检索结果-南通市图书馆

Micro-aluminum powder with bi-or tri-component alloy coating as a promising catalyst:Boosting pyrolysis and combustion of ammonium perchlorate

引用

Defence Technology（防务技术） 2024年第3期33卷 100-113页

作者： Chao Wang Ying Liu Mingze Wu Jia Li Ying Feng Xianjin Ning Hong Li Ningfei Wang Baolu Shi School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

A novel design of micro-aluminum(μAl)powder coated with bi-/tri-component alloy layer,such as:Ni-P and Ni-P-Cu(namely,Al@Ni-P,Al@Ni-P-Cu,respectively),as combustion catalysts,were introduced to release its huge energy inside Al-core and promote rapid pyrolysis of ammonium perchlorate(AP)at a lower temperature in aluminized *** microstructure of Al@Ni-P-Cu demonstrates that a three-layer Ni-P-Cu shell,with the thickness of~100 nm,is uniformly supported byμAl carrier(fuel unit),which has an amorphous surface with a thickness of~2.3 nm(catalytic unit).The peak temperature of AP with the addition of Al@Ni-P-Cu(3.5%)could significantly drop to 316.2℃ at high-temperature thermal decomposition,reduced by 124.3℃,in comparison to that of pure AP with 440.5℃.It illustrated that the introduction of Al@Ni-P-Cu could weaken or even eliminate the obstacle of AP pyrolysis due to its reduction of activation energy with 118.28 kJ/*** laser ignition results showed that the ignition delay time of Al@Ni-P-Cu/AP mixture with 78 ms in air is shorter than that of Al@Ni-P/AP(118 ms),decreased by 33.90%.Those astonishing breakthroughs were attributed to the synergistic effects of adequate active sites on amorphous surface and oxidation exothermic reactions(7597.7 J/g)of Al@Ni-P-Cu,resulting in accelerated mass and/or heat transfer rate to catalyze AP pyrolysis and ***,it is believed to provide an alternative Al-based combustion catalyst for propellant designer,to promote the development the propellants toward a higher energy.

关键词： Micro-aluminum powder(μAl) Nano-sized alloy coating Combustion catalyst ammonium perchlorate Pyrolysis behavior Ignition and combustion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Simple preparation of C(CS)/g-C_(3)N_(4)/Co carbon aerogel and its catalytic performance for ammonium perchlorate

引用

Defence Technology（防务技术） 2024年第3期33卷 186-196页

作者： Yujie Yan Bo Jin Rufang Peng State Key Laboratory of Environment-friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyang621010China

Biomass chitosan(CS)was used as a template,graphitic phase carbon nitride(g-C_(3)N_(4))with high nitrogen content and certain catalytic activity was used as a dopant,and nano-transition metal cobalt(Co)was used as a catalytic center *** carbon aerogel(C(CS)/g-C_(3)N_(4)/Co)with a three-dimensional network-like structure was prepared by assembling the three materials through experimental operations such as freeze-drying and high-temperature *** was demonstrated by scanning and transmission characterization that the CS in the carbon aerogel could provide more active sites for the cobalt nanoparticles,and the doping of graphite-phase carbon nitride as a template dispersed the cobalt nanoparticles and changed the conductivity of the *** investigate the catalytic effect of carbon aerogel on ammonium perchlorate(AP),it was investigated by differential thermal analyzer and TG thermal *** carbon aerogel was very effective in catalyzing AP,and the 10 wt% content of the catalyst reduced the AP pyrolysis peak from 703.9 to 595.5 *** to further investigate the synergistic effect of the three materials,further carbon aerogels such as C(CS)/Co,g-C_(3)N_(4)/Co were prepared and applied to catalyze AP,and the same ratio reduced the AP pyrolysis peak by 98.1℃ and 97.7℃.This result indicates a synergistic effect of the assembly of the three materials.

