Stabilized aluminum-lithium alloy composite material with strong micro-explosion and preparation method and application thereof

Abstract

The present application relates to a kind of stable aluminum lithium alloy composite materials of strong micro-explosion combustion and preparation method and application, the composite material is core-shell structure, including aluminum lithium alloy core and the coating shell formed by vacuum silicon grease and fluorine-containing silane coupling agent;Its component includes, 90%-98% aluminum lithium alloy, 1%-5% vacuum silicon grease and 1%-5% fluorine-containing silane coupling agent by mass percentage.It has good hydrophobicity in the aluminum lithium alloy composite material of the present application, after 60 days of natural storage in air, mass increase is very low, and active heat value retention rate is as high as 99.5%, solve the problem of poor weather resistance of aluminum lithium alloy.In addition, the thermal localization effect occurs when the introduced fluorine-containing organic shell layer is heated, and the ignition energy is reduced;While the fluorine-containing free radicals produced by decomposition carry out in-situ etching (chemical shell breaking) to oxide layer, and combine the vapor pressure of internal metal lithium to cause violent "strong micro-explosion" phenomenon, effectively tear the oxide shell, and the combustion performance is improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum-lithium alloy materials with an organic coating, specifically to a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion, its preparation method, and its application. Background Technology

[0002] Aluminum-lithium alloys are considered promising metallic fuels for solid propellants and mixed explosives due to their high energy density, low density, and high calorific value. However, aluminum-lithium alloys are chemically highly reactive, readily reacting with oxygen and moisture in the environment, leading to a reduction in the content of active metals. Furthermore, they are prone to agglomeration during combustion, resulting in incomplete combustion and limiting their energy release efficiency. Existing aluminum-lithium alloy modification technologies mostly focus on simple physical coatings, which, while improving stability to some extent, often suppress the fuel's combustion activity and increase ignition delay.

[0003] Therefore, developing a high-performance aluminum-lithium alloy fuel that can achieve high stability during long-term storage and promote combustion reaction and reduce agglomeration through the induced "micro-explosion" mechanism is a technical challenge that urgently needs to be solved in the field of energetic materials. Summary of the Invention

[0004] The purpose of this invention is to utilize the excellent physical barrier properties of vacuum silicone grease and the low surface energy and fluorine-containing characteristics of fluorinated silane coupling agents to construct a composite shell layer with high water resistance, thermal localization effect, and chemical shell-breaking function on the surface of aluminum-lithium alloys through a synergistic coating strategy. This achieves high stability and high flammability of the aluminum-lithium alloy composite material.

[0005] To achieve the above technical objectives, the present invention provides a stabilized aluminum-lithium alloy composite material with strong combustion and micro-explosion, which has a core-shell structure, including an aluminum-lithium alloy core and a coating shell composed of vacuum silicone grease and a fluorinated silane coupling agent. Its components, by mass percentage, include, 90%-98% aluminum-lithium alloy, 1%-5% vacuum silicone grease and 1%-5% fluorinated silane coupling agent.

[0006] Furthermore, the covering shell accounts for 2%-8% of the core mass.

[0007] Furthermore, the water contact angle on its surface is greater than 130°.

[0008] This invention also provides a method for preparing a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion, comprising, The ingredients are formulated according to the mass percentage of the product to obtain 90%-98% aluminum-lithium alloy, 1%-5% vacuum silicone grease and 1%-5% fluorinated silane coupling agent. Vacuum silicone grease, fluorinated silane coupling agent and solvent are mixed evenly to obtain the precursor solution; An aluminum-lithium alloy was added to a precursor solution and stirred to react. After post-treatment, a stabilized aluminum-lithium composite material with strong combustion and micro-explosion was obtained.

[0009] Furthermore, the ratio of the aluminum-lithium alloy to the solvent is 0.8-1.5 g: 10 mL.

[0010] Furthermore, the solvent includes at least one of n-hexane, ethanol, and isopropanol.

