Advanced crystalline energetic materials modified by coating
1. Introduction. Energetic materials (EMs), including propellants, explosives and pyrotechnics (i.e. composite EMs), are widely used in the military and civil applications [1].In pyrotechnics, nano-aluminum fuel is mixed with different important metal oxide such as CuO [2], Co 3 O 4 [3], MoO 3, WO 3 [4].While in propellants or explosives, the currently …Web
اقرأ أكثرMetals | Free Full-Text | Comparative Study on Combustion
In order to reduce the ignition temperature and improve the combustion efficiency of aluminum powder, three aluminum-based alloy fuels, Al–Mg, Al–Zn, and Al–Si–Mg, were prepared by the atomization method. The oxidation, ignition, and combustion performance of alloy fuels were investigated, and the results showed that, …Web
اقرأ أكثرEffect of Nanosize Zinc Ferrite on Thermolysis of Ammonium Perchlorate
Ammonium perchlorate (AP) is widely used as a propellant and explosive, and in pyrotechnics. It is mainly applied as a rocket propellant oxidizer due to its high oxygen content and the large amount of gas released during its decomposition. In the work described herein, nano zinc ferrite (ZnF) was synthesized by a coprecipitation method …Web
اقرأ أكثرRecent advances in catalytic combustion of AP-based composite …
The TG/DSC study showed that nanosized β-Cu could be a promising additive for accelerating the thermal decomposition of ammonium perchlorate (AP). Nanoscale triaminoguanidine nitrate (TAGN) having average particle size of 218.7 nm was synthesized by Wang et al. [101] for accelerating the decomposition of AP based composition of …Web
اقرأ أكثرMethod for preparing small particle size coated ammonium perchlorate
A method for preparing aziridine coated ammonium perchlorate (AP) of weightedian diameters (WMD) ranging from about 0.25 to about 5.0 micrometers is disclosed. The method employs either an unlined stainless steel or a polyurethane lined vibro-energy grinding mill wherein a high purity aziridine compound is used as the grinding aid and …Web
اقرأ أكثرEffect of Metal Nanopowders on the Performance of …
The effects of different types of nano-sized metal particles, such as aluminum (nAl), zirconium (nZr), titanium (nTi), and nickel (nNi), on the properties of a variety of solid rocket propellants (composite, fuel-rich, …Web
اقرأ أكثرDecomposition of ammonium perchlorate: Exploring catalytic activity …
Ammonium perchlorate (AP) possesses the advantages of great oxidation performance, large combustion gas production and high effective oxygen content. Thus, in the formulation of composite solid propellant, AP can usually be used as an important oxidant with the dosage of 60–90% of the total mass of propellants [1–3].Web
اقرأ أكثرEnhanced decomposition of laminated ammonium perchlorate …
The oxygen bomb test results show that the micro-/nano-layered structure can significantly improve the sample's combustion heat value. ... Ammonium perchlorate (NH 4 ClO 4, AP) has been widely used in propellants and polymer-bonded ... the gap size was between 100–300 μm, and the thickness of the single layer is 50–200 μm. By further ...Web
اقرأ أكثرEffects of Ammonium Perchlorate Particle Size, Ratio, and Total
Effects of Ammonium Perchlorate Particle Size, Ratio, and Total Contents on the Properties of a Composite Solid Propellant | Semantic Scholar. DOI: …Web
اقرأ أكثرLarge scale synthesis of copper nickel alloy nanoparticles
Stergar et al. 8 report on the preparation of Ni 0.725 Cu 0.275 with a particle size of 3–10 nm by micro emulsion technique. The particles were found to be super paramagnetic with a controlled ...Web
اقرأ أكثرThermal decomposition of mechanoactivated ammonium perchlorate
Ammonium perchlorate was grinded up and activated in an Activator-2SL planetary mill (Company "Activator", Novosibirsk [23]) with steel balls and grinding bowls. Activator-2SL has two drums with a volume of 250 ml, the speed of rotation of the planetary disk is 1000 rpm, the speed of rotation of bowls is 1500 rpm.Web
اقرأ أكثرResearch on Grinding Characteristics and Comparison of Particle-Size
In addition, the length of the tumbling mill is 240 mm. The medium of the mill is iron ball with diameter of 25 mm. The critical rotational speed of the mill is 101.4 r/min. The type of grinding is wet milling. The power of tumbling mill is 0.55 kW. Particle size distribution of two types of ores' feeding samples are shown in Table 1.Web
اقرأ أكثرsbm/sbm ammonium perchlorate grinding mill manufacture in …
You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.Web
اقرأ أكثرResearch on Grinding Law and Grinding Parameters …
Therefore, in order to facilitate the research, the particle size of −0.15 + 0.038 mm in the grinding products of polymetallic complex ores is regarded as qualified particle size, the particle size of +0.15 mm is regarded as undergrinding particle size, and the particle size of −0.038 mm is regarded as overgrinding particle size [29,30,31].Web
اقرأ أكثرEvolution of the Micropore Structure of Ammonium Perchlorate
Ammonium perchlorate (AP) is a common oxidant in solid propellants, and its thermal decomposition characteristics at low temperatures (less than 240 °C) are key to the study of the thermal safety of propellants. Here, the low-temperature thermal decomposition characteristics of AP were investigated at 230 °C. The micromorphology …Web