关键词： g-C_(3)N_(4) Chitosan Co ammonium perchlorate Pyrolysis kinetics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of the microporous structure of ammonium perchlorate on thermal behaviour and combustion characteristics

引用

Defence Technology（防务技术） 2022年第7期18卷 1156-1166页

作者： Hai-jun Zhang Jian-xin Nie Gang-ling Jiao Xing Xu Xue-yong Guo Shi Yan Qing-jie Jiao State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Naval Research Institute of PLA Beijing100161China The Sixth Institute 601 Branch of China Aeronautical Science and Technology CorporationHohhot010076China

ammonium perchlorate(AP)is the component with the highest content in composite propellants,and it plays a crucial role in propellant *** view of the effects of low-temperature AP thermal decomposition on thermal safety and combustion characteristics,porous ammonium perchlorate(PAP)samples with different mass losses were first prepared by thermal convection heating,and the structures were characterized and ***,the effects of decomposition degree on the thermal decomposition characteristics of PAP were studied by ***,the combustion characteristics of AP/Al binary mixtures were tested with high-speed photography and in a sealed *** results showed that low-temperature decomposition of AP resulted in formation of porous structures for AP *** pores first appeared near the surfaces of the particles and began from multiple points at the same *** pores increased in size to approximately 5 mm and then expanded,and finally,the AP particles were full of *** partial decomposition,the crystal structure of AP remained unchanged,but the low and high decomposition temperatures decreased *** decomposition rate *** to the porous structure of PAP,the combustion rate of the AP/Al system increased obviously with increasing decomposition of *** relationship between the combustion rate and the mass loss was approximately linear under open conditions,and it was exponential for a high-pressure environment.A computational model of the combustion process for the AP/Al binary system was established to explain the effects of pore structure and pressure on the combustion process.

关键词： Microporous structure ammonium perchlorate Thermal behavior Porosity Combustion characteristics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis of Co Nanoparticles and Their Catalytic Effect on the Decomposition of ammonium perchlorate

引用

Chinese Journal of Chemical Engineering 2008年第2期16卷 325-328页

作者：段红珍蔺向阳刘冠鹏徐磊李凤生 School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China Department of Chemistry School of Science North University of China Taiyuan 030051 China

The monodispersed Co nanoparticles were successfully prepared by means of hydrogen plasma method in inert atmosphere. The particle size, specific surface area, crystal structure and morphology of the samples were characterized by transmission electron microscopy （TEM）, BET equation, X-ray diffraction （XRD）, and the corresponding selected area electron diffraction （SAED）. The catalytic effect of Co nanoparticles on the decomposition of ammonium perchlorate （AP） was investigated by differential thermal analyzer （DTA）. Compared with the thermal decomposition of pure AP, the addition of Co nanoparticles （2%-10%, by mass） decreases the decomposition temperature of AP by 145.01-155.72℃. Compared with Co3O4 nano-particles and microsized Co particles, the catalytic effect of Co nanoparticles for AP is stronger. Such effect is attributed to the large specific surface area and its interaction of Co with decomposition intermediate gases. The present work provides useful information for the application of Co nanoparficles in the AP-based propellant.

关键词： Co nanoparticle ammonium perchlorate hydrogen plasma method catalytic effect decomposition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tuning thermal decomposition of ammonium perchlorate by nanoporous Gd2O3 for improved safety and enhanced propellant efficiency

引用

Journal of Rare Earths 2020年第1期38卷 108-112页

作者： Xuezhen Zhou Chunyan Hu Xiaojun Liu Weifan Chen Qun Tang Yongxiu Li Research Center for Rare Earths&Nano/micro Functional Materials Nanchang UniversityNanchang 330047China Jiangxi Agricultural University Nanchang 330045China

Nanoporous Gd2O3 powders(NGPs) with different specific surface areas were prepared by a nonaqueous sol-gel method and utilized to tune the exothermal decomposition of ammonium perchlorate(AP) for enhanced propellant efficiency and improved *** is found that with the increasing dosage of NGPs into AP,the two exothermal peaks of AP merge into one intense exothermal peak,indicating that an "energy stacking" has been ***,the unique delay of the first exothermal peak of AP is conducive to the safety of AP in application ***,the dependence of decomposition heat of AP on dosage and calcination temperature is more evident than on the surface areas of NGPs,suggesting that the promotion effect of NGPs on the thermal decomposition of AP does not only rely on the surface ***,an electron transfer mechanism is proposed to illustrate the decomposition process of AP tuned by NGPs.

