Self-propagating combustion synthesis equipment with forward high-pressure driving
By introducing resistance heating and positive high-pressure drive into the self-propagating combustion synthesis device, the shortcomings of traditional devices in igniting low-exothermic reaction systems and constructing high-pressure environments are solved, achieving more efficient reactant activation and combustion synthesis.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional self-propagating combustion synthesis equipment is difficult to ignite low-exothermic reaction systems such as silicon carbide, silicon nitride, and boron carbide, and it is also difficult to construct a flexible reaction environment under high pressure, which limits the types of materials and performance optimization.
The self-propagating combustion synthesis equipment employs resistance heating and positive high-pressure drive. Through the resistance heater and positive high-pressure drive device, it provides a uniform heating and high-pressure reaction environment, ensuring the full mixing and diffusion of the reactants.
It improves the activation efficiency of reactants and the efficiency of combustion synthesis, expands the application scope of self-propagating combustion synthesis technology, and facilitates the smooth progress of difficult reactions.
Smart Images
Figure CN224136395U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a self-propagating combustion synthesis device, specifically a self-propagating combustion synthesis device with positive high-pressure drive. Background Technology
[0002] Self-propagating combustion synthesis is a technique for preparing materials based on the principle of exothermic reactions between reactants. This technique uses a small amount of externally introduced energy to trigger a localized reaction in a highly exothermic system, thereby forming a combustion wave. Subsequently, the heat released by the reaction itself propels the reaction of adjacent materials until the entire process is complete, requiring almost no external continuous energy supply. This synthesis technique has significant advantages such as rapid reaction and low cost, making it one of the key processes for preparing high-performance ceramic powder materials.
[0003] However, traditional self-propagating combustion synthesis equipment still has some shortcomings. Regarding ignition, for certain special materials or low-reactivity feedstock systems, conventional equipment often struggles to successfully ignite the reaction using only conventional external ignition methods. Especially when processing low-exothermic reaction systems such as silicon carbide (SiC), silicon nitride (Si3N4), and boron carbide (B4C), heat is difficult to distribute evenly throughout the system, meaning that areas far from the initial ignition point may not reach the ideal reaction temperature, thus affecting the completeness of the reaction. Furthermore, for reaction systems requiring high pressure conditions to achieve high yields, traditional equipment struggles to flexibly construct the necessary high-pressure reaction environment according to the specific needs of material synthesis. This significantly limits the types of synthesizable materials and the optimization space for their properties.
[0004] In view of this, the present invention provides a self-propagating combustion synthesis device with dual drive of resistance heating and positive high pressure. By adding resistance heating drive and positive high pressure drive functions, the problem of difficulty in ignition and low heating efficiency in the synthesis of certain materials in traditional self-propagating combustion synthesis devices is solved, thereby improving the efficiency and success rate of combustion synthesis. Utility Model Content
[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a self-propagating combustion synthesis device with positive high-pressure drive, including a furnace body and a furnace cover, wherein an igniter, a resistance heater, and a positive high-pressure drive device are provided in the furnace body; the furnace body includes an inner furnace body and an outer furnace body sleeved on the outside of the inner furnace body, and an interlayer chamber is formed between the outer wall of the inner furnace body and the inner wall of the outer furnace body; the positive high-pressure drive device includes an air inlet valve and a positive pressure drive air inlet pipe disposed on the outer furnace body and communicating with the interlayer chamber, and a vacuum valve and an air outlet valve communicating with the inner furnace body.
[0006] Preferably, a reaction chamber is provided at the bottom of the furnace body, the resistance heater includes a resistance heating coil disposed in the reaction chamber, a heating platform is provided at the top of the reaction chamber, an ignition device is provided at the top of the heating platform, and an ignition electrode is disposed in the ignition device.
[0007] Preferably, an ignition device protective cover is provided on the outer side of the reaction chamber.
[0008] Preferably, an observation window is provided on the side wall of the inner furnace body, and an observation pipe corresponding to the observation window is provided on the side wall of the outer furnace body.
[0009] Preferably, the furnace cover is connected to the furnace body by bolts, and a sealing ring is provided at the connection between the furnace cover and the furnace body.
[0010] Preferably, the positive pressure drive intake pipe is connected to an external high-pressure gas source and a pressure sensor.
[0011] Preferably, the resistance heating coil is connected to an external power supply and temperature controller.
[0012] The advantages of this invention compared with the prior art are as follows: This invention can effectively improve the activation efficiency of reactants and the overall efficiency of combustion synthesis, provide the specific atmospheric environment required for the reaction, strongly promote the mixing and diffusion of reactants, increase the effective collision frequency between reactants, and enable reactions that were originally difficult to carry out to proceed smoothly, thus expanding the practicality of self-propagating combustion synthesis technology. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of a self-propagating combustion synthesis device with positive high-pressure drive according to this utility model. Detailed Implementation
[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0015] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0016] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0017] In the description of the embodiments of this utility model, "a plurality of" means at least two.
[0018] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0019] Example:
[0020] A self-propagating combustion synthesis device with positive high-pressure drive includes a furnace body 1 and a furnace cover 2. The furnace body 1 is equipped with an igniter 3, a resistance heater 4, and a positive high-pressure drive device 5. The furnace body 1 includes an inner furnace body 101 and an outer furnace body 102 sleeved on the outside of the inner furnace body 101. A partition chamber 103 is formed between the outer wall of the inner furnace body 101 and the inner wall of the outer furnace body 1. The positive high-pressure drive device 5 includes an inlet valve 501 and a positive pressure drive inlet pipe 502 disposed on the outer furnace body 102 and communicating with the partition chamber, as well as a vacuum valve 503 and an outlet valve 504 communicating with the inner furnace body 101. The positive pressure drive inlet pipe 5 is connected to an external high-pressure gas source and a pressure sensor. The igniter 3 is connected to an external ignition controller. The resistance heater 4 is connected to an external power supply and temperature controller.