اقرأ أكثرSize and Shape of Ammonium Perchlorate and their Influence on
In the present study, different methods for size and shape characterisation are discussed and effect of size and shape of AP on composite propellant properties are …Web
اقرأ أكثرAmmonium Perchlorate | Formula, Properties & Application
The chemical formula for ammonium perchlorate, NH 4 ClO 4, indicates that it is composed of ammonium ions (NH 4+) and perchlorate ions (ClO 4– ). It is an inorganic compound that is odorless and colorless, appearing as a white crystal at room temperature. Its molar mass is approximately 117.49 g/mol. Solubility: Ammonium perchlorate is …Web
اقرأ أكثرMicrobial perchlorate reduction: rocket-fuelled metabolism
From April 2003 onwards, perchlorate has been manufactured and used in more than 150 industrial facilities throughout the United States and more than 90 perchlorate releases have been reported in ...Web
اقرأ أكثرThe ignition and combustion performances of core-shell Al-based
The combustion of solid propellants is greatly dependent on the properties of ammonium perchlorate ... which is probably due to the vacant orbital in the transition metal atoms serving as bridges enabling acceleration of the electron transfer of ClO 4 ... The micro-sized aluminum powder (μ-Al, purity >99.9%, with the mean particle size of 5 ...Web
اقرأ أكثرAluminum Agglomeration in Solid-Propellant Combustion
Effects of Ammonium Perchlorate Particle Size on the Aluminum Agglomeration in Primary Combustion of the Ammonium Perchlorate/Aluminum Binary Mixture with a High Aluminum Content ... Vol. 33, No. 9. Quench Collection and Artificial Neural Network Prediction of Micro and Ultra-fine Aluminum Agglomeration Phenomena …Web
اقرأ أكثرEnErgEtic MatErials – ParticlE tEchnology
An oscillating mill, a pin mill and a jet mill are available for dry milling. Using the pin mill, ammonium perchlorate, ammonium nitrate or potassium nitrate can be milled to obtain …Web
اقرأ أكثرPrediction of Particle Size of Ammonium Perchlorate during …
The effect of mill rpm on ammonium perchlorate grinding is presented in Table 1 and Fig. 2. In these ... 5 0.75 5000 1000 38.48 35.58 2.90 7.53 Table 1. Effect of mill revolutions per minute on average particle size ... JAIN, et al.: PREDICTION OF PARTICLE SIZE OF AMMONIUM PERCHLORATE DURING PULVERISATION Thus, it is clear from Table 1 …Web
اقرأ أكثرPerchlorate
Perchlorate. Robert D. Morrison, ... P. Brent Duncan, in Environmental Forensics, 1964. 9.2 PERCHLORATE CHEMISTRY. Perchlorate (CLO 4 −) is a non-volatile anion composed of one chlorine atom surrounded by four oxygen atoms and has a molecular weight of 99.45.The central chlorine atom has an oxidation number of +7, making it the most …Web
اقرأ أكثرA Vacuum Ultraviolet Photoionization Study on the
thermolysis of ammonium perchlorate (NH4ClO4) in vacuo in the temperature ranges of 493–553 and 653–723 K (Table 1). 7 The authors concluded that at low temperatures, only 30% of the reactant decays; the solid residue was found to be porous suggesting that the decomposition takesWeb
اقرأ أكثرNanomaterials | Free Full-Text | Nanometer Ammonium Perchlorate …
Nanometer (nano) ammonium perchlorate (AP) and ammonium nitrate (AN) were prepared with 2D network structures by the ultra-low temperature spray method. Scanning electron microscopy (SEM), X-ray diffractometry (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis/infrared spectrometry (TG-IR) were …Web
اقرأ أكثرEnhanced decomposition of laminated ammonium perchlorate composite …
The laminated AP composite was prepared by ice-template induced self-assembly method. The process of self-assembly is shown in Fig. 1. Firstly, 2 g AP with Fe (NO 3) 3 ·9H 2 O at different ratios ...Web
اقرأ أكثرMICRONIZER JET MILL
Ammonium Perchlorate Barium Ferrite Barium Titanate Barytes Bentonite Bismuth xide Carbon Black Chrome Oxides ... 90 75 10 3 3000 ... contact our customer test center. Mill Size Dia. (in.) Sturtevant, Inc. 348 Circuit Street Hanover, MA 02339 PHONE: 781-829-6501 FAX: 781-829-6515 TOLL FREE: 800-992-0209 E-MAIL: …Web
اقرأ أكثر(PDF) Prediction of Particle Size of Ammonium Perchlorate during
PDF | Ammonium perchlorate has been pulverised by an impact mill (air classifier mill) to study the influence of different operating parameters, viz.,... | Find, read …Web
اقرأ أكثرEffect of aluminum morphology on thermal decomposition of ammonium
In this paper, two kinds of flake aluminum powder are prepared by bidirectional rotation mill using the spherical aluminum powder (Al-1) as raw materials. The morphology and particle size distribution of Al powder are analyzed using scanning electron microscopy and laser particle size analyzer. At the same time, the catalytic …Web
اقرأ أكثرAmmonium Perchlorate: Safety and Handling Guidelines
Ammonium perchlorate (AP) is a colorless or white inorganic compound with the formula NH4ClO4, known for being a powerful oxidizer. It is a white crystalline substance that is stable in its pure form at ordinary temperatures but decomposes at 150°C or above. When mixed with finely divided organic materials, AP becomes explosive and …Web
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