[0011] Furthermore, the stirring reaction is carried out at a temperature of 25-60℃ and a rotation speed of 200-500 rpm for 2-6 hours.

[0012] Furthermore, the post-processing includes solid-liquid separation, washing, and drying.

[0013] Furthermore, the drying process is carried out at a temperature of 40-80°C for 12-24 hours.

[0014] This invention also provides the application of the above-mentioned stabilized aluminum-lithium alloy composite material with strong combustion and micro-explosion in solid propellants and explosives.

[0015] Compared with the prior art, the beneficial effects of the present invention include: (1) Excellent environmental stability: The aluminum-lithium alloy composite material of the present invention has good hydrophobicity. After being stored naturally in the air for 60 days, the mass increase is very low and the active heat value retention rate is as high as 99.5%, which completely solves the problem of poor weather resistance of aluminum-lithium alloy.

[0016] (2) Significant strong micro-explosion characteristics: The introduced fluorine-containing organic shell undergoes thermal localization when heated, reducing ignition energy; at the same time, the fluorine-containing free radicals generated by decomposition perform in-situ etching (chemical shell breaking) on ​​the oxide layer, and combined with the vapor pressure of internal lithium metal, it leads to a violent "strong micro-explosion" phenomenon, effectively tearing the oxide shell.

[0017] (3) Significantly improved combustion performance: Compared with unmodified aluminum-lithium alloy, the aluminum-lithium alloy composite material exhibits a significantly increased pressure rise rate (dP / dt) during combustion (the increase can reach more than 200%), and the particle size of combustion products is significantly refined (D 50 It can be reduced to 1.65 μm), effectively suppressing aggregation.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0020] Figure 1 A flowchart of the preparation method of Al-5Li@VG@TF composite powder of the present invention is shown; Figure 2 (a)- Figure 2 (c) shows a scanning electron microscope image of the material prepared in Example 2. Figure 2 (d)- Figure 2 (h) shows the distribution of total elements, O elements, Si elements, Al elements and F elements in the materials prepared in Example 2; Figure 3 (a)- Figure 3 (e) shows a high-resolution transmission electron microscope image of the material interface prepared in Example 2. Figure 3 (f)- Figure 3 (i) is the EDS diagram of the interface.

[0021] Figure 4 Scanning electron microscope (SEM) images of the materials prepared in Examples 1, 3, and Comparative Example 1 are shown.

[0022] Figure 5 A morphology diagram of the material prepared in Comparative Example 2 is shown.

[0023] Figure 6 The calorific values ​​of the materials prepared in Examples 1-4 and Comparative Example 1 are shown.

[0024] Figure 7 The water contact angle test diagrams of Al-5Li and the materials prepared in Comparative Example 2 and Example 2 are shown; Figure 8 The graph shows the mass change of Al-5Li and the materials prepared in Comparative Example 2 and Example 2 after natural storage in air for 60 days. Figure 9 High-speed photographs of the combustion flames of Al-5Li and the materials prepared in Example 2 are shown. Figures 10(a) and 10(b) show the combustion pressure-time curves and pressure rise rates of Al-5Li and the materials prepared in Comparative Example 2 and Example 2, respectively.

[0025] Figure 11 The diagram shows a comparison of the particle size of the combustion products after laser ignition of Al-5Li, the materials obtained in Example 2, and Comparative Example 2 in an oxygen atmosphere. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] The concept of this invention lies in utilizing the excellent physical barrier properties of vacuum silicone grease and the low surface energy and fluorine-containing characteristics of fluorinated silane coupling agents to construct a composite shell layer with high water resistance, thermal localization effect, and chemical shell-breaking function on the surface of aluminum-lithium alloy through a synergistic coating strategy. The introduced fluorinated organic shell layer undergoes thermal localization upon heating, reducing ignition energy; simultaneously, the fluorinated free radicals generated by decomposition perform in-situ etching (chemical shell breaking) on ​​the oxide layer, and combined with the vapor pressure of the internal metallic lithium, cause a violent "strong micro-explosion" phenomenon, effectively tearing apart the oxide shell. This results in an aluminum-lithium alloy composite material with strong micro-explosive properties and improved combustion performance.

