Article
Thermodynamics
Makoto Kohga, Ryoto Togashi, Hironori Tsutiya, Yusuke Ota
Summary: This study investigated the burning characteristics of propellants supplemented with different amounts of Fe2O3. It was found that adding 1% Fe2O3 can increase the burning rate of propellants with different AP particle properties, and this effect is independent of pressure.
COMBUSTION AND FLAME
(2022)
Article
Chemistry, Applied
Hironori Tsuchiya, Ryoto Togashi, Makoto Kohga
Summary: This study investigates the influence of fine porous ammonium perchlorate (PAP) on the burning characteristics of an ammonium nitrate (AN)/ammonium perchlorate (AP) propellant and the effect of Fe2O3 as a catalyst. The results show that the porosity of PAP can increase the burning rate of AN/AP propellants, with minimal influence from pressure and ?.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2023)
Article
Thermodynamics
Yinghui Hu, Xuwen Wang, Jingwei Hao, Shouhang Jiang, Jian Zhang, Yulin Yang, Kaifeng Lin, Jian Zheng, Yong Shuai
Summary: In this study, four CuMxOy catalysts were synthesized and used for catalyzing AP decomposition and HTPB-based propellant combustion. The CuMxOy catalysts showed improved catalytic activity and increased decomposition efficiency.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Multidisciplinary
Pragnesh Dave, Riddhi Thakkar, Ruksana Sirach
Summary: By adding nanosize cobalt copper ferrite (CoCuF) as an additive, the thermal decomposition temperature of ammonium perchlorate (AP) can be significantly reduced, the burning rate increased, and the activation energy greatly lowered.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Multidisciplinary
Yunjiong Zhu, Xin Yu, Guofei Zhang, Zhiyong Yan, Xuechun Xiao
Summary: La2O2CO3, Co3O4, and La2O2CO3/Co3O4 composites were prepared through one-step solution combustion method using citric acid as oxidant and lanthanum nitrate and cobalt nitrate as reductants. The La2O2CO3/Co3O4 composite exhibited the best catalytic performance. It significantly reduced the decomposition temperature and activation energy of ammonium perchlorate (AP) and improved the combustion efficiency of AP/hydroxyl-terminated polybutadiene solid propellant. The mechanism analysis revealed that the adsorption of NH3 by La2O2CO3 and the unfilled 3d orbitals of Co3O4 played crucial roles in promoting the decomposition of AP and accelerating electron transfer.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Physical
Baoyun Ye, Hongyi Chen, Binhao Shen, Chang Liu, Chongwei An, Jingyu Wang, Yong Zhang
Summary: A novel RGO-MoS2/MnO2 nanocomposite catalyst was successfully constructed via in situ hydrothermal method. The RSM nanocomposite exhibited a network-loaded nanoparticle structure with abundant active sites. The RSM-3 catalyst showed significant catalysis for AP decomposition and could decrease the decomposition temperature to 327.8 degrees C and enhance the heat release to 1530.4 J.g(-1). It also decreased the activation energy of HD stage, shortened the ignition delay time of AP/HTPB propellants, and increased the mass burning rate. The excellent catalytic performance of RSM-3 is attributed to the synergy of the metal-carbon structure of RGO-MoS2 and MnO2 nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Rui Li, Xiaodong Li, Guangcheng Yang, Changping Guo, Liqing Zhang, Chenchun Hao, Wenkun Zhu
Summary: This work reports a hybrid with metallic Co nanoparticles encapsulated in N-doped defective activated carbon (DAC/Co) as a bi-functional additive with high catalytic activity and high reactivity. The combination of Co nanoparticles and DAC enhances the combustion performance of AP, leading to a shortened combustion duration and increased pressurization rate.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Aerospace
Felix A. Rodriguez, James C. Thomas, Thomas E. Sammet, David S. Teitge, Eric L. Petersen
Summary: Ammonium perchlorate (AP) is a commonly used oxidizer in composite propellants, and its combustion behavior can be controlled by micro- and nano-metal oxide catalysts. The study found that micro-iron oxide increased the burning rate of AP within a certain pressure range, while nano-titanium oxide and nano-iron oxide increased the burning rate at higher pressures. The presence of catalytic additives eliminated the negative slope typically observed in the burning rate curve of plain AP, and nano-additive formulations showed higher low-pressure deflagration limits.
JOURNAL OF PROPULSION AND POWER
(2022)
Article
Thermodynamics
Shuang Xu, Aimin Pang, Jie Kong
Summary: This study investigated the influence of urea-based burning rate suppressants (BRSs) on AP and HTPE binders. It was found that BRSs with lower activation energies can better reduce the burning rates of propellants. The thermogravimetry-Fourier transform infrared spectrometer curves showed that the cyano groups in BRS-1 and BRS-2 are more effective in generating ammonia.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Ke-Juan Meng, Haorui Zhang, Shuai-Zhong Wang, Yi Wang, Qinghua Zhang, Qi-Long Yan
Summary: The novel insensitive high-energy-density material ICM-102 shows lower sensitivity and higher energy, making it suitable for low-vulnerability propellants. It increases peak decomposition temperature and burning rate of propellants, with narrower and smaller particle size distributions of combustion products compared to RDX-based propellants.
