Splicing type carbon ceramic sagger and manufacturing method thereof

Abstract

The invention discloses a spliced carbon-ceramic sagger and a manufacturing method thereof, and belongs to the technical field of sagger manufacturing, the spliced carbon-ceramic sagger comprises four carbon-ceramic composite material spliced side plates, steps are arranged at the left end and the right end of each spliced side plate, and a boss is arranged at the bottom end of each spliced side plate; grooves connected with the bosses at the bottom ends of the splicing side plates are formed in the four edges of the carbon-ceramic composite material bottom plate. The four fixed angle plates are arranged at the steps at the two ends of the splicing side plates; and the carbon ceramic bolts are used for fixing the splicing side plates, the bottom plate and the fixing angle plates. According to the spliced carbon-ceramic sagger and the manufacturing method thereof, the carbon fiber reinforced silicon carbide ceramic composite material is adopted, so that the spliced carbon-ceramic sagger has high strength, toughness and impact resistance of carbon fibers and high hardness, wear resistance and high temperature resistance of silicon carbide ceramic, and the service life of a product is effectively prolonged; due to the splicing type structure, the machining process is simplified, the special requirement for machining equipment is lowered, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of saggar manufacturing technology, specifically to a spliced ​​carbon ceramic saggar and its manufacturing method. Background Technology

[0002] As a high-temperature carbonization container for supporting the graphite anode material of lithium batteries, the crucible operates in an oxygen-rich environment with a long-term operating temperature of 1200-1500℃, requiring the selection of high-temperature resistant and oxidation-resistant materials.

[0003] Currently, there are two main types of sagger products on the market:

[0004] Graphite saggers are mostly made of a single piece of graphite material with the center hollowed out. This structure results in extremely low utilization of graphite material, significant waste, and high production costs. Furthermore, graphite material itself is brittle and prone to breakage, leading to material leakage, safety hazards, and economic losses.

[0005] While carbon-carbon saggers offer improved performance, their long production cycle and oxidation reaction in oxygen-rich environments above 400°C cause carbon fiber filaments to detach, affecting the purity of graphite anode materials for lithium-ion batteries. Furthermore, the integrated carbon-carbon sagger manufacturing process demands sophisticated equipment and suffers from low efficiency, hindering its widespread application in the graphite anode material market.

[0006] Therefore, there is an urgent need to develop a new type of sagger that can meet the requirements of use in high-temperature and oxygen-rich environments, improve material utilization, reduce production costs, and ensure stable product quality. Therefore, this application proposes a spliced ​​carbon ceramic sagger and its manufacturing method to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a spliced ​​carbon ceramic sagger and its manufacturing method, which has advantages such as long service life, low operating cost, high production quality, high production efficiency, and low production cost, thus solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A modular carbon ceramic sagger, comprising:

[0010] Four carbon-ceramic composite material splicing side panels, each with steps at both ends and a boss at the bottom.

[0011] A carbon-ceramic composite material base plate, wherein the four sides of the base plate are provided with grooves that connect to the bosses at the bottom of the splicing side plates;

[0012] Four fixed corner plates are provided at the steps at both ends of the splicing side plates;

[0013] Multiple carbon ceramic bolts are used to fix the splicing side plates, the bottom plate, and the fixed corner plates.

[0014] Furthermore, the carbon-ceramic composite material is composed of carbon fiber reinforced silicon carbide ceramic.

[0015] Furthermore, the density of the carbon-ceramic composite material is 2.0 g / cm³. 3 -2.5g / cm 3 .

[0016] Furthermore, the thickness of the splicing side panels and bottom plate is 6-15mm.

[0017] Furthermore, the thickness of the steps at both ends of the splicing side panel is half the thickness of the splicing side panel.

[0018] Furthermore, the fixed angle plate has an L-shaped shape.

[0019] Furthermore, the splicing side plate, bottom plate, and fixed corner plate are all provided with threaded holes that are compatible with carbon ceramic bolts.

[0020] Another technical problem to be solved by the present invention is to provide a method for manufacturing a spliced ​​carbon ceramic sagger, comprising the following steps:

[0021] S1. Fabrication of carbon-carbon composite panels: Carbon fiber preform panels are prepared and densified to 1.4 g / cm³ using isothermal chemical vapor deposition. 3 This forms carbon-carbon composite material panels;

[0022] S2, Carbon-ceramic composite material sheet production: The density increased to 1.4 g / cm³ 3 The carbon-carbon composite material sheet was transferred to a silicon infiltration furnace and melt-infiltrated at 1600℃, resulting in a density of 2.0 g / cm³ after exiting the furnace. 3 The above carbon ceramic composite material panels;

[0023] S3. Side plate fabrication: Using 6-15mm carbon-ceramic composite material sheets after deposition, process four side plates of the same size from the carbon-ceramic composite material sheets. Mill steps with half the overall thickness at the left and right ends of the side plates and cut the bottom of the side plates into a boss shape. After processing, the side plates are obtained.