[0030] In view of this, on the one hand, the present invention provides a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion, which has a core-shell structure, including an aluminum-lithium alloy core and a coating shell composed of vacuum silicone grease and a fluorinated silane coupling agent. Its components, by mass percentage, include, 90%-98% aluminum-lithium alloy, 1%-5% vacuum silicone grease and 1%-5% fluorinated silane coupling agent.

[0031] Vacuum grease is typically a white, semi-transparent paste that does not harden or solidify. It is chemically stable, resistant to most chemicals such as acids, alkalis, water, and solvents, and exhibits excellent compatibility with materials such as metals, ceramics, rubber, and plastics, without causing corrosion or swelling. Vacuum grease is primarily used as a sealing material to ensure the airtightness of vacuum systems while maintaining a high vacuum level due to its extremely low volatility.

[0032] Compared to ordinary silane coupling agents, fluorinated silane coupling agents introduce fluorine-containing groups into their molecular structure, inheriting the "molecular bridge" function of traditional silane coupling agents, and exhibiting lower surface energy and superior chemical stability. In this invention, the type of fluorinated silane coupling agent is not strictly limited, and can be exemplarily at least one of 3,3,3-trifluoropropyltriethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, and 3,3,3-trifluoropropylmethyldimethoxysilane.

[0033] In some preferred embodiments, the covering shell accounts for 2%-8% of the core mass.

[0034] In some preferred embodiments, the water contact angle on the surface of the aluminum-lithium alloy composite material is greater than 130°.

[0035] On the other hand, the present invention also provides a method for preparing a stabilized aluminum-lithium alloy composite material with strong micro-explosion during combustion, comprising, The ingredients are formulated according to the mass percentage of the product to obtain 90%-98% aluminum-lithium alloy, 1%-5% vacuum silicone grease and 1%-5% fluorinated silane coupling agent. Vacuum silicone grease, fluorinated silane coupling agent and solvent are mixed evenly to obtain the precursor solution; An aluminum-lithium alloy was added to a precursor solution and stirred to react. After post-treatment, a stabilized aluminum-lithium composite material with strong combustion and micro-explosion was obtained.

[0036] In some preferred embodiments, the ratio of the aluminum-lithium alloy to the solvent is 0.8-1.5 g: 10 mL.

[0037] In some preferred embodiments, the solvent includes at least one of n-hexane, ethanol, and isopropanol.

[0038] In some preferred embodiments, the stirring reaction is carried out at a temperature of 25-60°C and a rotation speed of 200-500 rpm for 2-6 hours.

[0039] In some preferred embodiments, the post-processing includes solid-liquid separation, washing, and drying.

[0040] In some preferred embodiments, the drying is carried out at a temperature of 40-80°C for 12-24 hours.

[0041] The present invention will be further described in detail below through specific embodiments. It should be noted that the embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in this field or in accordance with the product instructions. Reagents or instruments used that do not specify the manufacturer are all conventional products that can be obtained commercially.

[0042] Example 1 like Figure 1 As shown, a method for preparing a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion includes the following steps: S1. Weigh 5g of aluminum-lithium alloy (Al-5Li), 0.05g of vacuum silicone grease, and 0.05g of 3,3,3-trifluoropropyltriethoxysilane. The designed coating amount is 2%. S2. Add vacuum silicone grease and 3,3,3-trifluoropropyltriethoxysilane to 50 mL of isopropanol and sonicate for 15 min to obtain the precursor solution. S3. Add Al-5Li to the precursor solution and stir at 300 rpm for 4 hours in a 40°C water bath. S4. After the reaction is complete, the slurry is centrifuged, washed three times with n-hexane, and dried in a vacuum drying oven at 60°C for 12 hours to obtain a stabilized aluminum-lithium alloy composite material with strong combustion and micro-explosion.