COMBUSTION AND FLAME
(2022)
Article
Nanoscience & Nanotechnology
Taixin Liang, Xuejun Yang, Bo Liu, Ruidong Song, Fei Xiao, Yajun Yang, Dong Wang, Mengyao Dong, Junna Ren, Ben Bin Xu, Hassan Algadi, Yuanyuan Yang
Summary: The combustion behavior of ammonium perchlorate (AP) can be influenced by the addition of catalyst, as well as the combination mode of catalyst and AP. This study investigated different catalysts and AP prepared by mechanical mixing and spray drying composite. The results showed that the spray drying composites exhibited better catalytic performance on the thermal decomposition of AP compared to mechanical mixing. All catalysts passivated the low-temperature decomposition process of AP and catalyzed the high-temperature decomposition process.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Thermodynamics
Pragnesh Dave, Ruksana Sirach, Riddhi Thakkar, M. P. Deshpande, Dilip M. Badgujar
Summary: Cobalt Copper Zinc Ferrite (CoCuZnF) was synthesized and characterized. The catalytic effect of nano CoCuZnF on AP and AP-based CSP was studied. The results showed that the presence of CoCuZnF decreased the thermal decomposition temperature and activation energy of AP, and increased the burn rate of AP-based CSP.
COMBUSTION SCIENCE AND TECHNOLOGY
(2023)
Article
Thermodynamics
Slimane Bekhouche, Djalal Trache, Amir Abdelaziz, Ahmed Fouzi Tarchoun, Hani Boukeciat
Summary: In the past decade, the scientific community has extensively studied the decomposition of ammonium perchlorate (AP). This research aims to investigate the effect of nanothermite on the thermal decomposition of AP. MgAl-PTFE nanothermite was mechanically activated through arrested reactive milling, coated with potassium perchlorate (KP), and characterized. The results showed that the phase compositions remained unchanged and the presence of nanothermites promoted the thermal decomposition process of AP by reducing the activation energy by about 6%.
THERMOCHIMICA ACTA
(2023)
Article
Chemistry, Inorganic & Nuclear
Vanessa Molina, Juan Luis Arroyo, Desmond MacLeod-Carey, Alvaro Munoz-Castroa, Cesar Morales-Verdejo
Summary: The [trans-Cu (mu-OH)(mu-dmpz)](6) complex can effectively reduce the decomposition temperature of ammonium perchlorate and increase the heat release as a burning rate catalyst. Compared to nano-metallic oxides, this copper compound shows superior performance in modifying the decomposition mechanism and accelerating the overall burning process.
Article
Thermodynamics
E. A. Kammar, E. A. M. Gad, M. A. Mousa
Summary: NixCo1-xFe2O4 spinel nanoparticles were prepared using different methods and showed catalytic activity in the thermal decomposition of ammonium perchlorate, with NiCoF-gl exhibiting the highest catalytic activity. The addition of nanosized ferrites decreased the decomposition temperatures of AP.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Applied
Makoto Kohga, Tomoki Naya
JOURNAL OF ENERGETIC MATERIALS
(2015)
Article
Chemistry, Applied
Makoto Kohga, Saori Handa
JOURNAL OF ENERGETIC MATERIALS
(2017)
Article
Chemistry, Applied
Makoto Kohga, Saori Handa
JOURNAL OF ENERGETIC MATERIALS
(2018)
Article
Chemistry, Applied
Makoto Kohga
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2017)
Article
Chemistry, Applied
Makoto Kohga
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2017)
Article
Thermodynamics
Makoto Kohga, Shimpei Togo
COMBUSTION AND FLAME
(2018)
Article
Engineering, Aerospace
Tomoki Naya, Makoto Kohga
AEROSPACE SCIENCE AND TECHNOLOGY
(2014)
Article
Thermodynamics
Shingo Shioya, Makoto Kohga, Tomoki Naya
COMBUSTION AND FLAME
(2014)
Article
Polymer Science
Makoto Kohga, Tomoki Naya, Shingo Shioya
JOURNAL OF APPLIED POLYMER SCIENCE
(2013)
Article
Chemistry, Applied
Tomoki Naya, Makoto Kohga
JOURNAL OF ENERGETIC MATERIALS
(2015)
Article
Engineering, Aerospace
Tomoki Naya, Makoto Kohga
JOURNAL OF PROPULSION AND POWER
(2014)
Article
Chemistry, Applied
Makoto Kohga, Ryoto Togashi
Summary: In this study, a plasticizer, Glycerol propoxylate (GPO) was added to the binder Hydroxyl-terminated polybutadiene (HTPB) to improve its elasticity and burning characteristics. The addition of GPO was effective in extending the pot life and enhancing the mechanical properties of the propellant. However, GPO did not increase the burning rate of the propellant.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2021)
Article
Chemistry, Applied
Ryoto Togashi, Makoto Kohga
Summary: Ammonium perchlorate (AP)-based composite propellant is the most widely used solid propellant, requiring fine AP for high burning rates. This study successfully prepared finer AP by using a dual-sonic premixer to emulsify toluene and the AP solution, which can be used as a propellant oxidizer based on its impact and thermal sensitivities.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2021)
Article
Thermodynamics
Makoto Kohga, Ryoto Togashi, Hironori Tsutiya, Yusuke Ota
Summary: This study investigated the burning characteristics of propellants supplemented with different amounts of Fe2O3. It was found that adding 1% Fe2O3 can increase the burning rate of propellants with different AP particle properties, and this effect is independent of pressure.
COMBUSTION AND FLAME
(2022)
Article
Chemistry, Applied
Hironori Tsuchiya, Ryoto Togashi, Makoto Kohga
Summary: This study investigates the influence of fine porous ammonium perchlorate (PAP) on the burning characteristics of an ammonium nitrate (AN)/ammonium perchlorate (AP) propellant and the effect of Fe2O3 as a catalyst. The results show that the porosity of PAP can increase the burning rate of AN/AP propellants, with minimal influence from pressure and ?.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2023)