Energetic material for gas explosion energetic electron ignition module

Abstract

The invention relates to the technical field of gas explosion, and particularly discloses an energetic material for a gas explosion energetic electron ignition module. The invention discloses an energetic material for a gas explosion energetic electron ignition module. The energetic material comprises the following raw materials: Al powder, Ni powder, a compound oxidant, a binder and liquid ethane, the compound oxidizing agent is a compound formed by mixing nano molybdenum trioxide and polytetrafluoroethylene. The obtained energetic material is integrated in an ignition resistor of an energetic electronic ignition module, the function of directly igniting an initiating explosive without ignition powder is achieved, the situation that workers face potential safety hazards in the operation process is avoided, the ignition process is not prone to being affected by temperature, humidity and other environmental factors, and circulation and safety are improved. The triggering success rate of the energetic electronic ignition module is 100%, the reaction threshold value and the ignition delay time are 4000 s and 19.00 ms respectively, the triggering success rate and the response speed of the electronic ignition module are improved, the combustion heat reaches 9912 KJ / kg, and high combustion performance is achieved.

Description

Technical Field

[0001] This application relates to the field of gas blasting technology, and more specifically, to an energetic material for a gas blasting energetic electronic ignition module. Background Technology

[0002] Gas blasting is a novel blasting technology that uses special gases as the blasting medium. High-pressure gas is released into holes or fissures, and the resulting shock wave is used to break or demolish rocks and soil. Compared to traditional explosive blasting techniques, gas blasting technology has many unique advantages, such as safety, environmental friendliness, high efficiency, and flexibility.

[0003] Traditional electronic ignition modules often use lead azide as the ignition element. However, this ignition agent is susceptible to changes in sensitivity due to environmental factors such as temperature and humidity. These changes can lead to risks such as misfires or accidental detonation during operation. Therefore, there is an urgent need to develop an energetic material that is less affected by environmental factors like temperature and humidity during the ignition process and poses fewer safety hazards during production. Summary of the Invention

[0004] In order to reduce the impact of environmental factors such as temperature and humidity on the ignition process, significantly reduce safety hazards in the production process, and improve the triggering success rate and response speed of the gas explosion energetic electronic ignition module, this application provides an energetic material for the gas explosion energetic electronic ignition module.

[0005] In a first aspect, this application provides an energetic material for a gas explosion energetic electronic ignition module, which adopts the following technical solution: An energetic material for a gas-explosive energetic electronic ignition module comprises the following raw materials in the following mass percentages: 15-25% Al powder, 5-15% Ni powder, 60-80% metal oxidant, 0.6-0.8% binder, and 0.2-0.5% liquid ethane.

[0006] By adopting the above technical solution, a composite of Al and Ni powder is selected as the metal powder. Al powder, as a highly active metal fuel, plays a major role in energy release. A dense Al₂O₃ passivation film easily forms on the surface of pure Al powder. Adding Ni powder, upon contact with Al powder, forms an Al-Ni eutectic alloy. This eutectic reaction melts and destroys the Al₂O₃ passivation film on the Al powder surface, exposing the fresh, active surface of the Al powder, significantly reducing ignition difficulty. Furthermore, Ni powder catalyzes the oxidation of Al powder, increasing the combustion rate, detonation velocity, and energy release efficiency of the energetic material. Mixing Al and Ni powder in inert liquid ethane prevents the metal powder from exploding. Adding a trace amount of binder for granulation improves the charge density and mechanical strength.

[0007] The compound oxidant is a mixture of nano-molybdenum trioxide and micron- or submicron-sized polytetrafluoroethylene. Nano-molybdenum trioxide, as the main oxidant, decomposes at high temperatures to release oxygen and undergoes a vigorous aluminothermic reaction with nano-Al powder. This reaction generates significantly more heat than the reaction between Al powder and ammonium perchlorate, rapidly raising the system temperature to over 2000℃ and enhancing the peak gas explosion pressure. Furthermore, in the initial stage of the reaction, nano-molybdenum trioxide reacts with Al powder to form the intermediate product Al2(MoO4)3. This product lowers the energy barrier that breaks the oxide film on the Al powder surface, allowing the active aluminum core of the Al powder to participate in the reaction more quickly. Simultaneously, the resulting elemental molybdenum can form a Ni-Mo alloy with Ni powder, further enhancing the catalytic effect on Al powder oxidation and thus shortening the ignition delay time.

