber (19).

6. The aluminum nitride powder sintering furnace according to claim 3, characterized in that, The diameter of the first sprocket (13) is smaller than that of the second sprocket (17).

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