Microwave-assisted sintering device for low-temperature fast-fired conductive ceramics

Abstract

The utility model relates to the technical field of ceramic sintering, and discloses a low-temperature fast-firing conductive ceramic microwave-assisted sintering device which comprises a microwave sintering furnace and a furnace chamber arranged on the microwave sintering furnace, the furnace chamber comprises a sintering chamber, a placing frame is connected in the furnace chamber in a sliding mode, and the placing frame comprises placing plates and sealing plates which are fixed alternately. The sealing plate is used for shielding the furnace chamber; the placing frame is arranged in the furnace chamber of the microwave sintering furnace, the placing frame is formed by alternately fixing the placing plates and the sealing plates, a plurality of conductive ceramics can be placed on the placing plates, the placing frame is moved to enable the conductive ceramics to sequentially enter the sintering chamber of the furnace chamber to be sintered, and the conductive ceramics are directly moved out after being sintered. The efficient sintering of the conductive ceramic is realized by adopting a reciprocating translation mode, the conductive ceramic is convenient to take, and the sintered conductive ceramic is still sintered when the sintered conductive ceramic is taken, so that the sintering efficiency is improved, and the phenomena of heat dissipation and energy waste caused by repeatedly opening the furnace chamber are avoided.

Description

Technical Field

[0001] This utility model relates to the field of ceramic sintering technology, specifically to a low-temperature fast-firing conductive ceramic microwave-assisted sintering device. Background Technology

[0002] Conductive ceramics are a new type of functional material possessing ionic, electronic, or hole conductivity. They exhibit characteristics such as oxidation resistance, corrosion resistance, radiation resistance, high temperature resistance, and long lifespan, and are widely used in solid fuel cell electrodes, gas-sensitive elements, high-temperature heating elements, fixed resistors, redox materials, ferroelectric materials, and high-critical-temperature superconducting materials. In the production process of conductive ceramics, microwave sintering furnaces are used for low-temperature rapid sintering, which improves gas density, enhances mechanical strength, and improves electrical properties.

[0003] In existing microwave sintering furnaces, when sintering conductive ceramics, the furnace door needs to be opened after each sintering to remove the conductive ceramics and then place unsintered conductive ceramics in. Opening the furnace door again results in a large amount of heat dissipation, leading to a waste of heat energy and reducing the sintering speed of the conductive ceramics. In addition, the need to open the furnace door to handle the conductive ceramics results in low efficiency, and the high temperature inside the furnace cavity makes it inconvenient to handle the conductive ceramics and use them. To address this, a low-temperature fast-firing microwave-assisted sintering device for conductive ceramics is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a low-temperature rapid-fired conductive ceramic microwave-assisted sintering device, which solves the problems of low sintering efficiency and easy heat waste in existing microwave sintering furnaces for conductive ceramics.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a microwave-assisted sintering device for low-temperature fast-firing conductive ceramics, comprising a microwave sintering furnace and a furnace cavity disposed thereon, wherein the furnace cavity includes a sintering chamber, and a placement frame is slidably connected inside the furnace cavity, wherein the placement frame includes alternately fixed placement plates and sealing plates, and the sealing plates are used to shield the furnace cavity.

[0006] Preferably, the furnace cavity further includes two stepped cooling chambers, which are located at both ends of the sintering cavity. One side wall of each stepped cooling chamber is provided with a heat dissipation vent, and the other side is equipped with a hot air blower.

[0007] Preferably, the sealing plate has a sealing groove on its periphery, and a limiting groove is provided on the inner wall at the connection between the sintering cavity and the stepped cooling cavity. A sealing block is slidably connected in the limiting groove, and multiple springs for applying a pushing force to the sealing block are installed in the limiting groove. A guide angle is provided on the outer end face of the sealing block.

[0008] Preferably, both ends of the sealing plug are provided with a 45° bevel, and the bevels of adjacent sealing plugs abut against each other.

[0009] Preferably, two crossbars are fixedly connected between two adjacent sealing plates, and the crossbars are located at the upper corner of the sealing plate.