[0008] The addition of polytetrafluoroethylene (PTFE) as an auxiliary oxidant can release fluorine free radicals in advance to trigger the pre-reaction of Al powder, providing an initial heat source for the aluminothermic reaction of nano-molybdenum trioxide, and lowering the overall ignition threshold of the system. PTFE is responsible for rapid oxidation in the low-temperature stage, while nano-molybdenum trioxide is responsible for continuous exothermic reaction in the high-temperature stage, effectively avoiding the problems of ignition delay or reaction interruption that exist with single oxidants. It can also accelerate the active participation of Al powder in the reaction and improve ignition sensitivity. In addition, PTFE can also be added as a gas generator, thermally decomposing to generate fluorine-containing gases such as tetrafluoroethylene and hexafluoropropylene, directly increasing the volume of gaseous products in the system, significantly increasing the peak gas explosion pressure, and improving the triggering success rate and response speed of the ignition module.

[0009] Using micron- or submicron-sized PTFE particles avoids premature decomposition and gas production, preventing the heat from the subsequent main reaction from being effectively converted into gas explosion pressure. If PTFE particles are too small, they are prone to agglomeration, and the decomposition reaction within these agglomerates can trigger localized deflagration, damaging the material structure. If PTFE particles are too large, their thermal decomposition rate is slow, exceeding 500℃. This lags behind the heat released by the main reaction between Al powder and nano-molybdenum trioxide, which has already partially dissipated, preventing PTFE from fully participating in the reaction. Consequently, PTFE cannot play its auxiliary oxidation role or effectively supplement gas production, leading to a significant drop in the peak gas explosion pressure. In contrast, micron- and submicron-sized PTFE particles have a stable thermal decomposition temperature of 420-450℃, matching the main reaction initiation temperature. This achieves a synergistic process of exothermic reaction between Al powder and molybdenum trioxide, PTFE decomposition and oxidation, and simultaneous gas production, maximizing energy utilization.

[0010] The energetic materials prepared using the above formula are not affected by environmental factors such as temperature and humidity, which significantly reduces safety hazards in the production process and ensures the success rate and response speed of the gas explosion energetic electronic ignition module.

[0011] Preferably, the particle size of both the Al powder and the Ni powder is 40-50 nm.

[0012] By adopting the above scheme, the particle size of Al and Ni powder is controlled at 40-50 nm, which is more conducive to the contact between Al and Ni powder and metal oxidants and liquid ethane, increasing the reaction sites for redox reactions and improving the reaction rate and energy release efficiency. In addition, the catalytic activity of nano-aluminum powder is much higher than that of micron-sized aluminum powder, which can enable energetic materials to trigger reactions at lower ignition voltages and shorter ignition times. Furthermore, the ignition temperature of micron-sized Al powder is about 660℃, while that of nano-Al powder can be reduced to below 400℃, resulting in a lower ignition temperature. Combined with the catalytic effect of nano-Ni powder, this effectively solves the ignition delay problem of micron-sized powders and improves the response speed and reliability of the electronic ignition module.

[0013] Preferably, the mass ratio of the polytetrafluoroethylene to the nano molybdenum trioxide is 1:(4-6).

[0014] By adopting the above technical solution and controlling the mass ratio of nano-molybdenum trioxide to polytetrafluoroethylene, the triggering success rate and response speed of the ignition module can be further improved.

[0015] Preferably, the nano-molybdenum trioxide is prepared by modification, and the specific steps are as follows: tridecafluorooctyltrimethoxysilane is added to anhydrous ethanol to obtain a mixture, the mixture is evenly sprayed onto the surface of dried nano-molybdenum trioxide, stirred at 500-700 r / min for 10 min for aging, dried at 80℃ for 1 h, and pulverized to obtain modified nano-molybdenum trioxide; the volume ratio of tridecafluorooctyltrimethoxysilane to anhydrous ethanol is 1:(9-11).

[0016] By adopting the above technical solution, the dried nano-molybdenum trioxide is modified with tridecafluorooctyltrimethoxysilane, which can effectively prevent the agglomeration of nano-molybdenum trioxide and improve the compatibility between nano-molybdenum trioxide and polytetrafluoroethylene, thereby further improving the triggering success rate and response speed of the ignition module.