[0021] A reaction chamber 6 is provided at the bottom of the furnace body 1. The resistance heater 4 includes a resistance heating coil 401 disposed in the reaction chamber 6. The resistance heating coil 401 is connected to an external power supply and temperature controller. A heating platform 7 is provided at the top of the reaction chamber 6. An ignition device 3 is provided at the top of the heating platform 7. An ignition electrode 301 is provided in the ignition device. In this embodiment, molybdenum wire ignition is used. An ignition device protective sleeve 8 is provided on the outside of the reaction chamber 6.
[0022] An observation window 9 is provided on the side wall of the inner furnace body 101, and an observation pipe 10 corresponding to the observation window 9 is provided on the side wall of the outer furnace body 1; the furnace cover 2 is connected to the furnace body 1 by bolts, and a sealing ring is provided at the connection between the furnace cover 2 and the furnace body 1.
[0023] In this embodiment, the furnace body is made of high-strength, high-temperature resistant, and high-pressure resistant alloy steel. A well-sealed furnace cover is installed on the top of the furnace body. The igniter uses an electric spark ignition device. The igniter is connected to an external ignition controller to control the ignition time and energy. The ignition electrode is made of a high-melting-point, oxidation-resistant metal material to ensure reliable ignition of the reactants under high-temperature and high-pressure conditions, initiating a self-propagating combustion synthesis reaction. The resistance heater consists of a high-resistance, high-temperature resistant alloy heating wire, electrodes, and a temperature control system. The heating wire is evenly arranged around the reaction chamber, enabling rapid heating to the required temperature and facilitating the initiation of the self-propagating combustion reaction. The resistance heating wire is connected to an external power supply and temperature controller. The temperature controller precisely controls the heating power of the resistance heating wire, effectively improving the problem of insufficient initial temperature in traditional self-propagating combustion synthesis devices.
[0024] The positive high-pressure drive unit is connected to an external high-pressure gas source, which can provide a variety of inert or reactive gases to meet the atmospheric requirements of different material synthesis reactions. The pressure sensor is connected between the high-pressure gas source and the gas inlet of the reaction chamber. The gas pressure introduced into the reaction vessel is precisely controlled by the signal fed back by the pressure sensor.
[0025] When using this equipment for self-propagating combustion synthesis, add the reactants into the reaction chamber through the feed inlet, close the sealing cap, and ensure the container is well sealed. Start the resistance heater to preheat the materials in the reaction container. According to the requirements of the synthesis reaction, introduce an appropriate amount of high-pressure gas into the furnace through an external high-pressure gas source. After the materials are preheated and the reaction atmosphere and pressure are adjusted, turn off the resistance heater and start the ignition device through the igniter to generate an electric spark to ignite the reactants, thus initiating the self-propagating combustion synthesis reaction. After the self-propagating combustion synthesis reaction is completed, stop the operation of the forward high-pressure drive device. After the reaction container cools to room temperature, open the sealing cap and remove the synthesized product.
[0026] This invention can effectively improve the activation efficiency of reactants and the overall efficiency of combustion synthesis, provide the specific atmospheric environment required for the reaction, strongly promote the mixing and diffusion of reactants, increase the effective collision frequency between reactants, and enable reactions that were originally difficult to carry out to proceed smoothly, thus expanding the practicality of self-propagating combustion synthesis technology.
[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A self-propagating combustion synthesis apparatus with forward high voltage drive, characterized by, The furnace includes a furnace body and a furnace cover. The furnace body is equipped with an igniter, a resistance heater, and a positive high-pressure drive device. The furnace body includes an inner furnace body and an outer furnace body sleeved on the outside of the inner furnace body. An interlayer chamber is formed between the outer wall of the inner furnace body and the inner wall of the outer furnace body. The positive high-pressure drive device includes an air inlet valve and a positive pressure drive air inlet pipe disposed on the outer furnace body and communicating with the interlayer chamber, as well as a vacuum valve and an air outlet valve communicating with the inner furnace body.
2. A self-propagating combustion synthesis apparatus with forward high voltage drive according to claim 1, characterized in that, A reaction chamber is provided at the bottom of the furnace body. The resistance heater includes a resistance heating coil disposed in the reaction chamber. A heating platform is provided at the top of the reaction chamber. An ignition device is provided at the top of the heating platform, and an ignition electrode is disposed in the ignition device.
3. The self-propagating combustion synthesis device with positive high-pressure drive according to claim 2, characterized in that, The outer side of the reaction chamber is equipped with a protective cover for the ignition device.
4. A self-propagating combustion synthesis apparatus with forward high voltage drive according to claim 1, characterized in that, An observation window is provided on the side wall of the inner furnace body, and an observation pipe corresponding to the observation window is provided on the side wall of the outer furnace body.
5. A self-propagating combustion synthesis apparatus with forward high voltage drive according to claim 1, characterized in that, The furnace cover is connected to the furnace body by bolts, and a sealing ring is provided at the connection between the furnace cover and the furnace body.
6. A self-propagating combustion synthesis apparatus with forward high voltage drive according to claim 1, characterized in that, The positive pressure drive intake pipe is connected to an external high-pressure gas source and a pressure sensor.
7. A self-propagating combustion synthesis apparatus with forward high voltage drive according to claim 2, characterized in that, The resistance heating coil is connected to an external power supply and temperature controller.