Porcelain boat assembly for high-temperature vapor deposition experiment
By designing a porcelain boat assembly with a screen, the problem of drugs being blown to the wrong porcelain boat by airflow and solid impurities and products being taken away during high-temperature vapor deposition experiments was solved, achieving higher yields and product purity.
Patent Information
- Application Number
- CN202420773663.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In high-temperature vapor-phase deposition experiments, the open design of existing porcelain boats causes the drug to be blown into the wrong porcelain boat by the airflow, affecting the reaction results, and solid impurities and products are easily taken away by the airflow, resulting in a decrease in yield and a decrease in product purity. .
A porcelain boat assembly with a screen is designed, including an upper porcelain boat and a lower porcelain boat. The screen is located on the side wall of the upper porcelain boat, facing the incoming flow direction, allowing gas to enter but blocking solid particles, combined with a limiting mechanism to ensure The storage space is airtight.
It effectively prevents solid impurities and products from being taken away by the gas flow, improves yield and product purity, and ensures the accuracy of reaction results.
Smart Images
Figure CN222374765U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of experimental equipment for high-temperature vapor deposition, in particular to a porcelain boat component required for use in a chemical high-temperature vapor deposition experiment carried out in a tube furnace. Background Art
[0002] When it comes to high-temperature experiments in chemical laboratories, it is often necessary to eliminate the interference of oxygen in the air. At this time, a tubular furnace reaction tube is often used for experiments. High-temperature vapor deposition experiments often refer to placing two chemicals that need to undergo high-temperature reactions in the reaction tube in a tubular furnace, and placing them in two porcelain boats A and B respectively. Porcelain boats A and B are on the left and right sides of the reaction tube close to the heat source. Then, inert gases such as nitrogen and argon are continuously introduced into the tubular furnace to exhaust the air from the reaction tube in the tubular furnace to ensure that an oxygen-free environment is always maintained in the reaction tube. At this time, the nitrogen in the reaction tube continues to flow from the tube mouth to the tube tail.
[0003] During heating, the medicine in porcelain boat A located upstream of the reaction tube generates gas when heated. The gas flowing in the tube is carried to porcelain boat B downstream of the reaction tube, where it reacts with the substance generated by the medicine in porcelain boat B, thereby obtaining the product required for the experiment.
[0004] The above process often has the following problems in actual reaction:
[0005] 1. The existing porcelain boats in the laboratory are often open. Due to the continuous flow of gas in the reaction tube, during the heating process of the tubular furnace, before the reaction temperature is reached, the unreacted solid drugs in porcelain boat A located upstream of the reaction tube are easily blown into porcelain boat B by the airflow, thereby interfering with the reaction results, and the solid products obtained in porcelain boat B are also easily blown away by the airflow, resulting in a decrease in yield.
[0006] 2. After being heated, the chemicals in the porcelain boat A located upstream of the reaction tube will not only produce the gases required for the reaction, but also some solid impurities such as residual carbon. The solid impurities will also be brought into the porcelain boat B downstream of the reaction tube along with the flow of gas in the reaction tube, which will affect the purity of the final reactants and interfere with the test.
[0007] In general, in the existing experimental process, impurities are easily mixed into the downstream porcelain boat storing the reaction products, and the reaction products are easily carried away by the airflow, resulting in inaccurate experimental results.
[0008] Based on the above problems, the inventors have conducted in-depth research on the gas deposition experiments and porcelain boat structures in the tubular furnace reaction tube, fully considering the entire experimental process, in the hope of designing a new porcelain boat assembly for high-temperature gas deposition experiments that can solve the above problems. Utility Model Content
[0009] In order to overcome the above-mentioned problems, the inventors have conducted intensive research and designed a porcelain boat assembly for high-temperature vapor deposition experiments, the porcelain boat assembly comprising an upper porcelain boat and a lower porcelain boat, which are buckled together to form a storage space for loading a reactant and storing reaction products, a screen is arranged on the side wall of the upper porcelain boat facing the incoming flow direction, the screen allows gas to enter the storage space and blocks solid particles from entering and exiting the storage space, such a storage space with a screen can not only meet the requirements of full contact between multiple gases undergoing the reaction, but also meet the requirements of solid products not being contaminated and lost, a limiting mechanism is arranged on the end faces of the upper porcelain boat and the lower porcelain boat where they contact each other, to ensure that the storage space is stable and airtight, thereby completing the utility model.