[0017] Preferably, the amount of the added tridecafluorooctyltrimethoxysilane is 0.5-1% of the mass of the nano molybdenum trioxide.

[0018] By adopting the above technical solution, the amount of tridecafluorooctyltrimethoxysilane added is controlled to ensure the modification effect of nano molybdenum trioxide, thereby further improving the compatibility between nano molybdenum trioxide and polytetrafluoroethylene, and thus further improving the triggering success rate and response speed of the ignition module.

[0019] Preferably, the specific drying conditions for the nano-molybdenum trioxide are: vacuum drying at 100℃±5℃ and -0.08~-0.09MPa until the moisture content of the nano-molybdenum trioxide is ≤0.03%.

[0020] By adopting the above technical solution, the nano-molybdenum trioxide is dried before modification to remove adsorbed and free water on the surface, providing a clean and active surface, enabling directional grafting of fluorosilanes, providing grafting sites for fluorosilanes, improving the modification effect of nano-molybdenum trioxide, thereby improving the compatibility of nano-molybdenum trioxide with polytetrafluoroethylene, and thus improving the triggering success rate and response speed of the ignition module.

[0021] Preferably, the adhesive is polyvinylidene fluoride.

[0022] By adopting the above technical solution, polyvinylidene fluoride (PVDF) is selected as the binder. PVDF can not only be used as a binder, but it is also chemically stable at room temperature and can slowly decompose into small molecule fluorine-containing gas at high temperatures, which helps to increase the gas explosion pressure, improve the triggering success rate and response speed of the ignition module, and the decomposition products of PVDF are non-corrosive and will not contaminate the ignition module shell.

[0023] Secondly, this application provides a method for preparing energetic materials for any of the above-mentioned gas explosion energetic electronic ignition modules, specifically achieved through the following technical solution: A method for preparing an energetic material for a gas explosion energetic electronic ignition module includes the following steps: Al powder and Ni powder are mixed evenly, other raw materials are added, and the mixture is pressed into a blank under a pressure of 400 MPa. Then, it is heated to 510-560℃ in a vacuum environment at a heating rate of 10℃ / min for sintering. After holding at this temperature for 1 hour, it is cooled with the furnace to obtain the energetic material for a gas explosion energetic electronic ignition module.

[0024] In summary, this application includes at least one of the following beneficial technical effects: (1) This application adjusts the types and amounts of raw materials used in the energetic material of the gas explosion energetic electronic ignition module, uses Al powder and Ni powder as metal powder, and adds nano-molybdenum trioxide and micron or submicron polytetrafluoroethylene as oxidants to prepare a Ni-Al energetic structural material with certain strength. The energetic material is integrated into the ignition resistor, realizing the function of directly igniting the detonator without ignition charge. This effectively avoids the safety hazards faced by workers during operation. The ignition process is not easily affected by environmental factors such as temperature and humidity, improving the flowability and safety. In addition, the gas explosion energetic electronic ignition module has a 100% trigger success rate, and the reaction threshold and ignition delay time are 4600-4800s and 21.83-22.05ms, respectively, improving the trigger success rate and response speed of the gas explosion energetic electronic ignition module. Moreover, the combustion exothermic heat value is as high as 9912KJ / kg, which has high combustion performance.

[0025] (2) This application modifies the nano molybdenum trioxide and adjusts the amount of tridecafluorooctyltrimethoxysilane added to make the reaction threshold and ignition delay time of the gas explosion energetic electronic ignition module 4200-4400s and 19.90-20.03ms, respectively, thereby further improving the response speed of the gas explosion energetic electronic ignition module.

[0026] (3) Before modifying the nano molybdenum trioxide, this application controls the moisture content of the nano molybdenum trioxide to 0.03%, so that the reaction threshold and ignition delay time of the gas explosion energetic electronic ignition module are 4000s and 19.80ms, respectively, which further improves the response speed of the gas explosion energetic electronic ignition module. Attached Figure Description

[0027] Figure 1 Diagram of a gas explosion energetic electronic ignition module Detailed Implementation

[0028] The following detailed description, in conjunction with specific embodiments, further illustrates this application. All the raw materials used in this application are commercially available products and are intended to fully disclose the raw materials used in this application; they should not be construed as limiting the source of the raw materials. Specifically: Al powder, particle size 50nm; Ni powder, particle sizes 50nm and 500μm; liquid ethane, effective substance content 99.5%; nano-molybdenum trioxide, particle size 50nm; polytetrafluoroethylene, particle sizes selected as 500μm, 500nm, and 50nm; binder, selected as polyvinylidene fluoride, brand Sanaifu, model FR900.