[0010] Preferably, handles are fixedly connected to the outer walls of the two sealing plates at both ends, and the length of the handles is greater than the maximum distance between the two sealing plates.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention features a placement rack within the microwave sintering furnace cavity. The rack consists of multiple placement plates and multiple sealing plates that are alternately fixed. Multiple conductive ceramics can be placed on these plates. By moving the rack, the conductive ceramics sequentially enter the sintering chamber of the furnace for sintering. After sintering, the ceramics are directly removed. This reciprocating translational method achieves efficient sintering of the conductive ceramics, facilitating their removal. Furthermore, even when removing sintered ceramics, some are still undergoing sintering, improving sintering efficiency and eliminating the need to repeatedly open the furnace cavity, thus preventing heat dissipation and energy waste.

[0013] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the other side of the overall structure of this utility model;

[0016] Figure 3 This is a schematic cross-sectional view of the furnace cavity of this utility model;

[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This is a schematic diagram of the sealing plug of this utility model.

[0019] In the diagram: 1. Microwave sintering furnace; 2. Furnace cavity; 21. Sintering chamber; 22. Stepped cooling chamber; 3. Placement rack; 31. Placement plate; 32. Sealing plate; 4. Handle; 5. Crossbar; 6. Heat dissipation vent; 7. Hot air blower; 8. Limiting groove; 9. Sealing block; 10. Spring; 11. Sealing groove; 12. Guide angle; 13. Angled angle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model discloses a low-temperature rapid-firing microwave-assisted sintering device for conductive ceramics, comprising a microwave sintering furnace 1 and a furnace cavity 2 disposed on the microwave sintering furnace 1. The furnace cavity 2 includes a sintering chamber 21. A microwave magnetron in the microwave sintering furnace 1 is installed inside the sintering chamber 21. The microwave magnetron is used to emit microwaves and can be installed on the sides or top wall of the sintering chamber 21. A placement rack 3 is slidably connected inside the furnace cavity 2. The placement rack 3 includes multiple placement plates 31 and multiple sealing plates 32, which are alternately fixedly connected. Both the placement plates 31 and the sealing plates 32 are made of high-temperature resistant microwave-insulating materials, such as graphite. The conductive ceramic is placed on the placement plate 31, and the sealing plate 32 seals the furnace cavity 2. During the low-temperature rapid-firing of the conductive ceramic, the conductive ceramic is placed inside the placement plate 31 and moved... The entire placement rack 3 moves the conductive ceramic to the sintering chamber 21. The conductive ceramic is then rapidly heated at a low temperature by a microwave magnetron inside the sintering chamber 21. After sintering, the rack continues to push forward or pull backward to move the next unsintered conductive ceramic into the sintering chamber 21. The sintered conductive ceramic is then removed from the sintering chamber 21 for cooling. After the sintered conductive ceramic is removed from the placement plate 31, unsintered conductive ceramics are placed into it. By using the forward and backward movement of the placement rack 3, efficient sintering of the conductive ceramic is achieved. The overall structure is simple, and the reciprocating translation method is used to achieve efficient sintering of the conductive ceramic. This makes it easy to pick up the conductive ceramic, and there are still conductive ceramics undergoing sintering when the sintered conductive ceramic is picked up, improving sintering efficiency. It also eliminates the need to repeatedly open the furnace chamber 2, which would cause heat dissipation and energy waste.

[0022] The furnace cavity 2 also includes two stepped cooling cavities 22, which are located at both ends of the sintering cavity 21 and connected to it. One side of each stepped cooling cavity 22 has a heat dissipation vent 6, and the other side is equipped with a hot air blower 7. After the conductive ceramic is sintered in the sintering cavity 21, it is moved to the stepped cooling cavity 22 via a placement rack 3. The hot air blower 7 is then activated to blow hot air onto the conductive ceramic, and the heat is dissipated through the heat dissipation vent 6. The temperature of the hot air blown out by the hot air blower 7 is lower than the temperature inside the sintering cavity 21. The temperature of the hot air blown out by the hot air blower 7 can be continuously controlled to decrease, thereby continuously controlling the cooling of the conductive ceramic to balance its conductivity. To improve the adaptability of ceramics by relieving stress and meeting performance requirements, the hot air blower 7 cools the conductive ceramics for a shorter time than the sintering time. Therefore, once the conductive ceramics are sintered, they can be pushed into the stepped cooling chamber 22. Another conductive ceramic in the stepped cooling chamber 22 is also cooled and moved out of the furnace chamber 2. The conductive ceramic moved out of the furnace chamber 2 can be cooled again using a fan or other equipment to achieve stepped cooling, adapting to the material of the conductive ceramics and ensuring their quality. Similarly, before the conductive ceramics are sintered, they can be preheated by blowing constant hot air or continuously heating hot air from the hot air blower 7 to improve sintering efficiency.