[0010] Specifically, the purpose of the utility model is to provide a porcelain boat assembly for high temperature vapor deposition experiments, the porcelain boat assembly comprising an upper porcelain boat 1 and a lower porcelain boat 2.
[0011] When working in the tubular furnace reaction tube 5, the lower porcelain boat 2 is placed with its opening facing upward, and the upper porcelain boat 1 is buckled on the lower porcelain boat 2 with its opening facing downward; a storage space is formed between the upper porcelain boat 1 and the lower porcelain boat 2;
[0012] A limiting mechanism is provided on the end surfaces where the lower porcelain boat 2 and the upper porcelain boat 1 contact each other, and the limiting mechanism is used to prevent the upper porcelain boat 1 and the lower porcelain boat 2 from moving relative to each other in the horizontal direction, so that the storage space remains sealed;
[0013] A screen 3 is provided at the side wall of the porcelain boat 1, and the screen 3 faces the incoming flow direction; the screen 3 allows gas to enter the storage space and blocks solid particles from entering or leaving the storage space.
[0014] A screen slot 4 is provided on the side wall of the porcelain loading boat 1 , and the screen 3 is detachably inserted into the screen slot 4 .
[0015] There are multiple sieves 3 with different mesh sizes. The sieve 3 with corresponding mesh size is selected according to the size of product particles in the storage space and installed in the sieve slot 4.
[0016] Among them, the length dimension of the screen 3 is larger than the length dimension of the side wall of the porcelain boat 1 on which the screen 3 is provided, that is, one end of the screen cannot be inserted into the mesh slot 4 but is exposed outside the porcelain boat 1, so as to facilitate the disassembly and replacement of the screen 3.
[0017] When working in the tubular furnace reaction tube 5, the angle formed between the side wall of the porcelain boat 1 facing the incoming flow direction and the screen 3 and the horizontal plane is 60 to 75 degrees.
[0018] Wherein, the limiting mechanism comprises a slide rail 11 arranged on the upper porcelain boat 1 and a slide groove 21 arranged on the lower porcelain boat 2;
[0019] The slide rail 11 and the slide groove 21 are arranged along the incoming flow direction;
[0020] After the slide rail 11 is embedded in the slide groove 21 , the upper porcelain boat 1 can slide back and forth on the lower porcelain boat 2 along the incoming flow direction, thereby closing the storage space or separating the upper porcelain boat 1 from the lower porcelain boat 2 .
[0021] The limiting mechanism further includes a stopper 22 arranged on the lower porcelain boat 2 away from the screen 3, and the stopper 22 provides a limit for the upper porcelain boat 1. When the upper porcelain boat 1 abuts against the stopper 22, the storage space is in a closed state.
[0022] The beneficial effects of the utility model include:
[0023] (1) According to the porcelain boat assembly for high-temperature vapor deposition experiments provided by the utility model, when the porcelain boat assembly is placed in a tubular furnace reaction tube for a high-temperature vapor deposition experiment, when the gas and solid impurity particles generated by the heat reaction of the medicine in the porcelain boat located upstream of the reaction tube arrive at the porcelain boat assembly located downstream of the reaction tube along with the airflow in the reaction tube, since a screen is provided on the upper porcelain boat of the porcelain boat assembly, the solid impurity particles can be intercepted outside the porcelain boat assembly, and only the gas is allowed to enter the porcelain boat assembly, i.e., the storage space, to react with the deposited medicine, thereby ensuring the purity of the product;
[0024] (2) According to the porcelain boat assembly for high temperature vapor deposition experiments provided by the utility model, since a drug participating in the reaction is stored in the lower porcelain boat, the drug will not be blown away by the airflow in the reaction tube at the initial stage of the reaction under the protection of the upper porcelain boat, which can improve the yield;
[0025] (3) According to the porcelain boat assembly for high-temperature vapor deposition experiments provided by the utility model, since the upper porcelain boat and the lower porcelain boat constitute a storage space, the solid products produced by the reaction in the storage space will not be carried out of the storage space by the airflow, ensuring that the products will not be lost. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A schematic diagram showing the structure of a porcelain boat assembly for high temperature vapor deposition experiment provided by the utility model when working in a tubular furnace reaction tube;
[0027] Figure 2 A schematic diagram showing the structure of an upper porcelain boat in a porcelain boat assembly for high temperature vapor deposition experiments provided by the utility model is shown;
[0028] Figure 3 The schematic diagram of the structure of the lower porcelain boat in the porcelain boat assembly for high temperature vapor deposition experiment provided by the utility model is shown.