[0029] The following are examples of the preparation of modified nano-molybdenum trioxide. Preparation Example 1 The modified nano-molybdenum trioxide of Preparation Example 1 was prepared by the following steps: 4g of tridecafluorooctyltrimethoxysilane was added to 40mL of anhydrous ethanol to obtain a mixture. The mixture was then uniformly sprayed onto the surface of 1kg of dried nano-molybdenum trioxide, stirred at 500-700r / min for 10min, and dried at 80℃ for 1h to obtain modified nano-molybdenum trioxide. The specific drying conditions for the unmodified nano-molybdenum trioxide were: vacuum drying at 100℃ and -0.08MPa until the moisture content of the nano-molybdenum trioxide was 0.05%.

[0030] Preparation Examples 2-5 The modified nano-molybdenum trioxide prepared in Examples 2-5 differs from that in Example 1 in that the amount of tridecafluorooctyltrimethoxysilane added is 5g, 8g, 10g, and 12g, respectively, while the amounts of other raw materials are the same as in the preparation examples.

[0031] Preparation Example 6 The difference between the modified nano-molybdenum trioxide in Preparation Example 6 and Preparation Example 3 is that the moisture content of the nano-molybdenum trioxide was dried to 0.03% before modification.

[0032] Example 1 The energetic material for the gas explosion energetic electronic ignition module in Example 1 was prepared through the following steps: Al powder with a particle size of 50 nm and Ni powder with a particle size of 500 μm were mixed evenly according to the following addition ratio: Al powder 20%, Ni powder 10%, compound oxidant 69%, binder 0.7%, and liquid ethane 0.3%. Then, other raw materials were added, and the mixture was pressed into a green blank under a pressure of 400 MPa. Subsequently, it was sintered in a vacuum environment at a heating rate of 10 °C / min to 530 °C. After holding at that temperature for 1 hour, it was cooled in the furnace to obtain an energetic material for a gas explosion energetic electronic ignition module. The compound oxidant was a mixture of nano-molybdenum trioxide and 30 μm polytetrafluoroethylene, and the mass ratio of nano-molybdenum trioxide to polytetrafluoroethylene was 1:3.

[0033] Example 2 The preparation method of the energetic material for the gas explosion energetic electronic ignition module in Example 2 is the same as that in Example 2, except that the particle size of Ni powder is 50 nm, while the other types and dosages are the same as in Example 2.

[0034] Example 3 The preparation method of the energetic material for the gas explosion energetic electronic ignition module in Example 3 is the same as that in Example 2, except that the polytetrafluoroethylene particle size is 500nm.

[0035] Examples 4-7 The energetic materials used in the gas explosion energetic electronic ignition modules of Examples 4-7 are prepared in the same way as those in Example 3, except that the mass ratio of nano molybdenum trioxide to polytetrafluoroethylene is 1:4, 1:5, 1:6, and 1:7, while the other doping amounts are the same as in Example 3.

[0036] Examples 8-13 The energetic materials used in the gas explosion energetic electronic ignition modules of Examples 8-13 are prepared in the same way as those in Example 5, except that the nano molybdenum trioxide is the modified nano molybdenum trioxide prepared in Examples 1-6, and the dosage of the other raw materials is the same as that in Example 5.

[0037] Comparative Example 1 The energetic material used in the gas explosion energetic electronic ignition module of Comparative Example 1 was prepared in the same way as that in Example 1, except that nano molybdenum trioxide was replaced with polytetrafluoroethylene in equal amounts, while the other raw materials and dosages were the same as in Example 1.

[0038] Comparative Example 2 The energetic material used in the gas explosion energetic electronic ignition module of Comparative Example 1 was prepared in the same way as that in Example 1, except that polytetrafluoroethylene was replaced with an equal amount of nano molybdenum trioxide, and the other raw materials and dosages were the same as in Example 1.

