Carbon fiber thermal insulation material carbon felt ash content detection device

Abstract

The utility model discloses a carbon fiber thermal insulation material carbon felt ash content detection device, which belongs to the technical field of carbon fiber felt ash content detection, and comprises a muffle furnace body, a cavity is arranged in the muffle furnace body, a plurality of silicon molybdenum rods playing a role in heating are symmetrically and uniformly arranged in the cavity, and a support plate is arranged in the cavity. The supporting plate is provided with a plurality of notches used for containing crucibles, the bottom of the supporting plate is connected with a plurality of supporting legs used for supporting the supporting plate, a gas uniformizing plate is installed at the end, located in the cavity, of the furnace door of the muffle furnace body, a gas cavity is formed in the gas uniformizing plate, and a plurality of gas holes are evenly formed in the side, located in the cavity, of the gas uniformizing plate. The front replacement gas pipe is arranged on the furnace door of the muffle furnace body in a penetrating mode, one end of the front replacement gas pipe is communicated with the gas cavity, the rear replacement gas pipe is installed on the muffle furnace body, uniform incandescent of the muffle furnace can be achieved, and the detection effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber felt ash content detection technology, and more specifically, to a carbon fiber insulation material carbon felt ash content detection device. Background Technology

[0002] Carbon fiber insulation materials are widely used in the growth of second- and third-generation semiconductor crystals (silicon semiconductors, SiC semiconductors), and also have extensive applications in optical fiber preforms, sapphire crystals, heat treatment, and epitaxial furnaces. The main concerns are the uniformity, purity, and lifespan of the insulation. For purity testing, current technology typically uses the total ash content determination method. The sample used for testing must be ground and pulverized, mixed thoroughly, and then 3-5g is taken and placed in a crucible heated to constant weight. The weight is recorded, and then the crucible is slowly heated in a muffle furnace, taking care to avoid combustion. When complete carbonization is achieved, the temperature is gradually increased to 900℃ to ensure complete carbonization and constant weight. The total ash content in the sample is calculated based on the weight of the residue. The principle is that when the sample comes into contact with oxygen at high temperature, the carbon part reacts with the oxygen in the air to form carbon oxides, which are released as gas. The remaining heavy metal impurities remain in the crucible. The ash content of the sample is represented by the ratio of the residual weight to the weight of the sample itself. The existing muffle furnace does not heat up sufficiently, resulting in a higher ash content in the overall results, which affects the accuracy of the detection. To address the above problems, a solution is proposed below. Utility Model Content

[0003] To address the problems existing in the prior art, the purpose of this utility model is to provide a carbon fiber insulation material carbon felt ash content detection device, which can achieve uniform heating of the muffle furnace and ensure the detection effect.

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] A carbon fiber insulation material carbon felt ash content detection device includes a muffle furnace body. The muffle furnace body has an internal cavity. Several silicon molybdenum rods for heating are symmetrically and evenly arranged inside the cavity. A support plate is installed inside the cavity, and several recesses for placing crucibles are formed on the support plate. Several support legs are connected to the bottom of the support plate. A gas equalization plate is installed at one end of the furnace door of the muffle furnace body, located within the cavity. A gas equalization plate has a gas cavity inside, and several air holes are evenly formed on one side of the gas equalization plate inside the cavity. A front gas replacement pipe passes through the furnace door of the muffle furnace body, and one end of the front gas replacement pipe is connected to the gas cavity. A rear gas replacement pipe is installed on the muffle furnace body.

[0006] Preferably, the pores are arranged in three rows evenly, and the diameter of the pores is 5-10 mm.

[0007] Preferably, a through groove is formed between two adjacent support legs for airflow.

[0008] Preferably, a frame is fixedly installed on the support leg, and a slot is provided inside the frame. The slot is adapted to the support plate, and a supporting piece is provided inside the slot to support the support plate.

[0009] Preferably, the anterior and posterior replacement tracheas are arranged symmetrically.

[0010] Compared with existing technologies, the advantages of this utility model are:

[0011] I. This design, through the use of support plates and legs, allows the crucible to be suspended in the uniform temperature zone inside the muffle furnace, thus enabling more thorough sample purification. By adding front and rear replacement gas pipes, air convection is created within the muffle furnace, ensuring full contact and combustion of the sample with air, thereby improving product purity. The addition of pores ensures stable airflow within the heating zone, further enhancing heat flow and guaranteeing uniform heating.

[0012] Second, the design of the frame, slot and receiving plate allows for the replacement of support plates with different sizes and numbers of notches, thus meeting the needs of crucibles of different sizes and making it widely applicable. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 3 This is a structural schematic diagram of the support leg, frame, and slot of this utility model.