[0043] Example 2 A method for preparing a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion includes the following steps: S1. Weigh 5g Al-5Li, 0.1g vacuum silicone grease, and 0.1g 3,3,3-trifluoropropyltriethoxysilane, with a designed coating weight of 4%; S2. Add vacuum silicone grease and 3,3,3-trifluoropropyltriethoxysilane to 50 mL of isopropanol and sonicate for 15 min to obtain the precursor solution. S3. Add Al-5Li to the precursor solution and stir at 300 rpm for 4 hours in a 40°C water bath. S4. After the reaction is complete, the slurry is centrifuged, washed three times with n-hexane, and dried in a vacuum drying oven at 60℃ for 12 hours to obtain a stabilized aluminum-lithium alloy composite material with strong combustion and micro-explosion, which is named Al-5Li@VG@TF.

[0044] Example 3 A method for preparing a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion includes the following steps: S1. Weigh out 5g Al-5Li, 0.15g vacuum silicone grease, and 0.15g 3,3,3-trifluoropropyltriethoxysilane, with a designed coating amount of 6%; S2. Add vacuum silicone grease and 3,3,3-trifluoropropyltriethoxysilane to 50 mL of isopropanol and sonicate for 15 min to obtain the precursor solution. S3. Add Al-5Li to the precursor solution and stir at 300 rpm for 4 hours in a 40°C water bath. S4. After the reaction is complete, the slurry is centrifuged, washed three times with n-hexane, and dried in a vacuum drying oven at 60°C for 12 hours to obtain a stabilized aluminum-lithium alloy composite material with strong combustion and micro-explosion.

[0045] Example 4 A method for preparing a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion includes the following steps: S1. Weigh 5g Al-5Li, 0.2g vacuum silicone grease, and 0.2g 3,3,3-trifluoropropyltriethoxysilane, with a designed coating amount of 8%; S2. Add vacuum silicone grease and 3,3,3-trifluoropropyltriethoxysilane to 50 mL of isopropanol and sonicate for 15 min to obtain the precursor solution. S3. Add Al-5Li to the precursor solution and stir at 300 rpm for 4 hours in a 40°C water bath. S4. After the reaction is complete, the slurry is centrifuged, washed three times with n-hexane, and dried in a vacuum drying oven at 60°C for 12 hours to obtain a stabilized aluminum-lithium alloy composite material with strong combustion and micro-explosion.

[0046] Comparative Example 1 A method for preparing an aluminum-lithium alloy composite material includes the following steps: S1. Weigh out 5g Al-5Li, 0.25g vacuum silicone grease, and 0.25g 3,3,3-trifluoropropyltriethoxysilane, with a designed coating amount of 10%. S2. Add vacuum silicone grease and 3,3,3-trifluoropropyltriethoxysilane to 50 mL of isopropanol and sonicate for 15 min to obtain the precursor solution. S3. Add Al-5Li to the precursor solution and stir at 300 rpm for 4 hours in a 40°C water bath. S4. After the reaction is complete, the slurry is centrifuged, washed three times with n-hexane, and dried in a vacuum drying oven at 60°C for 12 hours to obtain a stabilized aluminum-lithium alloy composite material with strong combustion and micro-explosion.

[0047] Comparative Example 2 A method for preparing an aluminum-lithium alloy composite material includes the following steps: S1. Weigh 5g of Al-5Li and 0.2g of vacuum silicone grease, with a designed coating amount of 4%; S2. Add vacuum silicone grease to 50 mL of isopropanol and sonicate for 15 min to obtain the precursor solution; S3. Add Al-5Li to the precursor solution and stir at 300 rpm for 4 hours in a 40°C water bath. S4. After the reaction is complete, the slurry is centrifuged, washed three times with n-hexane, and dried in a vacuum drying oven at 60℃ for 12 hours to obtain an aluminum-lithium alloy composite material, which is named Al-5Li@VG.

