COMBUSTION AND FLAME
·
2023
·
IF 4.4
Erhai An,Yihong Tan,Kehua Han,Xiaoxia Li,Xiong Cao,Yingxin Tan,Peng Deng
Molecular perovskite energetic material DAP-4 is seen as a potential high-energy oxidant due to its high energy, high density, high oxidation capacity, and facile preparation technology. However, optimizing its energy release and reducing its thermal decomposition temperature are huge challenges for its future application. In this work, the role of iron (Fe) nanospheres in the energy release of DAP-4 was studied. Our research has shown that Fe powder can not only serve as a fuel to promote combustion, but also as an important catalyst to significantly improve the thermal decomposition, energy release, and burning rate of DAP-4. By adding 25% Fe nanospheres, the decomposition temperature of DAP-4 was reduced to 299.7 °C, which is the most reduction by 84.7 °C from 384.4 °C (raw DAP-4) to 299.7 °C (DAP-4/Fe-5 with 25wt% Fe nanospheres) was obtained. The decomposition activation energy also decreases by at least 69.5 kJ mol −1 from 229.4 kJ mol −1 (DAP-4) to 159.9 kJ mol −1 (DAP-4/Fe-1 with 5wt% Fe nanospheres). The combustion performance of DAP-4/Fe composites is significantly improved by a 4∼5 times shorter burn rate. The energy-releasing mechanism of DAP-4 with the presence of Fe nanospheres was proposed. Fe x O y at the surface of Fe nanospheres played an important role in the energy releasing of DAP-4. This work showed a new idea for the potential application of molecular perovskite energetic materials.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Pengfei Zhu,Hua Fang,Yanli Zhu,Jinqiang Zhou,Xueyong Guo
Ammonium perchlorate-based molecular perovskites (DAP-4) have garnered immense interest due to their exceptional burst performance and good thermal stability. Similarly, metallic hydrides are widely acknowledged as an exceedingly promising material class for implementation in energetic systems, given their exceptional hydrogen storage density. Therefore, it is crucial to investigate the impact of hydrogen storage material MgH 2 on the thermal decomposition and combustion characteristics of molecular perovskite materials ((H 2 dabco)[NH 4 (ClO 4 ) 3 ],DAP-4). In this study, DAP-4/MgH 2 composites were synthesized and characterized for their morphology, structure, elemental distribution, thermal decomposition properties, and combustion properties. The findings indicated that the inclusion of MgH 2 reduce the thermal decomposition temperature of DAP-4. Moreover, when MgH 2 was added at a mass ratio of 5 wt %, the apparent activation energy ( E a ) decreased to 212.0 kJ/mol, while the peak combustion pressure and boosting rate increased with more intense flames. A plausible thermal decomposition and combustion mechanism of DAP-4/MgH 2 composites was postulated. This study enhances our understanding of the thermal decomposition and combustion properties of DAP-4 and magnesium hydride in energy-containing systems.
研究领域:
材料科学
·
能量材料
·
热化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energetic Materials
·
2023
·
IF 2.1
Jin-Qiang Zhou,Yi-Ming Wang,Hua Fang,Peng Deng,Jian-Xin Nie,Xue-Yong Guo,Rui Liu
The design and preparation of new high-energy composite DAP-4/Al is very important for the study of composite solid propellants. In this work, the combustion properties and reaction mechanism of DAP-4/Al composites doped with WO3 nanoparticles were studied. DAP-4/Al composites were prepared by different mass ratios. The combustion state, combustion time, pressure, pressurization rate and flame temperature of DAP-4/Al/WO3 with different mass ratios were monitored. The results show that the combustion performance of DAP-4/Al can be significantly improved under the catalysis of WO3. Compared with DAP-4/Al-5, the average combustion time of DAP-4/Al/W-4 is significantly reduced by ~ 70 ms, the average combustion pressure is increased by 654 KPa, and the average pressurization rate is increased by 0.22 MPa·s−1. Under the catalysis of WO3, the activated substances can react rapidly with H2dabco2+ and NH+ to produce CO2, CO, N2 and H2O. When the mass ratio is 20:80:2, the average maximum combustion heat of DAP-4/Al/W-4 is 8474 J/g, which is higher than 493 J/g of DAP-4/Al-5. The reaction mechanism of WO3 catalyzed DAP-4/Al system was further analyzed by TG-MS and XPS. This work provides a new idea for the future application of DAP-4/Al composites in solid propellants.
