Fe-hof material, preparation method and application thereof

Abstract

The application relates to the technical field of solid propellants, and particularly provides a Fe-HOF material, a preparation method and application thereof, the molecular formula of the material is Fe X -HOF, wherein x is in the range of 0.2-1, the Fe-HOF material is in a rod-like microstructure, the length of a single particle is 0.5-10 mu m, and the length-diameter ratio is 10:1-20:1, the preparation method is that diisonorbornyl iron, melamine and trimesic acid are used as raw materials, and oil bath reaction is carried out. The Fe-HOF material can be used as a combustion performance regulator in a propellant containing AP and / or HMX, and the pyrolysis and combustion performance of the AP and / or HMX is improved.

Description

Technical Field

[0001] This invention relates to the field of solid propellant technology, specifically providing an Fe-HOF material, its preparation method, and its application. Background Technology

[0002] Solid propellants are the main power source for weapons and rocket engines. "In aerospace development, power comes first." Improving the performance of solid propellants plays a key role in overall combat effectiveness.

[0003] Solid propellants release chemical energy through combustion and convert it into kinetic energy. Their combustion performance directly affects the ballistic performance of solid rocket engines and is one of the most important performance indicators of solid propellants.

[0004] Solid propellants mainly consist of oxidizers, nitramine explosives (possibly included), binders, plasticizers, metallic fuels, and other additional components. Among these, oxidizers and nitramine explosives (possibly included), as the oxygen source for propellant combustion, constitute a relatively high proportion in the propellant formulation, and their thermal decomposition process has a significant impact on the propellant's combustion behavior and energy release. Generally speaking, the lower the thermal decomposition temperature, the higher the burning rate, and vice versa. Therefore, by combining the trend and magnitude of the shift in the thermal decomposition temperature of energetic materials before and after the addition of combustion performance modifiers, we can also predict the trend and magnitude of the change in the burning rate after their introduction into the propellant to a certain extent.

[0005] Currently, ammonium perchlorate (AP) and octogen (HMX) are the most widely used components in solid propellants due to their high effective oxygen content, high density, and large gas generation. However, AP thermal decomposition suffers from problems such as high pyrolysis temperature, low heat release, and scattered heat release. With the increasing demand for high-energy solid propellants, nitramine components, represented by HMX, are gradually replacing AP as a crucial component in propellants, a trend that is becoming increasingly significant. To meet the performance requirements of modern defense construction for solid propellants and to effectively control their combustion performance, effective functional additives are necessary to regulate the thermal decomposition performance of AP and HMX.

[0006] Adding combustion performance modifiers is one of the most effective ways to improve the pyrolysis and combustion performance of AP and HMX. Common combustion performance modifiers include elemental metals, metal oxides, metal composite oxides, and carbon-based composite combustion performance modifiers. However, they usually have problems such as easy agglomeration and oxidation, which leads to reduced catalytic activity or complex preparation processes and high costs, making it difficult to meet the actual needs of engineering applications. Summary of the Invention

[0007] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide an Fe-HOF material, its preparation method and application.

[0008] The technical solution of this invention is an Fe-HOF material with the molecular formula Fe. x -HOF, where x ranges from 0.2 to 1, the Fe-HOF material has a rod-like microstructure, with the length of a single particle ranging from 0.5 to 10 μm and an aspect ratio of 10:1 to 20:1.

[0009] The present invention also provides a method for preparing the above-mentioned Fe-HOF material, which uses dinonyl iron carbonyl, melamine and trimesic acid as raw materials and obtains the Fe-HOF material by oil bath reaction.

[0010] Furthermore, the preparation method includes the following steps: Step 1: Disperse dinonyl iron carbonyl in a first organic solvent. The preferred molar concentration range of dinonyl iron carbonyl is 0.065 mol / L to 0.167 mol / L. Sonicate the solution to ensure uniform dispersion and obtain solution A. Step 2: Disperse melamine and pyromellitic acid in a second organic solvent. The molar concentrations of melamine and pyromellitic acid are each independently in the range of 0.22 mol / L to 0.33 mol / L. Sonicate the mixture to make it evenly dispersed to obtain solution B. Step 3: Mix solutions A and B and transfer them to a flask. Place the flask in an oil bath and start stirring. Step 4: Centrifuge the washed product, dry it, and then grind it to obtain the Fe-HOF material.