关键词： Nanoporous Gd2O3 powders Thermal decomposition ammonium perchlorate Electron transfer mechanism Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rare-earth,nitrogen-rich,oxygen heterocyclic supramolecular compounds(Nd,Sm,and Eu):Synthesis,structure,and catalysis for ammonium perchlorate

引用

Journal of Rare Earths 2022年第3期40卷 428-433,I0003页

作者： Wenjia Hao Tao Huang Bo Jin Jinhao Zhang Juan Shen Rufang Peng State Key Laboratory of Environment-friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyang 621010China

Three novel rare-earth,nitrogen-rich and oxygen heterocyclic supramolecular complexes,namely[Nd(BTF)_(2)(H_(2)O)_(5)]_(n),[Sm(BTF)_(2)(H_(2)O)_(5)]_(n),and[Eu(BTF)_(2)(H_(2)O)_(5)]_(n),were synthesized.A single crystal was obtained by the solvent evaporation method,and the structure and coordination mode of metal complexes were determined by single crystal X-ray *** show that the supramolecular complexes contain many hydrogen bonds and thus have good thermal stability(T_(dec)>540 K).The thermal decomposition of ammonium perchlorate(AP)catalyzed by the complexes was investigated by differential thermal analysis,which reveals a pre-eminent catalytic effect on *** high temperature decomposition peak of AP can be advanced by nearly 90 K at the amount of added complexes of 10 wt%,and the activation energy of AP descent range is from 70 to 150 kJ/*** other properties were fully characterized through elemental analysis and Fourier transform infrared spectroscopy.

关键词： Nitrogen rich oxygen heterocycles Lanthanide supramolecular complexes ammonium perchlorate Thermal decomposition Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recent progress on transition metal oxides and carbon-supported transition metal oxides as catalysts for thermal decomposition of ammonium perchlorate

引用

Defence Technology（防务技术） 2021年第4期17卷 1471-1485页

作者： Teng Chen Yi-wen Hu Cai Zhang Zhao-jian Gao School of Material and Chemical Engineering Xuzhou University of TechnologyXuzhouJiangsuPR China Xi’an Modern Chemistry Research Institute Xi’anShaanxiPR China Xuzhou University of Technology XuzhouJiangsuPR China

As a main oxidizer in solid composite propellants,ammonium perchlorate(AP)plays an important role because its thermal decomposition behavior has a direct influence on the characteristic of solid composite *** improve the performance of solid composite propellant,it is necessary to take measures to modify the thermal decomposition behavior of *** recent years,transition metal oxides and carbon-supported transition metal oxides have drawn considerable attention due to their extraordinary catalytic *** this review,we highlight strategies to enhance the thermal decomposition of AP by tuning morphology,varying the types of metal ion,and coupling with carbon *** enhanced catalytic performance can be ascribed to synergistic effect,increased surface area,more exposed active sites,and accelerated electron transportation and so *** mechanism of AP decomposition mixed with catalyst has also been briefly ***,a conclusive outlook and possible research directions are suggested to address challenges such as lacking practical application in actual formulation of solid composite propellant and batch manufacturing.