[0029] Description of Figure Numbers:
[0030] 1-Porcelain boat
[0031] 11-Slide rail
[0032] 2-Down the Porcelain Boat
[0033] 21-Chute
[0034] 22-Block
[0035] 3-Sieve
[0036] 4-Screen slot
[0037] 5-Tube furnace reaction tube
[0038] 6-Conventional general purpose porcelain boat
[0039] 7-Deposited drugs DETAILED DESCRIPTION
[0040] The utility model is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the utility model will become clearer and more specific.
[0041] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.
[0042] According to the utility model, a porcelain boat assembly for high temperature vapor deposition experiment is provided. Figure 1 , Figure 2 and Figure 3 As shown in , the porcelain boat assembly group includes an upper porcelain boat 1 and a lower porcelain boat 2;
[0043] When working in the tubular furnace reaction tube 5, the lower porcelain boat 2 is placed with its opening facing upward, and the upper porcelain boat 1 is buckled on the lower porcelain boat 2 with its opening facing downward; a storage space is formed between the upper porcelain boat 1 and the lower porcelain boat 2; if only one porcelain boat is set here, a cover plate is optionally placed on the ordinary porcelain boat, and the cover plate is permeable to gas but not to solid; because the cover net is horizontally covered on the porcelain boat, most of the reaction gases generated in the upstream porcelain boat will flow directly over the top of the reaction porcelain boat under the drive of the high-speed airflow in the tube, and cannot enter the interior of the porcelain boat to fully react with the drugs to be reacted. In the above scheme of the present application, two porcelain boats are selected to be buckled and placed, and placing a cover net on the side will increase the amount of reaction gas entering, and form a larger storage space so that the drugs to be reacted inside the porcelain boat are more easily affected by the airflow and lifted up in the porcelain boat to fully contact with the reaction gas. Thereby achieving the best reaction effect.
[0044] A limiting mechanism is arranged on the end faces where the lower porcelain boat 2 and the upper porcelain boat 1 contact each other, and the limiting mechanism prevents the upper porcelain boat 1 and the lower porcelain boat 2 from moving relative to each other in the horizontal direction, so that the storage space remains closed; the length and width of the upper porcelain boat 1 and the lower porcelain boat 2 are basically the same, and the walls of the upper porcelain boat 1 and the lower porcelain boat 2 are relatively thick, generally 1-2 cm, and can fully contact each other when buckled together, so that the formed storage space is relatively stable and can withstand the continuous impact of airflow.
[0045] A screen 3 is provided at the side wall of the porcelain boat 1, and the screen 3 faces the incoming flow direction; the screen 3 allows gas to enter the storage space and blocks solid particles from entering or leaving the storage space.
[0046] The overall appearance of the upper porcelain boat in the present application can be similar to that of a traditional ordinary porcelain boat, with the only difference being the addition of a limiting mechanism and a screen-related structure; the overall appearance of the lower porcelain boat in the present application is also similar to that of a traditional ordinary porcelain boat, with the only difference being the addition of a limiting mechanism; such an appearance design allows users who are accustomed to traditional porcelain boats to quickly get started operating the porcelain boat assembly for experiments, and is also convenient for use in conjunction with traditional ordinary porcelain boats.