[0024] S4. Base plate fabrication: Using a 6-15mm thick carbon-ceramic composite material sheet after deposition, process the carbon-ceramic composite material sheet into a square base plate. Cut grooves on the four sides of the base plate. After processing, the base plate is obtained.

[0025] S5. Fixing corner plate fabrication: Using 6-15mm carbon-ceramic composite material plates after deposition, select carbon-ceramic composite material plates with relatively thicker thickness, process the carbon-ceramic composite material plates into four L-shaped strips, and after processing, obtain the fixing corner plate;

[0026] S6. Assemble the carbon ceramic sagger: Place the fixing angle plate on the steps on both sides of the side plate, flush with the inside of the side plate, and then fix it with carbon ceramic bolts. Then insert the protrusion of the side plate into the groove of the bottom plate, and fix the side plate and the bottom plate with carbon ceramic bolts to form a complete carbon ceramic sagger.

[0027] Furthermore, the number of carbon ceramic bolts is adjusted according to the size of the carbon ceramic sagger.

[0028] Compared with the prior art, the present invention provides a spliced ​​carbon ceramic sagger and its manufacturing method, which has the following beneficial effects:

[0029] 1. The spliced ​​carbon ceramic sagger and its manufacturing method utilize carbon fiber reinforced silicon carbide ceramic composite material, which combines the high strength, toughness and impact resistance of carbon fiber with the high hardness, wear resistance and high temperature resistance of silicon carbide ceramic. The high thermal conductivity is conducive to heat dissipation, the low coefficient of thermal expansion ensures dimensional stability, and the good oxidation resistance extends the service life of the product.

[0030] 2. The spliced ​​carbon ceramic sagger and its manufacturing method adopt a spliced ​​structure, which is assembled from multiple prefabricated panels. Compared with the traditional one-piece structure, it greatly improves the material utilization rate and reduces the production cost. The spliced ​​structure allows for the replacement of damaged parts individually when there is local damage, without the need to scrap the whole, further reducing the cost of use.

[0031] 3. The modular carbon ceramic sagger and its manufacturing method allow for flexible size adjustments based on customer needs, shortening the procurement cycle; the modular structure simplifies the processing technology, reduces special requirements for processing equipment, and improves production efficiency.

[0032] 4. The spliced ​​carbon-ceramic sagger and its manufacturing method ensure that the carbon-ceramic composite material has stable performance in a high-temperature and oxygen-rich environment, avoiding the brittle fracture of graphite materials and the oxidation of carbon-carbon materials, thus guaranteeing the production quality and safety of graphite anode materials for lithium batteries. Attached Figure Description

[0033] Figure 1 This is an overall assembly diagram of a spliced ​​carbon ceramic sagger and its manufacturing method proposed in this invention.

[0034] Figure 2 This is an exploded view of the structure of a spliced ​​carbon ceramic sagger and its manufacturing method proposed in this invention. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] Please see Figures 1 to 2 In this embodiment, a spliced ​​carbon ceramic sagger includes four spliced ​​carbon ceramic composite side plates 1, a carbon ceramic composite base plate 2, four fixing corner plates 3, and multiple carbon ceramic bolts.

[0038] In this embodiment, carbon fiber reinforced silicon carbide ceramic composite material is used, which combines the high strength, toughness, and impact resistance of carbon fiber with the high hardness, wear resistance, and high temperature resistance of silicon carbide ceramic. High thermal conductivity facilitates heat dissipation, a low coefficient of thermal expansion ensures dimensional stability, and good oxidation resistance extends the product's service life. By adopting a spliced ​​structure assembled from multiple prefabricated panels, material utilization is significantly improved and production costs are reduced compared to traditional integrated structures. The spliced ​​structure also allows for individual replacement of damaged parts in case of localized damage, eliminating the need for complete scrapping and further reducing operating costs.

[0039] Specifically, the splicing side panel 1 is made of carbon fiber reinforced silicon carbide ceramic material with a thickness of 10mm. Steps are provided at both ends of the splicing side panel 1, with a step thickness of 5mm (half the thickness of the side panel). A boss is provided at the bottom of the splicing side panel 1, with a height of 5mm and a width of 8mm.