[0011] Furthermore, the first organic solvent and the second organic solvent are each independently anhydrous ethanol or N,N-dimethylformamide.

[0012] Furthermore, the molar ratio of melamine to trimesic acid is 1:1; the molar ratio of dinonylcarbonyl iron to melamine or trimesic acid is 0.2~1:1.

[0013] Furthermore, in step three, the oil bath temperature is 80℃~120℃; the stirring rate is 200r / min~300r / min; and the stirring time is 8~12h.

[0014] Furthermore, the centrifugal separation and washing product in step four refers to the product of alternating centrifugal separation and washing with water and alcohol.

[0015] The present invention also provides an application of the above-mentioned Fe-HOF material, wherein the Fe-HOF material is used as a component of a propellant.

[0016] Furthermore, the Fe-HOF material is used as a combustion performance modifier in propellants containing AP and / or HMX.

[0017] The present invention has the following beneficial effects: 1. The Fe-HOF material of the present invention has a regular microstructure, is rod-shaped, and has good dispersibility. When used as a combustion performance modifier in solid propellants, it can effectively reduce the thermal decomposition temperature of AP and / or HMX, increase its heat release, and lower the ignition threshold, thus exhibiting excellent catalytic performance.

[0018] 2. The preparation process of this invention is simple and the reaction conditions are mild. The final product can be obtained by only one reaction step, which is easy to scale up for production and has high application potential.

[0019] 3. The Fe-HOF of the present invention, when used in propellant systems containing AP and / or HMX, exhibits superior AP pyrolysis catalytic effects compared to commonly used AP pyrolysis (combustion) performance modifiers such as Fe2O3 and Catocene in existing solid propellant systems. Specifically, the mixture after blending with AP has a lower pyrolysis temperature and more apparent heat release. Simultaneously, Fe-HOF has been experimentally tested to have a certain HMX pyrolysis catalytic effect. Calculations of the pyrolysis reaction kinetic constants show that its introduction can significantly reduce the apparent activation energy of the HMX pyrolysis process. Laser ignition tests demonstrate that the introduction of Fe-HOF can reduce the ignition threshold of AP and HMX to a certain extent, promoting their combustion process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 High-speed photographic comparison of laser ignition of pure AP powder and Fe-HOF+AP mixed powder containing 10wt% of the Fe-HOF material of this invention under the same ignition conditions, wherein (a1)-(d1) are high-speed photographic images of laser ignition of pure AP powder; (a2)-(d2) are high-speed photographic images of laser ignition of Fe-HOF+AP mixed powder containing 10wt% of the Fe-HOF material of this invention.

[0022] Figure 2 High-speed photographic comparison images of pure HMX powder and Fe-HOF+HMX mixed powder containing 10wt% of the Fe-HOF material of this invention under the same ignition conditions, wherein (a1)-(e1) are high-speed photographic images of pure HMX powder laser ignition; (a2)-(e2) are high-speed photographic images of Fe-HOF+HMX mixed powder containing 10wt% of the Fe-HOF material of this invention laser ignition.