[0047] In a preferred real-time approach, such as Figure 2 As shown in FIG. 1 , a screen slot 4 is provided at the side wall of the porcelain loading boat 1 , and the screen 3 is detachably inserted in the screen slot 4 .
[0048] There are multiple sieves 3, and the mesh apertures are different from each other. The sieves 3 with corresponding mesh apertures are selected according to the size of the product particles in the storage space, and installed in the sieve slots 4. In the present application, the mesh aperture of the sieve 3 is 100nm to 500nm; preferably, the sieve 3 is divided into four types according to the mesh aperture, and the corresponding mesh sizes are 100nm, 200nm, 300nm, and 500nm, respectively. The mesh size is marked on each sieve 3 accordingly to facilitate quick confirmation and replacement.
[0049] In the present application, by setting the above four specifications of screens and selecting and installing them according to the product type, a screen with a mesh size as large as possible can be selected to minimize the obstruction of the screen to the interaction of the reaction gases and improve the reaction efficiency.
[0050] Preferably, the length of the screen 3 is greater than the length of the side wall of the porcelain boat 1 provided with the screen 3, that is, one end of the screen cannot be inserted into the screen slot 4 but is exposed outside the porcelain boat 1, so as to facilitate the removal and replacement of the screen 3. The user can pull the screen 3 out of the screen slot 4 by clamping the part of the screen exposed outside the porcelain boat 1.
[0051] Preferably, when working in the tubular furnace reaction tube 5, the angle formed between the side wall of the upper porcelain boat 1 facing the incoming flow direction and the screen 3 and the horizontal plane is 60 to 75 degrees. The inventors have found that when the above-mentioned angle is set to 60 to 75, the process of the gas participating in the reaction entering the storage space is the smoothest, the reaction gas is in the most complete contact with the medicine in the porcelain boat, and the reaction efficiency is the highest. At the same time, there are fewer impurities remaining on the screen placed at this angle, and most impurities fall off by themselves due to gravity and airflow, and do not block the screen, which is conducive to the reaction gas entering the porcelain boat.
[0052] In a preferred embodiment, the limiting mechanism includes a slide rail 11 provided on the upper porcelain boat 1 and a slide groove 21 provided on the lower porcelain boat 2;
[0053] The slide rail 11 and the slide groove 21 are arranged along the incoming flow direction;
[0054] After the slide rail 11 is embedded in the slide groove 21, the upper porcelain boat 1 can slide back and forth on the lower porcelain boat 2 along the incoming flow direction, thereby closing the storage space or separating the upper porcelain boat 1 from the lower porcelain boat 2. Specifically, when the upper porcelain boat 1 is buckled on the lower porcelain boat 2 with its opening facing downward, and the lower porcelain boat is placed in the tubular furnace reaction tube 5, the upper porcelain boat can be pulled toward the incoming flow direction until the upper porcelain boat 1 and the lower porcelain boat 2 are separated from each other.
[0055] Preferably, two rails 11 and two slide grooves 21 are provided, respectively located on both sides of the porcelain boat.
[0056] Preferably, the limiting mechanism further comprises a stopper 22 arranged on the side of the lower porcelain boat 2 away from the screen 3, and the stopper 22 provides limiting for the upper porcelain boat 1. When the upper porcelain boat 1 abuts against the stopper 22, the storage space is in a closed state.