研究领域:
材料科学
·
燃烧与推进
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2024
·
IF 1.7
Erhai An,Zijun Fan,Yingxin Tan,Kanghui Jia,Qingfeng Qin,Haixia Zhao,Kehua Han,Peng Deng,Xiong Cao
The high detonation and thermostability of the molecular perovskite energetic material DAP-4 attracted a lot of interest, but its high friction sensitivity hindered its applicability. It is critical to minimize the friction sensitivity of DAP-4 for future applications. DAP-4-based composites with core-shell structures coated by polymer binders were devised and manufactured in this study. DAP-4 was discovered to be polymer binder compatible, and the thermal breakdown temperature remained constant at 380°C. The friction sensitivity of DAP-4-based core-shell composites increased from 36 N (raw DAP-4) to 60 N (DAP-4@Estane-5703, DAP-4@F2602, and DAP-4@F2311) when 10% polymer binders were added as shell-structured layers. Furthermore, their theoretical detonation performance was calculated, and each sample demonstrated superior performance. Among them, the theoretical detonation velocity of DAP-4@F2602 reached 8081 m/s, and the heat of detonation was 5.118 kJ/kg. This provided proof-of-concept work for increasing the mechanical safety of molecular perovskite energetic materials.
研究领域:
材料科学
·
爆炸物化学
✓ 已验证
产品关联
DOI
高影响因子
Defence Technology
·
2022
·
IF 4.035
Peng Deng,Xue-yong Guo,Hua Fang,Rui Liu,Peng-wan Chen
Combined with the oxidizer anions and fuel cations, molecular perovskite energetic materials show a good potential. In this work, the combustion behavior and mechanism of metal fuel aluminium (Al) with molecular perovskite energetic material (H 2 dabco)[NH 4 (ClO 4 ) 3 ] (DAP-4) as a high-energy oxidant was investigated. The DAP-4 based composites with metal fuel Al were designed and fabricated by the different mass ratios. Results showed that DAP-4 exhibits a good oxygen-supplied capacity for enhancing the combustion performance of Al. The maximum combustion heat of DAP-4/Al-3 at the Al/O mass ratio of 38:62 is up to 10,412 J/g in the inert gas, which is higher than those of other ratios and the mixtures of other energetic materials and Al. The evolution of pressure output, pressurization rate, and flame temperature was monitored for DAP-4/Al with different mass ratios. Composites DAP-4/Al/F were characterized by burning rates. The combustion reaction mechanism of metal fuel Al with DAP-4 as a high-energy oxidant was provided. DAP-4 was ignited firstly and released acid and oxidizing gases, which corroded Al 2 O 3 shells on Al particle surfaces and accelerated the combustion reaction with Al to release a lot of energy. This work offered a new idea that molecular perovskite energetic materials have great potential in the high-energy Al-based solid rocket propellants.
研究领域:
能源材料科学
·
燃烧动力学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2023
·
IF 2.8
Kaili Liang,Yang Liu,Lishuang Hu,Jiashun Liang,Tiancheng Lv,Yanping Wang,Shuangqi Hu
Micron-sized zirconium (μZr) is a viable alternative fuel source for high-energy propellants. To explore the combustion performance of Zr-containing DAP-4-based composites, DAP-4/Zr and F/DAP-4/Zr composites were designed. The results showed that the optimized composite had high combustion performance. When DAP-4/Zr was 54:46, the sample had the highest combustion heat and the fastest flame spreading velocity. The combustion time of F/DAP-4/Zr became longer after adding F 2602 , and the flame spread was the fastest when F/DAP-4/Zr was 10:48.6:41.4. The results indicate that the introduction of μZr as a fuel in DAP-4 can improve the material's energy density and combustion characteristics.