[0048] Comparative Example 3 A method for preparing an aluminum-lithium alloy composite material includes the following steps: S1. Weigh 5g of aluminum-lithium alloy and 0.2g of 3,3,3-trifluoropropyltriethoxysilane, with a designed coating amount of 4%; S2. Add 3,3,3-trifluoropropyltriethoxysilane to 50 mL of isopropanol and sonicate for 15 min to obtain the precursor solution. S3. Add the aluminum-lithium alloy to the precursor solution and stir at 300 rpm for 4 hours in a 40°C water bath. S4. After the reaction is complete, the slurry is centrifuged, washed three times with n-hexane, and dried in a vacuum drying oven at 60°C for 12 hours to obtain the aluminum-lithium alloy composite material.

[0049] Test case The microstructure of Al-5Li@VG@TF prepared in Example 2 was observed using scanning electron microscopy. Figure 2 (a)- Figure 2 (c) It can be seen that the Al-5Li surface after coating treatment has a relatively smooth and complete coating structure. From Figure 2 (d)- Figure 2 (h) It can be seen that the O, Si, Al and F elements of the coated aluminum-lithium alloy powder are clearly distributed on the surface of the aluminum-lithium alloy powder and appear spherical in the mapping diagram. This proves that the coating layer is evenly distributed and the coating effect is good. Figure 3 (a)- Figure 3 (f) can show the structure and position division of the micro-interface coating layer of Al-5Li@VG@TF. It can be seen that there is a very obvious and uniformly thick two-layer organic coating shell (shell thickness is about 36nm) at the edge of the particle, which is closely attached to the oxide layer on the surface of the aluminum-lithium alloy substrate with lattice stripes.

[0050] from Figure 4It can be seen that the mass fraction of the coating agent affects the microstructure and dispersibility of the composite material. When the mass fraction is low (2%), the modifier cannot form a completely continuous coating on the surface of the aluminum-lithium alloy; while when the mass fraction is too high (10%), excessive coating components are prone to causing severe matrix adhesion and autonomous agglomeration between particles; at a mass fraction of 6%, the coating layer on the powder surface is relatively smooth and complete, and maintains monodispersity.

[0051] from Figure 5 It can be seen that when only 4% VG is used to coat Al-5Li, the dispersibility between the composite powders is poor. Secondly, the lack of density in the 4% VG coating may result in obvious oxide protrusions on the surface of the obtained powder.

[0052] Figure 6 The calorific values ​​of Al-5Li, the composites of Examples 1-4, and Comparative Example 1, measured at 3 MPa O2, are shown. Since both VG and TF are low-energy substances, their calorific values ​​decrease with increasing coating content and coating mass fraction. Therefore, while excessive coating achieves high density, it also significantly reduces the combustion performance of the composite powder.

[0053] The water contact angles of Al-5Li, Comparative Example 2 Al-5Li@VG, and Example 2 Al-5Li@VG@TF were tested. Figure 7 As can be seen, compared to untreated hydrophilic Al-5Li, Comparative Example 2 and Example 2 changed from hydrophilic to hydrophobic, especially Example 2, which achieved a water contact angle of 130.1 ± 0.7°. These results indicate that the vacuum silicone grease and fluorinated siloxanes work synergistically to improve the water contact angle of the material.

[0054] Al-5Li, Al-5Li@VG (Comparative Example 2), and Al-5Li@VG@TF (Example 2) were stored naturally in air for 60 days, with the material quality tested every 10 days during this period. Figure 8 As can be seen, after 60 days, the mass gain rate of Al-5Li reached as high as 139.94%, while the mass gain rates of Comparative Example 2 and Example 2 were 3.89% and 1.04%, respectively. It is evident that coating the surface of Al-5Li with vacuum silicone grease and 3,3,3-trifluoropropyltriethoxysilane can prevent it from reacting with oxygen and moisture in the environment, thereby improving its stability.