[0023] A sealing groove 11 is provided on the peripheral edge of the sealing plate 32. Limiting grooves 8 are provided on the four inner walls of the connection between the sintering chamber 21 and the stepped cooling chamber 22. A sealing block 9 is slidably connected in the limiting groove 8. Multiple springs 10 for applying a pushing force to the sealing block 9 are installed in the limiting groove 8. A guide angle 12 is provided on the outer end face of the sealing block 9. When the placement frame 3 is pushed, the sealing plate 32 fixes the sealing block 9 into the limiting groove 8 through the guide angle 12 of the sealing block 9. When the sealing groove 11 on the sealing plate 32 moves to correspond with the sealing block 9, the sealing block 9 is inserted into the limiting groove 8 under the elastic force of the spring 10. At this time, the two sealing plates 32 and the sealing block 9 can seal the sintering chamber 21, reducing heat leakage and waste. At the same time, they can also be used to position the movement of the placement frame 3. After sintering, the placement frame 3 moves, and the sealing plate 32 also uses the guide angle 12 of the sealing block 9 to push it off, which is convenient for use.

[0024] Both ends of the sealing plug 9 are provided with a 45° bevel angle 13. The bevel angles 13 at the ends of two adjacent sealing plugs 9 abut each other, which improves the sealing performance and ensures that multiple sealing plugs 9 can completely seal the sealing groove 11.

[0025] Two crossbars 5 are fixedly connected between two adjacent sealing plates 32. The crossbars 5 are located at the upper corner of the sealing plate 32. The crossbars 5, together with the placement plate 31, can fix both the upper and lower ends of the two sealing plates 32, thereby improving the strength of the sealing plates 32.

[0026] Handles 4 are fixedly connected to the outer walls of the two sealing plates 32 at both ends. The length of the handles 4 is greater than the maximum distance between the two sealing plates 32. The entire placement rack 3 can be moved by the handles 4, making it convenient to push the placement rack 3 forward and pull it backward.

Claims

1. A low-temperature fast-firing conductive ceramic microwave-assisted sintering device, comprising a microwave sintering furnace (1) and a furnace cavity (2) arranged thereon, characterized in that, The furnace cavity (2) comprises a sintering cavity (21), a placing rack (3) is slidably connected in the furnace cavity (2), the placing rack (3) comprises alternately fixed placing plates (31) and sealing plates (32), and the sealing plates (32) are used for shielding the furnace cavity (2).

2. The low temperature fast firing conductive ceramic microwave assisted sintering device as claimed in claim 1, wherein, The furnace cavity (2) further comprises two stepped cooling cavities (22), the two stepped cooling cavities (22) are respectively located at two ends of the sintering cavity (21), a heat dissipation opening (6) is arranged on one side wall of the stepped cooling cavity (22), and a hot air fan (7) is arranged on the other side wall.

3. The low temperature fast firing conductive ceramic microwave assisted sintering device as claimed in claim 1, wherein, A sealing groove (11) is arranged on the circumferential side of the sealing plate (32), a limiting groove (8) is arranged on the inner wall of a communication part between the sintering cavity (21) and the stepped cooling cavity (22), a sealing plug (9) is slidably connected in the limiting groove (8), a plurality of springs (10) for applying a pushing force to the sealing plug (9) are arranged in the limiting groove (8), and a guide angle (12) is arranged on the outer end surface of the sealing plug (9).

4. The apparatus according to claim 3, wherein the apparatus is characterized by: The two ends of the sealing plug (9) are respectively provided with 45° inclined angles (13), and the inclined angles (13) of the adjacent sealing plugs (9) abut against each other.

5. The apparatus according to claim 1, wherein the apparatus is a microwave assisted sintering apparatus for sintering a low-temperature fast-firing conductive ceramic. Two cross rods (5) are fixedly connected between the two adjacent sealing plates (32), and the cross rods (5) are located at upper corner positions of the sealing plates (32).

6. The apparatus according to claim 1, wherein the apparatus is a microwave assisted sintering apparatus for sintering a low-temperature fast-firing conductive ceramic. The outer walls of the two sealing plates (32) located at the two ends are fixedly connected with handles (4), and the length of the handle (4) is greater than the maximum distance between the two sealing plates (32).

Images