[0040] Specifically, the base plate 2 is also made of carbon fiber reinforced silicon carbide ceramic material with a thickness of 10mm. The four sides of the base plate 2 are provided with grooves, which are 5mm deep and 8mm wide, matching the bosses at the bottom of the splicing side plate 1.

[0041] Specifically, the fixing angle plate 3 is an L-shaped strip made of a 10mm thick carbon ceramic composite material sheet. The lengths of the two right-angled sides of the fixing angle plate 3 are the same as the height of the splicing side plate 1.

[0042] Specifically, the carbon-ceramic bolts are made of the same carbon-ceramic composite material as the crucible, with a diameter of 6mm and a length that can be adjusted between 20-40mm depending on the connection part.

[0043] Example 2:

[0044] This embodiment provides a method for manufacturing a spliced ​​carbon ceramic sagger, the specific steps of which are as follows:

[0045] A1. Fabrication of carbon-carbon composite material sheets:

[0046] A1-1. T700 grade carbon fiber is used to prepare a three-dimensional woven prefabricated plate with a thickness of 10mm.

[0047] A1-2. Place the preform into a chemical vapor deposition furnace and perform densification treatment at 1000℃ using isothermal chemical vapor deposition (CVI process);

[0048] A1-3. By controlling the deposition time and process parameters, the density of the plate was made to reach 1.4 g / cm³. 3 .

[0049] A2. Fabrication of carbon-ceramic composite material panels:

[0050] A2-1. Place the densified carbon-carbon composite material sheet into a silicon diffusion furnace;

[0051] A2-2. Heat to 1600℃ in a vacuum environment and hold for 2 hours to perform melt infiltration of silicon.

[0052] A2-3, After being removed from the furnace, the density is 2.0 g / cm³. 3 The above are carbon ceramic composite material panels.

[0053] A3. Side panel fabrication:

[0054] A3-1. Use a wire EDM machine to cut the carbon ceramic composite material sheet into four rectangular plates of the same size;

[0055] A3-2. Machining steps at both ends of side plate 1 on a milling machine, with a step thickness of 5mm;

[0056] A3-3. A boss with a height of 5mm and a width of 8mm is machined at the bottom of side plate 1;

[0057] A3-4. Drill holes and tap them at the connection points to form M6 threaded holes.

[0058] A4. Base Plate Fabrication:

[0059] A4-1. Cut the carbon ceramic composite material sheet into squares;

[0060] A4-2. Machining grooves with a depth of 5mm and a width of 8mm on all four sides of the base plate 2;

[0061] A4-3. Drill holes and tap at the connection points to form M6 threaded holes.

[0062] A5. Fixing Angle Plate Fabrication:

[0063] A5-1, Select carbon ceramic composite material plates with a thickness of 15mm;

[0064] A5-2, cut into L-shaped strips with a thickness of 5mm, the length of the two right-angled sides of the L-shaped strips being the same as the height of side plate 1;

[0065] A5-3. Drill holes and tap at the connection points to form M6 threaded holes.

[0066] A6. Assembly of carbon ceramic saggers:

[0067] A6-1. Place the fixing angle plate 3 at the steps at both ends of the side plate 1, so that the inner surface of the fixing angle plate 3 is flush with the inner surface of the side plate 1.

[0068] A6-2. Fix the fixing angle plate 3 to the side plate 1 with carbon ceramic bolts;

[0069] A6-3. Insert the protrusions at the bottom of the four side plates 1 into the grooves of the base plate 2;

[0070] A6-4. Fix the side plate 1 to the bottom plate 2 with carbon ceramic bolts;

[0071] A6-5. Check that all connections are secure and complete the assembly of the carbon ceramic sagger.

[0072] In this embodiment, the measured performance of the carbon ceramic sagger is as follows:

[0073] Load capacity: Static load ≥ 50 kg (1300℃);

[0074] Air tightness: Helium leak detection rate < 1×10 -9 Pa·m 3 / s;

[0075] Material utilization rate: increased from 30% in one-piece designs to 85%;

[0076] Production costs: 42% lower than traditional carbon saggers.

[0077] Example 3:

[0078] This embodiment provides a method for manufacturing a spliced ​​carbon ceramic sagger, the specific steps of which are as follows:

[0079] B1. Fabrication of carbon-carbon composite material panels:

[0080] B1-1. T700 grade carbon fiber is used to prepare three-dimensional woven prefabricated panels with a thickness of 8mm.

[0081] B1-2. Place the preform into a chemical vapor deposition furnace and perform densification treatment at 1000℃ using an isothermal CVI process;

[0082] B1-3. By controlling the deposition time and process parameters, the density of the plate was made to reach 1.4 g / cm³. 3 .