[0057] In a preferred embodiment, Figure 1 As shown in; when the high temperature vapor deposition experiment porcelain boat assembly is actually used to perform a high temperature vapor deposition experiment, an ordinary porcelain boat 6 is placed upstream of the tubular furnace reaction tube 5, in which a reactant is contained, and the porcelain boat assembly is placed downstream of the tubular furnace reaction tube 5, and the upper porcelain boat 1 is buckled on the lower porcelain boat 2 with the opening facing downward, and another reactant is contained in the lower porcelain boat 2; after the experiment begins, an inert gas for preventing interference is introduced, and the heating resistor wire of the tubular furnace is started to heat up. After reaching the reaction temperature, gas and solid impurity particles begin to be generated in the ordinary porcelain boat 6, and as the gas in the tubular furnace reaction tube 5 flows and blows onto the porcelain boat assembly downstream of the tubular furnace reaction tube 5, the gas passes through the screen 3 into the storage space, contacts with the deposited medicine, and reacts, and the solid impurity particles are intercepted by the screen 3 outside the storage space. After the reaction is completed, the porcelain boat assembly is taken out, the upper porcelain boat 1 is pushed and slid open, and the product 7 is taken out; thereby obtaining a high-purity reaction product, and the experimental results are more accurate.
[0058] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front" and "back" etc. indicate directions or positional relationships based on the directions or positional relationships in the working state of the present invention, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0059] The present invention has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, the present invention may be subjected to a variety of substitutions and improvements, all of which fall within the scope of protection of the present invention.
Claims
1. A porcelain boat assembly for high temperature vapor deposition experiments, characterized in that: The porcelain boat assembly comprises an upper porcelain boat (1) and a lower porcelain boat (2). When working in the tubular furnace reaction tube (5), the lower porcelain boat (2) is placed with its opening facing upward, and the upper porcelain boat (1) is buckled on the lower porcelain boat (2) with its opening facing downward; a storage space is formed between the upper porcelain boat (1) and the lower porcelain boat (2); A limiting mechanism is provided on the end surfaces where the lower porcelain boat (2) and the upper porcelain boat (1) contact each other, and the limiting mechanism is used to prevent the upper porcelain boat (1) and the lower porcelain boat (2) from moving relative to each other in the horizontal direction, so that the storage space remains sealed; A screen (3) is arranged on the side wall of the porcelain boat (1), and the screen (3) faces the incoming flow direction; the screen (3) allows gas to enter the storage space and blocks solid particles from entering or leaving the storage space.
2. The porcelain boat assembly for high temperature vapor deposition experiment according to claim 1, characterized in that: A screen slot (4) is provided on the side wall of the porcelain loading boat (1), and the screen (3) is detachably inserted into the screen slot (4).
3. The porcelain boat assembly for high temperature vapor deposition experiment according to claim 2, characterized in that: There are a plurality of sieves (3) with different mesh apertures. A sieve (3) with a corresponding mesh aperture is selected according to the size of product particles in the storage space and installed in the sieve slot (4).
4. The porcelain boat assembly for high temperature vapor deposition experiment according to claim 2, characterized in that: The length of the screen (3) is greater than the length of the side wall of the porcelain boat (1) on which the screen (3) is provided, that is, one end of the screen cannot be inserted into the mesh slot (4) but is exposed outside the porcelain boat (1), so as to facilitate the removal and replacement of the screen (3).
5. The porcelain boat assembly for high temperature vapor deposition experiment according to claim 1, characterized in that: When working in the tubular furnace reaction tube (5), the angle formed between the side wall of the porcelain boat (1) facing the incoming flow direction and the screen (3) and the horizontal plane is 60 to 75 degrees.
6. The porcelain boat assembly for high temperature vapor deposition experiment according to claim 1, characterized in that: The limiting mechanism comprises a slide rail (11) arranged on the upper porcelain boat (1) and a slide groove (21) arranged on the lower porcelain boat (2); The slide rail (11) and the slide groove (21) are both arranged along the incoming flow direction; After the slide rail (11) is embedded in the slide groove (21), the upper porcelain boat (1) can slide back and forth on the lower porcelain boat (2) along the incoming flow direction, thereby closing the storage space or separating the upper porcelain boat (1) from the lower porcelain boat (2).
7. The porcelain boat assembly for high temperature vapor deposition experiment according to claim 6, characterized in that: The limiting mechanism also includes a stopper (22) arranged on the side of the lower porcelain boat (2) away from the screen (3), and the stopper (22) provides a limit for the upper porcelain boat (1). When the upper porcelain boat (1) abuts against the stopper (22), the storage space is in a closed state.