[0023] Figure 3 The images show SEM images of the Fe-HOF samples, where (a)-(d) represent Fe in sequence. 0.2 -HOF, Fe 0.5 -HOF, Fe 0.8 -HOF, Fe 1.0 -HOF SEM image; Figure 4 FTIR spectra of Fe-HOF samples prepared with different amounts of dinonyl iron carbonyl; Figure 5 Elemental content testing results for Fe-HOF samples prepared with different amounts of dinonyl iron carbonyl; Figure 6 A comparison of the pyrolysis effects of Fe-HOF samples prepared with different amounts of dinonyl iron carbonyl, blended with AP at 10 wt%, and pure AP. Figure 7 For pure AP, Fe 0.5 - Comparison of the pyrolysis effects of HOF sample (prepared by the method in Example 2) and blends of Catocene and Fe2O3 with AP at 10wt% content; Figure 8 Fe 0.5 -HOF sample (prepared by the method in Example 2) and Fe 0.5- HOF YC-DMF-80°C-12h (Prepared by the method in Example 5) and Fe 0.5 -HOF YC-DMF-120°C-8h (Prepared by the method in Example 6) Comparison of pyrolysis catalytic effects after mixing with AP at 10 wt% [where YC refers to ethanol solvent, DMF refers to NN-dimethylformamide solvent, the same below]; Figure 9 AP and AP-Fe at different heating rates 0.5 -HOF mixture (Fe obtained by the method in Example 2) 0.5 The DSC curves of AP-HOF (with an addition amount of 10 wt%) are shown in Figure (a). 0.5 Figure (b) shows the DSC curves of the -HOF mixture at different heating rates. Figure 10 HMX and HMX-Fe at different heating rates 0.5 -HOF mixture (Fe obtained by the method in Example 2) 0.5 The DSC curves of HMX-Fe (added at 10 wt%) are shown in Figure (a). 0.5 The DSC curves of the -HOF mixture at different heating rates are shown in Figure (b). Figure 11 For different samples (i.e.) Figure 9 , Figure 10 AP, AP-Fe 0.5 -HOF mixture, HMX and HMX-Fe 0.5 -HOF mixture) thermal decomposition ln(β / T) p 2 )~1000 / T p Relationship curve (T) p (Pyrolysis peak temperature) Figure 12 The graph shows the relationship between the pyrolysis reaction constant k of AP, AP-Fe-HOF mixture, HMX, and HMX-Fe-HOF mixture and temperature, where (a) represents the relationship between AP and AP-Fe. 0.5 (a) Pyrolysis reaction constant k of HMX-HOF mixture versus temperature; (b) Pyrolysis reaction constant k of HMX-HOF mixture versus HMX-Fe 0.5 -The relationship between the pyrolysis reaction constant k of the HOF mixture and temperature. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments.

[0025] Example 1 A method for preparing Fe-HOF includes the following steps: Weigh 1.455g of Fe2(CO)9 and dissolve it in 60mL of anhydrous ethanol. Sonicate the solution until it is evenly dispersed and record this solution as solution A. Weigh 2.522g of melamine and 4.203g of trimesic acid and dissolve them in 180mL of anhydrous ethanol solution. Sonicate the solution to disperse it evenly. This solution is denoted as solution B. Both solutions were transferred to a flask and subjected to a high-temperature oil bath reaction at 100°C for 10 hours with stirring at a rate of 200 rpm. After the preset reaction time, the reaction was stopped and allowed to cool naturally. The product was then collected after alternating centrifugation with anhydrous ethanol and deionized water, and dried overnight in a vacuum drying oven. The resulting combustion performance modifier sample was obtained by grinding and labeled as Fe. 0.2 -HOF.

[0026] Example 2 A method for preparing Fe-HOF includes the following steps: Weigh 3.638g of Fe2(CO)9 and dissolve it in 60mL of anhydrous ethanol. Sonicate the solution until it is evenly dispersed and record this solution as solution A. Weigh 2.522g of melamine and 4.203g of trimesic acid and dissolve them in 180mL of anhydrous ethanol solution. Sonicate the solution to disperse it evenly. This solution is denoted as solution B. Both solutions were transferred to a flask and subjected to a high-temperature oil bath reaction at 100°C for 10 hours with stirring at a rate of 250 rpm. After the preset reaction time, the reaction was stopped and allowed to cool naturally. The product was then collected after alternating centrifugation with anhydrous ethanol and deionized water, and dried overnight in a vacuum drying oven. The resulting combustion performance modifier sample was obtained by grinding and labeled as Fe. 0.5 -HOF.

[0027] Example 3 A method for preparing Fe-HOF includes the following steps: Weigh 5.821g of Fe2(CO)9 and dissolve it in 120mL of anhydrous ethanol. Sonicate the solution until it is evenly dispersed and record this solution as solution A. Weigh 2.522g of melamine and 4.203g of trimesic acid and dissolve them in 120mL of anhydrous ethanol solution. Sonicate the solution to disperse it evenly and label it solution B. Both solutions were transferred to a flask and subjected to a high-temperature oil bath reaction at 100°C for 10 hours with stirring at a rate of 300 rpm. After the preset reaction time, the reaction was stopped and allowed to cool naturally. The product was then washed alternately with anhydrous ethanol and deionized water by centrifugation, collected, and dried overnight in a vacuum drying oven. The resulting combustion performance modifier sample was obtained by grinding and labeled as Fe. 0.8 -HOF.