[0083] B2. Fabrication of carbon-ceramic composite material panels:

[0084] B2-1. Place the densified carbon-carbon composite material sheet into a silicon diffusion furnace;

[0085] B2-2. Heat to 1600℃ in a vacuum environment and hold for 2 hours to perform melt infiltration of silicon.

[0086] B2-3, after being removed from the furnace, the density is 2.0 g / cm³. 3 The above are carbon ceramic composite material panels.

[0087] B3. Side panel fabrication:

[0088] B3-1. Use a wire EDM machine to cut the carbon ceramic composite material sheet into four rectangular plates of the same size;

[0089] B3-2. Machining the steps at both ends of the side plate 1 on a milling machine, with a step thickness of 4mm;

[0090] B3-3. A boss with a height of 4mm and a width of 8mm is machined at the bottom of side plate 1;

[0091] B3-4. Drill holes and tap at the connection points to form M5 threaded holes.

[0092] B4. Base Plate Fabrication:

[0093] B4-1. Cut the carbon ceramic composite material sheet into squares;

[0094] B4-2. Machining grooves with a depth of 4mm and a width of 8mm on all four sides of the base plate 2;

[0095] B4-3. Drill holes and tap at the connection points to form M5 threaded holes.

[0096] B5. Installation of the fixed corner plate:

[0097] B5-1, Select carbon ceramic composite material plates with a thickness of 12mm;

[0098] B5-2. Cut into L-shaped strips with a thickness of 4mm. The length of the two right-angled sides of the L-shaped strips is the same as the height of side plate 1.

[0099] B5-3. Drill holes and tap them at the connection points to form M5 threaded holes.

[0100] B6. Assembly of carbon ceramic saggers:

[0101] B6-1. Place the fixing angle plate 3 at the steps at both ends of the side plate 1, so that the inner surface of the fixing angle plate 3 is flush with the inner surface of the side plate 1.

[0102] B6-2. Fix the fixing angle plate 3 to the side plate 1 with carbon ceramic bolts;

[0103] B6-3. Insert the protrusions at the bottom of the four side plates 1 into the grooves of the base plate 2;

[0104] B6-4. Fix the side plate 1 to the bottom plate 2 with carbon ceramic bolts;

[0105] B6-5. Check that all connections are secure and complete the assembly of the carbon ceramic sagger.

[0106] It should be noted that, based on the size of the carbon ceramic sagger, each connection point is secured with two carbon ceramic bolts.

[0107] Example 4:

[0108] This embodiment provides a method for manufacturing a spliced ​​carbon ceramic sagger, the specific steps of which are as follows:

[0109] C1. Fabrication of carbon-carbon composite material sheets:

[0110] C1-1. Three-dimensional woven prefabricated panels made of T700 grade carbon fiber with a thickness of 15mm are used.

[0111] C1-2. The preform is placed in a chemical vapor deposition furnace and densified using an isothermal CVI process at 1000℃.

[0112] C1-3. By controlling the deposition time and process parameters, the density of the plate was made to reach 1.4 g / cm³. 3 .

[0113] C2. Fabrication of carbon-ceramic composite material panels:

[0114] C2-1. Place the densified carbon-carbon composite material sheet into a silicon diffusion furnace;

[0115] C2-2. Heat to 1600℃ in a vacuum environment and hold for 2 hours to perform melt infiltration of silicon.

[0116] C2-3, after being removed from the furnace, has a density of 2.0 g / cm³. 3 The above are carbon ceramic composite material panels.

[0117] C3. Side panel fabrication:

[0118] C3-1. Use a wire EDM machine to cut the carbon ceramic composite material sheet into four rectangular plates of the same size;

[0119] C3-2. Machining the steps at both ends of the side plate 1 on a milling machine, with a step thickness of 7.5mm;

[0120] C3-3. A boss with a height of 7.5mm and a width of 8mm is machined at the bottom of side plate 1;

[0121] C3-4. Drill holes and tap them at the connection points to form M8 threaded holes.

[0122] C4. Base Plate Fabrication:

[0123] C4-1. Cut the carbon ceramic composite material sheet into squares;

[0124] C4-2. Machining grooves with a depth of 7.5mm and a width of 8mm on the four sides of the base plate 2;

[0125] C4-3. Drill holes and tap at the connection points to form M8 threaded holes.

[0126] C5. Fabrication of the fixed angle plate:

[0127] C5-1, Select carbon ceramic composite material plates with a thickness of 20mm;

[0128] C5-2, cut into L-shaped strips with a thickness of 7.5mm, the lengths of the two right-angled sides of the L-shaped strips being the same as the height of side plate 1;

[0129] C5-3. Drill holes and tap at the connection points to form M8 threaded holes.