[0039] Comparative Example 3 The energetic material used in the gas explosion energetic electronic ignition module of Comparative Example 3 was prepared in the same way as in Example 1, except that the particle size of polytetrafluoroethylene was controlled at 50 nm, and the remaining raw materials and dosages were the same as in Example 1.

[0040] Performance Testing (Part 1) The energetic materials obtained from different Examples 1-13 and Comparative Examples 1-3 were tested using the following methods. The test results are shown in Table 1.

[0041] The energetic materials obtained in Examples 1-13 and Comparative Examples 1-3 were applied to, for example... Figure 1 The energetic electronic ignition module detects the trigger success rate and response speed. This module includes a housing, lead wires, an electronic control module, an ignition device, and an encapsulation. Figure 1 The energetic ignition core in the diagram is the energetic ignition resistor. After receiving the detonation signal from the initiator, the electronic control module transmits current / voltage to the energetic ignition resistor until the temperature reaches the preset condition, triggering a reaction in the energetic material and generating sufficient energy to directly ignite the detonating charge, achieving a gas explosion effect. Additionally, the lead wires in the diagram transmit the detonator's detonation signal to the electronic control module. The electronic control module controls the transmission of current / voltage to the energetic ignition resistor, ensuring precise control of the ignition process. The encapsulated and injection-molded bodies protect the internal components, preventing external environmental influences on the ignition resistor while providing a certain level of mechanical strength. The reinforcing sleeve and casing further enhance the product's structural stability, ensuring normal operation even in harsh environments.

[0042] Trigger success rate: Under the same trigger energy, the samples were divided into 16 groups according to Examples 1-13 and Comparative Examples 1-3, with 30 samples in each group, and the trigger success rate of the energetic materials was tested.

[0043] Response speed: Under the same trigger energy, the reaction threshold of energetic materials is detected. The lower the reaction threshold, the faster the response speed, that is, the smaller the trigger delay.

[0044] Ignition delay time: The ignition delay time of energetic materials is detected by using an ignition delay time graph measured by a photoelectric sensor.

[0045] Calorific value of combustion exothermics: The calorific value of combustion exothermics of energetic materials was determined by oxygen bomb calorimetry.

[0046] Table 1 Performance test results of different energetic materials

[0047] The test results in Table 1 show that after applying the energetic material obtained in this application to the gas explosion energetic electronic ignition module, the triggering success rate of the gas explosion energetic electronic ignition module is 100%, the reaction threshold and ignition delay time are 4000s and 19.00ms, respectively, which improves the triggering success rate and response speed of the gas explosion energetic electronic ignition module. Moreover, the heat value of combustion exothermic value reaches up to 9912KJ / kg, which shows high combustion performance.

[0048] The performance test results of the energetic materials in Examples 1 and 2 show that when the energetic material obtained in Example 2 is applied to the gas explosion energetic electronic ignition module, the reaction threshold and ignition delay time of the gas explosion energetic electronic ignition module are 5100s and 23.25ms, respectively, which are both lower than those in Example 1. This indicates that the particle size of Al powder and Ni powder are both in the nanometer range, which can improve the response speed of the gas explosion energetic electronic ignition module.

[0049] The performance test results of the energetic materials in Examples 2 and 3 show that when the energetic material obtained in Example 3 is applied to the gas explosion energetic electronic ignition module, the reaction threshold and ignition delay time of the gas explosion energetic electronic ignition module are 5000s and 22.18ms, respectively, which are both lower than those in Example 2. This indicates that compared with the micron-scale, the use of submicron-scale polytetrafluoroethylene can further improve the response speed of the gas explosion energetic electronic ignition module.

[0050] The performance test results of the energetic materials in Examples 3-7 show that when the energetic materials obtained in Examples 4-6 are applied to the gas explosion energetic electronic ignition module, the reaction threshold and ignition delay time of the gas explosion energetic electronic ignition module are 4600-4800s and 21.83-22.05ms, respectively, which are lower than those in Examples 3 and 7. This indicates that the mass ratio of nano-molybdenum trioxide to polytetrafluoroethylene is 1:(4-6), which can further improve the response speed of the gas explosion energetic electronic ignition module.