[0028] Example 4 A method for preparing Fe-HOF includes the following steps: Weigh 7.276g of Fe2(CO)9 and dissolve it in 120mL of anhydrous ethanol. Sonicate the solution until it is evenly dispersed and record this solution as solution A. Weigh 2.522g of melamine and 4.203g of trimesic acid and dissolve them in 120mL of anhydrous ethanol solution. Sonicate the solution to disperse it evenly and label it solution B. Both solutions were transferred to a flask and subjected to a high-temperature oil bath reaction at 100°C for 10 hours with stirring at a rate of 300 rpm. After the preset reaction time, the reaction was stopped and allowed to cool naturally. The product was then washed alternately with anhydrous ethanol and deionized water by centrifugation, collected, and dried overnight in a vacuum drying oven. The resulting combustion performance modifier sample was obtained by grinding and labeled as Fe. 1.0 -HOF.

[0029] Example 5 A method for preparing Fe-HOF includes the following steps: Weigh 3.638g of Fe2(CO)9 and dissolve it in 60mL of N,N-dimethylformamide. Sonicate the solution until it is evenly dispersed. This solution is denoted as solution A. Weigh 2.522g of melamine and 4.203g of trimesic acid and dissolve them in 180mL of anhydrous ethanol solution. Sonicate the solution to disperse it evenly. This solution is denoted as solution B. Both solutions were transferred to a flask and subjected to a high-temperature oil bath reaction at 80°C for 12 hours with stirring at a rate of 250 rpm. After the preset reaction time, the reaction was stopped and allowed to cool naturally. The product was then collected after alternating centrifugation with anhydrous ethanol and deionized water, and dried overnight in a vacuum drying oven. The resulting combustion performance modifier sample was obtained by grinding and labeled as Fe. 0.5 -HOF YC-DMF-80°C-12h .

[0030] Example 6 A method for preparing Fe-HOF includes the following steps: Weigh 3.638g of Fe2(CO)9 and dissolve it in 60mL of N,N-dimethylformamide. Sonicate the solution until it is evenly dispersed. This solution is denoted as solution A. Weigh 2.522g of melamine and 4.203g of trimesic acid and dissolve them in 180mL of anhydrous ethanol solution. Sonicate the solution to disperse it evenly. This solution is denoted as solution B. Both solutions were transferred to a flask and subjected to a high-temperature oil bath reaction at 120°C for 8 hours with stirring at a rate of 250 rpm. After the preset reaction time, the reaction was stopped and allowed to cool naturally. The product was then collected after alternating centrifugation with anhydrous ethanol and deionized water, and dried overnight in a vacuum drying oven. The resulting combustion performance modifier sample was obtained by grinding and labeled as Fe. 0.5 -HOF YC-DMF-120°C-8h .

[0031] Test Results Figure 1 For pure AP and mixed with 10wt% Fe under the same excitation conditions 0.5 -HOF combustion performance modifier AP-Fe 0.5 - High-speed photographic comparison of HOF mixed powder laser ignition shows that, under the same excitation conditions, pure AP powder is almost not excited, while the combustion performance modifier Fe... 0.5 The intense combustion of AP powder after mixing with HOF largely demonstrates that the combustion performance modifier can lower the ignition threshold of AP, thereby promoting its combustion and improving its ignition performance.

[0032] Figure 2 Under the same excitation conditions, pure HMX and a mixture of 10 wt% Fe were used. 0.5 -HOF combustion performance modifier HMX-Fe 0.5 - High-speed photographic comparison of HOF mixed powder laser ignition, showing the difference between the ignition performance and that of the combustion performance modifier Fe under the same excitation conditions. 0.5 The combustion of the powder was intensified after mixing with HOF, indicating that the combustion performance modifier can promote combustion to a certain extent.

[0033] Figure 3 The microstructures of Fe-HOFs prepared with different amounts of Fe2(CO)9 were obtained by SEM imaging. It can be seen that their microstructures are relatively regular, exhibiting a rod-like shape, while Fe... 0.5 -HOF relative to Fe 0.2 -HOF particles are significantly thicker, with individual particle lengths ranging from 3 to 10 μm and aspect ratios of approximately 10:1 to 20:1.