[0130] C6. Assembly of carbon ceramic saggers:

[0131] C6-1. Place the fixing angle plate 3 at the steps at both ends of the side plate 1, so that the inner surface of the fixing angle plate 3 is flush with the inner surface of the side plate 1.

[0132] C6-2. Fix the fixing angle plate 3 to the side plate 1 with carbon ceramic bolts;

[0133] C6-3. Insert the bosses at the bottom of the four side plates 1 into the grooves of the base plate 2;

[0134] C6-4. Fix the side plate 1 to the bottom plate 2 with carbon ceramic bolts;

[0135] C6-5. Check that all connections are secure and complete the assembly of the carbon ceramic sagger.

[0136] It should be noted that, depending on the size of the carbon ceramic sagger, each connection point is secured with three carbon ceramic bolts.

[0137] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0138] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A type of spliced ​​carbon ceramic sagger, characterized in that, include: Four carbon ceramic composite material splicing side plates (1), each of the left and right ends of the splicing side plate (1) is provided with a step, and the bottom end of the splicing side plate (1) is provided with a boss; A carbon ceramic composite material base plate (2) is provided with grooves on its four sides that are connected to the bosses at the bottom of the splicing side plate (1); Four fixed corner plates (3) are provided at the steps at both ends of the splicing side plate (1); Multiple carbon ceramic bolts are used to fix the splicing side plate (1), the base plate (2), and the fixing corner plate (3).

2. The spliced ​​carbon ceramic sagger according to claim 1, characterized in that: The carbon-ceramic composite material is composed of carbon fiber reinforced silicon carbide ceramic.

3. The spliced ​​carbon ceramic sagger according to claim 1, characterized in that: The density of the carbon-ceramic composite material is 2.0 g / cm³. 3 -2.5g / cm 3 .

4. The spliced ​​carbon ceramic sagger according to claim 1, characterized in that: The thickness of the splicing side plate (1) and the bottom plate (2) is 6-15mm.

5. A spliced ​​carbon ceramic sagger according to claim 1, characterized in that: The thickness of the steps at both ends of the splicing side plate (1) is half the thickness of the splicing side plate (1).

6. A spliced ​​carbon ceramic sagger according to claim 1, characterized in that: The fixed angle plate (3) is L-shaped.

7. A spliced ​​carbon ceramic sagger according to claim 1, characterized in that: The splicing side plate (1), the bottom plate (2), and the fixed corner plate (3) are all provided with threaded holes that are compatible with carbon ceramic bolts.

8. A method for manufacturing a spliced ​​carbon ceramic sagger, comprising using the spliced ​​carbon ceramic sagger as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Fabrication of carbon-carbon composite panels: Carbon fiber preform panels are prepared and densified to 1.4 g / cm³ using isothermal chemical vapor deposition. 3 This forms carbon-carbon composite material panels; S2, Carbon-ceramic composite material sheet production: The density increased to 1.4 g / cm³ 3 The carbon-carbon composite material sheet was transferred to a silicon infiltration furnace and melt-infiltrated at 1600℃, resulting in a density of 2.0 g / cm³ after exiting the furnace. 3 The above carbon ceramic composite material panels; S3, Side plate fabrication: Using the deposited 6-15mm carbon ceramic composite material plate, process four side plates (1) of the same size from the carbon ceramic composite material plate. Mill out steps with half the overall thickness at the left and right ends of the side plate (1). Cut the bottom end of the side plate (1) into a boss shape. After processing, the side plate (1) is obtained. S4. Base plate fabrication: Using the deposited 6-15mm carbon ceramic composite material plate, process the carbon ceramic composite material plate into a square base plate (2), cut grooves on the four sides of the base plate (2), and after processing, obtain the base plate (2). S5. Fixing corner plate fabrication: Using 6-15mm carbon-ceramic composite material plates after deposition, select carbon-ceramic composite material plates with relatively thicker thickness, process the carbon-ceramic composite material plates into four L-shaped strips, and after processing, obtain the fixing corner plate (3). S6. Assembly of carbon ceramic sagger: Place the fixing angle plate (3) on the steps on the left and right sides of the side plate (1) and make it flush with the inside of the side plate (1). Then fix it with carbon ceramic bolts. Then insert the protrusion of the side plate (1) into the groove of the bottom plate (2). Then fix the side plate (1) and the bottom plate (2) with carbon ceramic bolts to form a complete carbon ceramic sagger.

9. A method for manufacturing a spliced ​​carbon ceramic sagger according to claim 8, characterized in that: The number of carbon ceramic bolts is adjusted according to the size of the carbon ceramic sagger.

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