[0016] Explanation of the labels in the diagram:

[0017] 1. Muffle furnace body; 2. Cavity; 3. Silicon molybdenum rod; 4. Support plate; 5. Notch; 6. Support leg; 7. Gas distribution plate; 8. Gas cavity; 9. Gas hole; 10. Front replacement gas pipe; 11. Rear replacement gas pipe; 12. Through groove; 13. Frame; 14. Slot; 15. Receiving plate. Detailed Implementation

[0018] Example 1:

[0019] Please see Figure 1-3A carbon fiber insulation material carbon felt ash content detection device includes a muffle furnace body 1. The muffle furnace body 1 has a cavity 2 inside. Several silicon molybdenum rods 3, which serve to raise the temperature, are symmetrically and evenly arranged inside the cavity 2. Support legs 6 are evenly placed at the bottom of the cavity 2. A through groove 12 is formed between adjacent support legs 6 to facilitate airflow. A rectangular frame 13 is fixedly connected to the support legs 6. A slot 14 is formed on the frame 13. A support plate 4 is arranged inside the slot 14. A receiving piece 15, which is fixedly connected to the frame 13, is provided at the bottom of the support plate 4. The receiving piece 15 supports the support plate 4. The support plate 4 is integrally formed with the legs, frame 13, and support plate 15 to ensure connection strength. The support plate 4 has several recesses 5 evenly distributed on it for placing the crucible. Through the design of the support plate 4 and the support legs 6, the crucible can be suspended in the homogeneous temperature zone inside the muffle furnace body 1, so that the sample purification is more complete. The support plate 4 and the recesses 5 are detachable, so by replacing the support plate 4 with different sizes and numbers of recesses 5, it can be adapted to crucibles of different sizes. At the same time, the legs, frame 13, support plate 4, and support plate 15 are all made of high-purity quartz or ceramic, which has the characteristics of high temperature resistance.

[0020] A gas equalization plate 7 is installed at one end of the cavity 2 of the furnace door of the muffle furnace body 1. A gas equalization plate 7 has a gas chamber 8 inside. A front replacement gas pipe 10 is installed on the furnace door of the muffle furnace body 1. One end of the front replacement gas pipe 10 is connected to the gas chamber 8. Several gas holes 9 are evenly opened on one side of the cavity 2 of the gas equalization plate 7. The gas holes 9 are connected to the cavity 2. The cross-section of the gas holes 9 is circular. The gas holes 9 are arranged in three rows and evenly. The diameter of the gas holes 9 is 5-10mm. A rear replacement gas pipe 11 is installed on the muffle furnace body 1. The front replacement gas pipe 10 and the rear replacement gas pipe 11 are symmetrically arranged. By adding the front replacement gas pipe 10 and the rear replacement gas pipe 11, the internal environment of the muffle furnace body 1 forms front and rear air convection, so that the sample is in full contact with the air, and complete combustion is achieved, thereby improving the purity of the product. By adding the gas holes 9, the airflow in the heating zone can be stabilized, the sample can be in full contact with the air, the heat flow can be improved, and the heating can be uniform.

[0021] Working principle:

[0022] The crucible containing the carbon fiber felt powder sample is placed inside the recess 5. The crucible is suspended in the central area inside the muffle furnace body 1. The furnace door is closed, the temperature is set, and the furnace is heated by starting the silicon molybdenum rod 3. During the heating process, air enters through the front replacement gas pipe 10, enters the gas chamber 8 inside the gas equalization plate 7, and then enters the cavity 2 through the gas hole 9. The design of the through groove 12 can ensure that the airflow contacts the part of the crucible located at the lower end of the support plate 4, so that the sample is purified more thoroughly. Finally, the air will be discharged from the cavity 2 through the rear replacement gas pipe 11 to form air convection, ensuring that the sample is in full contact with the air.

Claims

1. A device for detecting the ash content of carbon fiber insulation material carbon felt, characterized in that: The furnace includes a muffle furnace body (1), which has a cavity (2) inside. Several silicon molybdenum rods (3) for heating are symmetrically and evenly arranged inside the cavity (2). A support plate (4) is arranged inside the cavity (2). Several notches (5) for placing crucibles are opened on the support plate (4). Several support legs (6) for supporting the support plate (4) are connected to the bottom of the support plate (4). A gas equalization plate (7) is installed at one end of the furnace door of the muffle furnace body (1) located in the cavity (2). A gas chamber (8) is opened inside the gas equalization plate (7). Several air holes (9) are evenly opened on one side of the gas equalization plate (7) located inside the cavity (2). A front replacement gas pipe (10) is installed through the furnace door of the muffle furnace body (1). One end of the front replacement gas pipe (10) is connected to the gas chamber (8). A rear replacement gas pipe (11) is installed on the muffle furnace body.

2. The carbon fiber insulation material carbon felt ash content detection device according to claim 1, characterized in that: The air holes (9) are arranged in three rows evenly, and the diameter of the air holes (9) is 5-10 mm.

3. The carbon fiber insulation material carbon felt ash content detection device according to claim 1, characterized in that: A through groove (12) is formed between two adjacent support legs (6) for airflow.

4. The carbon fiber insulation material carbon felt ash content detection device according to claim 1, characterized in that: A frame (13) is fixedly installed on the support leg (6). A slot (14) is provided inside the frame (13). The slot (14) is adapted to the support plate (4). A receiving piece (15) is provided inside the slot (14) to support the support plate (4).

5. The carbon fiber insulation material carbon felt ash content detection device according to claim 1, characterized in that: The front replacement airway (10) and the rear replacement airway (11) are said to be arranged symmetrically.

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