[0055] Al-5Li and Al-5Li@VG@TF from Example 2 were ignited, and the combustion process was recorded using a high-speed camera. Figure 9It can be seen that Al-5Li@VG@TF has a shorter ignition time, a longer combustion duration, and more micro-explosions are observed. At the same time, a mushroom cloud-like eruption of the flame can be observed during the combustion process. This is because the introduced fluorine-containing organic shell undergoes thermal localization when heated, which reduces the ignition energy. Meanwhile, the fluorine-containing free radicals generated by the decomposition perform in-situ etching (chemical shell breaking) on ​​the oxide layer, and combined with the vapor pressure of the internal metallic lithium, it leads to a violent "strong micro-explosion" phenomenon, effectively tearing apart the oxide shell.

[0056] Combustion experiments were conducted on Al-5Li, Al-5Li@VG (Comparative Example 2), and Al-5Li@VG@TF (Example 2) in a closed-circuit reactor. Figures 10(a) and 10(b) show that the peak pressure and pressure rise rate of Example 2 were higher than those of Comparative Example 2 and Al-5Li, with the pressure rise rate increasing by approximately 224% compared to Al-5Li. The combustion residue of Example 2 was analyzed by scanning electron microscopy (SEM). Figure 11 ), particle size D 50 The size is only 1.65 μm, indicating that aggregation was effectively suppressed.

[0057] In summary, this invention uses vacuum silicone grease and silane coupling agents as synergistic modifiers to construct an organic-inorganic hybrid shell on the surface of aluminum-lithium alloys through physical adsorption and chemical grafting, thereby improving the hydrophobicity and oxidation resistance of the aluminum-lithium alloy surface. The resulting aluminum-lithium alloy composite material exhibits unique strong micro-explosion and self-sustaining combustion characteristics during combustion, with a significantly increased pressure rise rate, fine combustion product particle size, and no obvious agglomeration. Furthermore, the preparation process is simple, low-cost, and has a short cycle time, making it suitable for high-energy solid propellants and explosives.

[0058] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion, characterized in that, It has a core-shell structure, consisting of an aluminum-lithium alloy core and a coating shell made of vacuum silicone grease and fluorinated silane coupling agent; Its components, by mass percentage, include, 90%-98% aluminum-lithium alloy, 1%-5% vacuum silicone grease and 1%-5% fluorinated silane coupling agent.

2. The stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion as described in claim 1, characterized in that, The outer shell accounts for 2%-8% of the core mass.

3. The stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion as described in claim 1, characterized in that, Its surface has a water contact angle greater than 130°.

4. A method for preparing a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion, characterized in that, include, The ingredients are formulated according to the mass percentage of the product to obtain 90%-98% aluminum-lithium alloy, 1%-5% vacuum silicone grease and 1%-5% fluorinated silane coupling agent. Vacuum silicone grease, fluorinated silane coupling agent and solvent are mixed evenly to obtain the precursor solution; An aluminum-lithium alloy was added to a precursor solution and stirred to react. After post-treatment, a stabilized aluminum-lithium composite material with strong combustion and micro-explosion was obtained.

5. The method for preparing the stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion according to claim 4, characterized in that, The ratio of the aluminum-lithium alloy to the solvent is 0.8-1.5 g: 10 mL.

6. The method for preparing the stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion according to claim 4, characterized in that, The solvent includes at least one of n-hexane, ethanol, and isopropanol.

7. The method for preparing the stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion according to claim 4, characterized in that, The stirring reaction was carried out at a temperature of 25-60℃ and a rotation speed of 200-500 rpm for 2-6 hours.

8. The method for preparing the stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion according to claim 4, characterized in that, The post-processing includes solid-liquid separation, washing, and drying.

9. The method for preparing the stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion according to claim 8, characterized in that, The drying process is carried out at a temperature of 40-80℃ for 12-24 hours.

10. The application of a stabilized aluminum-lithium alloy composite material with strong combustion micro-explosion as described in any one of claims 1-3 in solid propellants and explosives.

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