[0034] Figure 4 FT-IR spectra of Fe-HOF prepared with different amounts of Fe2(CO)9 show that the 3468 cm⁻¹ is located at... -1 and 3417cm -1 It can be attributed to the -NH2 stretching vibration peak, 1500-1652 cm⁻¹ -1 The peak is a bend absorption peak belonging to the triazine ring and -NH2. (3000 cm⁻¹) -1 The large diffuse peak at 1689 cm⁻¹ can be attributed to the -COOH group and internal hydrogen bonds in the TMA structure. -1 A C=O stretching vibration peak exists at 1608 cm⁻¹. -1 The absorption peak at 740 cm⁻¹ belongs to the C=C region of the benzene ring. Additionally, there is an absorption peak at 740 cm⁻¹. -1 and 685cm -1 There is also an out-of-plane bending vibration peak of the benzene ring.

[0035] Figure 5 The elemental composition of Fe-HOF prepared with different amounts of Fe2(CO)9 shows that as the amount of Fe2(CO)9 increases, the Fe element content does indeed gradually increase, while the N element content gradually decreases. This indicates that Fe may be doped into the surface or interior of Fe-HOF by replacing N.

[0036] Figure 6 DSC curves of Fe-HOF and AP mixed powders prepared with different amounts of Fe2(CO)9 were shown, with Fe-HOF accounting for 10 wt% of the mixed powder. With the relative increase of Fe content, the catalytic effect of Fe-HOF on AP pyrolysis showed a trend of first increasing and then decreasing. 0.2 -HOF and Fe 0.5-HOF can transform the pyrolysis of AP into a single-stage concentrated exothermic process, in which Fe 0.5 -HOF's AP pyrolysis catalytic performance is even better than Fe 0.2 -HOF can further advance the decomposition peak temperature from 328.1°C to 314.5°C; with the continued increase of Fe content, its catalytic performance for AP pyrolysis shows a downward trend, changing from the original one-stage concentrated exothermic process to a two-stage decomposition exothermic process similar to AP decomposition itself, involving high and low temperatures. 0.5 -HOF exhibits the best catalytic effect in AP pyrolysis, meaning it can shift the AP decomposition peak temperature forward the most.

[0037] Figure 7 Fe 0.5 - Comparison of the catalytic effects of HOF, Catocene, and Fe2O3 on AP pyrolysis. It can be seen that, with an addition amount of 10wt%, compared to Catocene and Fe2O3, Fe... 0.5 -HOF can advance the AP decomposition peak temperature to 314.5°C and make AP pyrolysis exhibit a one-stage concentrated exothermic state, thus its catalytic performance for AP pyrolysis is superior.

[0038] Figure 8 Fe 0.5 -HOF and Fe 0.5 -HOF YC-DMF-80°C-12h Fe 0.5 -HOF YC-DMF-120°C-8h The comparison chart of the catalytic effect of AP pyrolysis shows that, compared with two other catalysts, Fe... 0.5 -HOF can advance the AP decomposition peak temperature to 314.5°C and make AP pyrolysis exhibit a one-stage concentrated exothermic state, thus providing better catalytic performance for AP pyrolysis.

[0039] Figure 9 Fe 0.5 The DSC curves of HOF and AP mixed powder and pure AP at different heating rates show that as the heating rate increases, the decomposition peak temperature lags and the peak shape gradually becomes sharper. Based on the decomposition peak temperature data at different heating rates, the pyrolysis reaction kinetic parameters can be calculated.

[0040] Figure 10 Fe 0.5 The DSC curves of HOF / HMX mixed powder and pure HMX at different heating rates show that the decomposition peak temperature lags and the peak shape gradually becomes sharper with increasing heating rate. Another noteworthy phenomenon is the interaction with Fe... 0.5After mixing with HOF, the crystallization peak of the original HMX almost disappears, making it difficult to capture on the pyrolysis curve; the pyrolysis reaction kinetic parameters can be calculated based on the decomposition peak temperature data at different heating rates.

[0041] Figure 11 Fe 0.5 -HOF and AP mixed powder and pure AP, Fe 0.5 -HOF and HMX mixed powder and pure HMX were determined according to their decomposition peak temperature T at various heating rates. p ln(β / T) based on heating rate information p 2 )~1000 / T p The correlation curve shows that the linear correlation of each line is relatively high, with a correlation coefficient R0. 2 All values ​​exceeded 0.98, indicating that using the Kissinger formula to calculate the pyrolysis reaction kinetics should be relatively scientific and reasonable.