研究领域:
材料科学
·
燃烧与推进
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 22
·12739-12750
·
IF 4.4
Liang Kaili,Liu Yang,Hu Lishuang,Liang Jiashun,Lv Tiancheng,Wu Wei,Wang Yanping,Tu Zhiqiong,Hu Shuangqi
Micron-sized titanium particles have potential applications as energetic metal high-enthalpy fuel materials. The molecular perovskite energetic material DAP-4 (H 2 dabco)[NH 4 (ClO 4 ) 3 ] is a potential high-energy oxidizer in solid rocket propellants. To explore the combustion mechanism and energy output of DAP-4-based Ti composites, the combustion characteristics of DAP-4/Ti and F/DAP-4/Ti were studied by electrode ignition device. The results show that the burning rate of DAP-4 can be adjusted by controlling the mass ratio of DAP-4/Ti. After adding Ti into DAP-4, the heat release, self-sustaining combustion time and flame front propagation velocity are greatly increased to 9,113 J g −1 , 265 ms and 0.225 mm ms −1 , respectively, better than those of DAP-4. With Ti added, the decomposition peak temperature of F/DAP-4/Ti dropped from 381.5 to 360.4 ℃. The experimental results contribute to a better understanding of the chemical reaction mechanism and energy release characteristics of DAP-4-based propellants containing Ti.
研究领域:
推进剂化学
·
燃烧与爆炸科学
✓ 已验证
产品关联
DOI
高影响因子
Defence Technology
·
2023
·
IF 5.1
Er-hai An,Xiao-xia Li,Cun-juan Yu,Ying-xin Tan,Zi-jun Fan,Qing-xia Li,Peng Deng,Xiong Cao
Fe/N-based biomass porous carbon composite (Fe/N-pCarbon) was prepared by a facile high-temperature carbonization method from biomass, and the effect of Fe/N-pCarbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was studied. Biomass porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N precursors. Fe/N-pCarbon was prepared simply by the high-temperature carbonization method. It was found that it showed the inherent catalysis properties for thermal decomposition of DAP-4. The heat release of DAP-4/Fe/N-pCarbon by DSC curves tested had increased slightly, compared from DAP-4/Fe/N-pCarbon-0. The decomposition temperature peak of DAP-4 at the presence of Fe/N-pCarbon had reduced by 79°C from 384.4°C (pure DAP-4) to 305.4°C (DAP-4/Fe/N-pCarbon-3). The apparent activation energy of DAP-4 thermal decomposition also had decreased by 29.1 J/mol. The possible catalytic decomposition mechanism of DAP-4 with Fe/N-pCarbon was proposed.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
COMBUSTION AND FLAME
·
2022
·
IF 5.767
Hua Fang,Peng Deng,Rui Liu,Kehua Han,Pengfei Zhu,Jianxin Nie,Xueyong Guo
Metal hydride has been used as a potential energetic material due to its high hydrogen storage density, high reactivity, high mass calorific value and large gas production. But it was still a great challenge towards optimizing and enhancing the energy-releasing properties of metal hydride. In this work, a novel molecular perovskite energetic material (H 2 dabco)[NH 4 (ClO 4 ) 3 ] (DAP-4) was introduced as a high energy oxidant to fabricate metal hydride (MH 2 , M=Mg, Ti, and Zr) based energetic composites. The thermal decomposition, ignition and combustion characteristics of MH 2 -based energetic composites were studied. The results showed that molecular perovskite energetic material DAP-4 was beneficial as oxidant in MH 2 -based high-energy solid composites, which were originated from its high energy properties and strong oxidation capacity. The ignition and combustion reaction mechanisms of MH 2 with DAP-4 as oxidant were provided. This work offered an effective way to realize energy-releasing performance of MH 2 by molecular perovskite energetic materials introduced for their potential application.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Nanomaterials
·
2022
·
IF 3.791
Yuping Fu,Peng Deng,Xiaoxia Li