[0051] The performance test results of the energetic materials in Examples 8-12 show that when the energetic materials obtained in Examples 9-11 are applied to the gas explosion energetic electronic ignition module, the reaction threshold and ignition delay time of the gas explosion energetic electronic ignition module are 4200-4400s and 19.90-20.03ms, respectively, which are lower than those in Examples 8 and 12. This indicates that modifying the nano molybdenum trioxide and adjusting the amount of tridecafluorooctyltrimethoxysilane added can further improve the response speed of the gas explosion energetic electronic ignition module.

[0052] The performance test results of the energetic materials in Examples 10 and 13 show that when the energetic material obtained in Example 13 is applied to the gas explosion energetic electronic ignition module, the reaction threshold and ignition delay time of the gas explosion energetic electronic ignition module are 4000s and 19.80ms, respectively, which are both lower than those in Example 10. This indicates that drying the nano molybdenum trioxide to 0.03% moisture content before modification can further improve the response speed of the gas explosion energetic electronic ignition module.

[0053] Combining the data of various indicators of the energetic materials in Comparative Examples 1-3 and Example 1, it was found that adding nano-molybdenum trioxide and polytetrafluoroethylene to the raw materials of the energetic materials, and using micron-sized and submicron-sized polytetrafluoroethylene, can improve the triggering success rate and response speed of the gas explosion energetic electronic ignition module to varying degrees.

[0054] The energetic material obtained in this application is integrated inside the ignition resistor, realizing the function of directly igniting the detonator without ignition charge, which is difficult to achieve in traditional ignition devices. This effectively avoids the safety hazards faced by workers during operation. Since the energetic material is not affected by environmental factors such as temperature and humidity, its flowability is significantly improved. Furthermore, it can safely and efficiently realize the gas explosion technology with precise and accurate energy control, resulting in high safety.

[0055] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An energetic material for a gas-explosive energetic electronic ignition module, characterized in that, The energetic material comprises the following raw materials in the following mass percentages: Al powder 15-25%, Ni powder 5-15%, compound oxidant 60-80%, binder 0.6-0.8%, and liquid ethane 0.2-0.5%; The compound oxidant is a mixture of nano-molybdenum trioxide and micron or submicron-sized polytetrafluoroethylene.

2. The energetic material for a gas explosion energetic electronic ignition module according to claim 1, characterized in that, The particle size of both the Al powder and Ni powder is 40-60 nm.

3. The energetic material for a gas explosion energetic electronic ignition module according to claim 1, characterized in that, The mass ratio of polytetrafluoroethylene to nano molybdenum trioxide is 1:(4-6).

4. The energetic material for a gas explosion energetic electronic ignition module according to claim 1, characterized in that, The nano-molybdenum trioxide was prepared by modification, and the specific steps are as follows: tridecafluorooctyltrimethoxysilane was added to anhydrous ethanol to obtain a mixture, the mixture was evenly sprayed onto the surface of the dried nano-molybdenum trioxide, stirred at 500-700 r / min for 10 min, and dried at 80℃ for 1 h to obtain modified nano-molybdenum trioxide; the volume ratio of tridecafluorooctyltrimethoxysilane to anhydrous ethanol was 1:(9-11).

5. The energetic material for a gas explosion energetic electronic ignition module according to claim 4, characterized in that, The amount of the added tridecafluorooctyltrimethoxysilane is 0.5-1% of the mass of nano molybdenum trioxide.

6. The energetic material for a gas explosion energetic electronic ignition module according to claim 4, characterized in that, The specific drying conditions for the nano-molybdenum trioxide are: vacuum drying at 100℃±5℃ and -0.08~-0.09MPa until the moisture content of the nano-molybdenum trioxide is ≤0.03%.

7. The energetic material for a gas explosion energetic electronic ignition module according to claim 1, characterized in that, The adhesive used is polyvinylidene fluoride.

8. A method for preparing an energetic material for a gas-explosion energetic electronic ignition module according to any one of claims 1-7, characterized in that, The process includes the following steps: Al powder and Ni powder are mixed evenly, other raw materials are added, and the mixture is pressed into a green blank under a pressure of 400 MPa. Then, it is heated to 510-560℃ in a vacuum environment at a heating rate of 10℃ / min for sintering. After holding at this temperature for 1 hour, it is cooled with the furnace to obtain the energetic material for the gas explosion energetic electronic ignition module.

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