[0042] Figure 12 Fe 0.5 -HOF and AP mixed powder and pure AP, Fe 0.5 The pyrolysis reaction rates of HOF and HMX mixed powder and pure HMX were calculated based on the Kissinger equation and the Arrhenius equation. k The curve showing the relationship between temperature and temperature indicates that after 300°C, the temperature of Fe-containing... 0.5 -HOF of Fe 0.5 The pyrolysis reaction constant of the -HOF-AP mixture begins to far exceed that of pure AP, which corresponds to the significant advancement of its catalytic decomposition process and the marked enhancement of the decomposition process; while before 290°C, the Fe content... 0.5 -HOF of Fe 0.5 The decomposition reaction constant of the -HOF-HMX mixture is also higher than that of HMX, but the increase is not significant, which is consistent with the fact that its decomposition peak temperature advances only slightly.

[0043] Table 1 shows Fe 0.5 -HOF and AP mixed powder and pure AP, Fe 0.5 Thermodynamic / kinetic parameters of thermal decomposition obtained from the HOF and HMX mixed powder and pure HMX show that the introduction of Fe... 0.5 - Apparent activation energy of the pyrolysis reaction of HMX after HOF E a Significantly reduced, Fe was introduced 0.5 - HOF followed by the pyrolysis reaction rate constants of AP and HMX k (T p The levels of both components were significantly higher than those of the single component, which is consistent with the phenomenon that their introduction accelerated the decomposition process of AP and HMX.

[0044] Table 1 Thermodynamic / kinetic parameters of thermal decomposition for different samples The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A Fe-HOF material, characterized in that, Its molecular formula is Fe X -HOF, where x ranges from 0.2 to 1, the Fe-HOF material has a rod-like microstructure, with the length of a single particle ranging from 0.5 to 10 μm and an aspect ratio of 10:1 to 20:

1.

2. A method for preparing Fe-HOF material according to claim 1, characterized in that, The Fe-HOF material was obtained by reacting dinonyl iron carbonyl, melamine, and trimesic acid in an oil bath.

3. The preparation method according to claim 2, characterized in that, Includes the following steps: Step 1: Disperse the dinonylcarbonyl iron in a first organic solvent and sonicate it to ensure uniform dispersion, thereby obtaining solution A; Step 2: Disperse the melamine and trimesic acid in a second organic solvent and sonicate to ensure uniform dispersion, thereby obtaining solution B; Step 3: Mix and stir the A solution and the B solution to obtain a suspension; Step 4: Centrifuge the suspension to separate and wash the product, dry it, and then grind it to obtain the Fe-HOF material.

4. The preparation method according to claim 3, characterized in that, The first organic solvent and the second organic solvent are each independently anhydrous ethanol or N,N-dimethylformamide.

5. The preparation method according to claim 3, characterized in that, In step one, the molar concentration of dinonylcarbonyl iron in solution A is in the range of 0.065 mol / L to 0.167 mol / L; In step two, the molar concentration ranges of melamine and trimesic acid are each independently 0.22 mol / L to 0.33 mol / L.

6. The preparation method according to claim 3, characterized in that, In step two, the molar ratio of polycyanate to pyromellitic acid is 1:1; The molar ratio of dinonylcarbonyl iron in step one to melamine or trimesic acid in step two is 0.2 to 1:

1.

7. The preparation method according to claim 3, characterized in that, Step three includes: mixing solution A and solution B and transferring them to a flask, placing the flask in an oil bath and simultaneously activating the stirrer, wherein the oil bath temperature is 80℃~120℃; the stirring rate is 200r / min~300r / min; and the stirring time is 8~12h.

8. The preparation method according to claim 3, characterized in that, The centrifugation and washing product in step four refers to the product of alternating centrifugation and washing with water and alcohol.

9. An application of the Fe-HOF material according to claim 1, characterized in that, The Fe-HOF material is used as a propellant component for combustion performance regulation.

10. The application according to claim 9, characterized in that, The Fe-HOF material is used as a combustion performance modifier in propellants containing AP and / or HMX.

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