In this study, the effect of copper oxide (CuO) with different sizes on the heat-induced catalysis decomposition of typical molecular perovskite-based energetic material DAP-4 was studied. Pure CuO with different sizes and DAP-4 are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Heat-induced catalysis decomposition performances of DAP-4 with adding CuO were investigated by differential scanning calorimeter (DSC). Results demonstrated that with a lower-addition CuO at the nanoscale added (1 wt%), DAP-4 had decreased at least by 36°C with the heating rate of 10°C/min, compared with pure DAP-4. With the CuO particle size of 50 nm, the of DAP-4 heat-induced decomposition in DAP-4/CuO-50 had reduced from 159.8 kJ/mol to 120.2 kJ/mol, which is lower than DAP-4/CuO-150. The heat-induced catalysis decomposition mechanism of DAP-4 by using CuO as a nanoadditive was proposed.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Erhai An,Yingxin Tan,Cunjuan Yu,Ying Zhang,Haihong Liu,Xiong Cao,Peng Deng,Xiaoxia Li
Nano Silicon (Si) powder has become a new type of solid fuel in recent years because of its high energy density , large gas production, and low agglomeration behavior. Optimizing and improving its energy release performance is an important challenge. In this paper, DAP-4, an energetic molecular perovskite material with high energy and strong oxidation , was introduced as the oxidant to prepare DAP-4/Si composites, and its combustion properties were studied. The thermal decomposition , combustion performance, as well as their combustion product properties, were studied. The results showed the thermal decomposition properties of DAP-4/Si composites still keep stable (>370 °C), and the combustion properties of DAP-4/Si composites first increase with Si content and then reduced. It was confirmed that DAP-4/Si with the ratio of 6.5:3.5–6:4 had a better burning intensity than the other ratios. The combustion mechanism of DAP-4/Si composites was proposed based on the ignition and combustion characteristics of DAP-4/Si composites. This work may provide a further reference for the application of DAP-4 into solid propellant formulation.
研究领域:
材料科学
·
化学工程
·
高能材料
·
燃烧科学
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2025
·
IF 2
Liang Zhang,Chen Zhao,Zuohui Xu,Yuhuai Shi,Erhai An,Jinhu Liang,Xiong Cao
Al is widely used in solid propellants for its high energy density. (C 6 H 14 N 2 )[NH 4 (ClO 4 ) 3 ]（DAP-4）, a novel energetic material, exhibits excellent detonation performance, thermal stability, oxidizing capacity, and cost efficiency, making it a promising high-energy oxidizer. This study investigated the ignition and combustion properties of DAP-4/nano-Al mixtures. DAP-4 was synthesized via a one-pot molecular self-assembly strategy, and mixtures with varying Al ratios (10%–30%) were prepared through mechanical mixing. X-ray diffraction (XRD) confirmed that the mixed powders retained their original crystalline structures without the formation of new phases. Scanning electron microscopy (SEM) revealed that nano-Al particles adhered effectively to DAP-4 surfaces, with higher Al content increasing the particle coverage. Elemental mapping and EDS were used to further characterize the surface morphology changes. Thermogravimetry-Differential Scanning Calorimetry（TG–DSC） indicated good compatibility between DAP-4 and nano-Al, with minimal mutual interference during thermal decomposition. Ignition experiments were conducted in a shock tube under temperatures (2200–3100 K) and pressures (0.1 and 0.5 MPa). The results showed that in the DAP-4/nano-Al mixtures, an increase in the Al fraction caused a decrease in the ignition delay time and an increase in the burn time. Simultaneously, the reaction in the presence of Al changed qualitatively, as is apparent from the changed activation energies. Compared to the combustion of neat DAP-4, both the ignition delay and burn times could be longer or shorter, depending on the Al fraction. This study demonstrated that the addition of nano-Al effectively enhanced DAP-4 combustion. In practice, DAP-4's ignition and combustion can be controlled by adjusting the nano-Al mass fraction.
研究领域:
含能材料
·
燃烧科学
·
推进剂
·
纳米技术
·
材料化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）