关键词： Transition metal oxides Carbon-supported transition metal oxides Catalyst ammonium perchlorate Thermal decomposition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Particle size effect on ammonium perchlorate decomposition kinetics

引用

航空动力学报 2012年第5期27卷 1179-1184页

作者： Abdel-Wareth W XU Xu School of Astronautics Beijing University of Aeronautics and AstonauticeBeijing 100191China

The decomposition kinetic parameters of ammonium perchlorate(AP) having different grain size(10-390 μ m) were investigated through simultaneous DSC / TGA(differential scanning calorimetry / thermal gravimetric analysis) analyzer in a dynamic nitrogen atmosphere under heating rate of 40K / *** kinetic parameters such as activation energy and pre-exponential factor were determined by the modified isoconversional *** Brurzauer-Emmett-Teller(BET)-method was applied to measure AP specific surface *** results show that the higher the AP particle size the lower the determined kinetic parameters and are matched with some important literatures.

关键词： ammonium perchlorate particle size specific surface area thermal decomposition thermogravimetry

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Catalytic thermal decomposition of ammonium perchlorate by a series of lanthanide EMOFs

引用

Journal of Rare Earths 2023年第4期41卷 516-522页

作者： Jinhao Zhang Bo Jin Wenjia Hao Yulan Song Chenjie Hou Tao Huang Rufang Peng State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China

Given their unique and excellent properties,metal-organic frameworks(MOFs)materials have been used in many scientific *** use energetic materials as ligands,which can provide part of the energy for the system while catalyzing ammonium *** energetic material 1.1'-dihydroxyazotetrazole(H_(2)AzTO),as a high-energy nitrogen-rich material,was selected as a *** kinds of La^(3+),Ce^(3+),Pr^(3+),Nd^(3+),and Sm^(3+)lanthanide EMOFs were synthesized and *** crystal X-ray diffraction tests were conducted to obtain the crystal structures of EMOFs 1-5,which indicate that they have similar crystal *** thermal stabilities of EMOFs 1-5,which are obtained by differential scanning calorimetry(DSC)tests,are improved compa red with that of the *** results of thermicdecomposition of ammonium perchlorate(AP)and AP mixtures with 10 wt%EMOFs 1-5 show that except for AP mixed with 10 wt%co mpound 2,the high-temperature decomposition peak tempe rature of AP mixed with other compounds is significantly advanced(up to 59.3-88.3 K),and the decomposition of AP is continuous and *** 3-5 have good application prospects for the catalytic thermicdecomposition of AP.

关键词： 1 1'-dihydroxyazotetrazole EMOFs Catalytic thermal decomposition ammonium perchlorate Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Thermal decomposition of ammonium perchlorate catalyzed with CuO nanoparticles

引用

Defence Technology（防务技术） 2019年第6期15卷 868-874页

作者： Sherif Elbasuney M.Yehia Head of Nanotechnology Research Center School of Chemical EngineeringMilitary Technical College

ammonium perchlorate(APC)is the most common oxidizer in use for solid rocket propulsion *** its initial thermal decomposition is an endothermic process that requires 102.5 J·g^-*** manner involves high activation energy and could render high burning rate *** study reports on the sustainable fabrication of CuO nanoparticles as a novel catalyzing agent for APC *** CuO nanoparticles with consistent product quality were fabricated by using hydrothermal *** micrographs demonstrated mono-dispersed particles of 15 nm particle *** diffractogram demonstrated highly crystalline *** synthesized colloidal CuO particles were effectively coated with APC particles via co-precipitation by using fast-crash solvent-antisolvent *** impact of copper oxide particles on APC thermal behavior has been investigated using DSC and TGA *** demonstrated an initial endothermic decomposition stage at 242℃ with subsequent two exothermic decomposition stages at 297,8℃ and 452.8℃ *** 1 wt%,copper oxide offered decrease in initial endothermic decomposition stage by 30%.The main outcome of this study is that the two main exothermic decomposition peaks were merged into one single peak with an increase in total heat release by 53%.These novel features can inherit copper oxide particles unique catalyzing ability for advanced highly energetic systems.

关键词： ammonium perchlorate Catalyst Thermal behavior Energetic systems Catalyzed propellants

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：