ammonium perchlorate grinding techniques
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- ammonium perchlorate grinding techniques
Ammonium perchlorate (AP) is the most widely used oxidizer in modern CSP. Since AP account for 65e85 wt% of the total CSP, its thermal decomposition …
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In this study, we present the synthesis of Cu–Cr–Pb nanocomposites by a simple co-precipitation method and evaluate the catalytic performance of the as-fabricated Cu–Cr–Pb nanocomposites on the thermal decomposition of ammonium perchlorate (AP). The X-ray diffraction, scanning electron microscopy, transmission electron microscopy and …
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Brief Profile. Diss Brief Profile. The Brief Profile summarizes the non-confidential data on substances as it is held in the databases of the European Chemicals Agency (ECHA), including data provided by third parties. The Brief Profile is automatically generated; note that it does not currently distinguish between harmonised classification and ...
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The comminution of ammonium perchlorate has been most commonly accomplished by various grinding techniques. More recently, the increased demand for very fast burning propellants has increased the search for a practical process of producing even finer ammonium perchlorate particles, that is, particles having an average particle diameter of less ...
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US4115166A US05/003,548 US354870A US4115166A US 4115166 A US4115166 A US 4115166A US 354870 A US354870 A US 354870A US 4115166 A US4115166 A US 4115166A Authority US United States Prior art keywords ammonium perchlorate propellant divinylbenzene adduct butylene Prior art date Legal status (The legal status is an assumption and …
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Fluid energy mills usable for grinding or milling ammonium perchlorate, RDX or HMX and ammonium perchlorate hammer and pin mills and the following components. Больше примеров Результатов: 63, Время: 0.1259
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The combustion rate of ammonium perchlorate composite propellants (APCPs) can be considerably increased with the addition of nano-scale metals and metal oxides [1][2][3][4][5].
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The thermal decomposition of ammonium perchlorate in vacuo and under small initial pressures of nitrogen, to suppress sublimation, has been investigated in the temperature ranges 220 to 280°C and 380 to 450°C. The experimental techniques for following the decomposition and subsequent analysis of the products are described and gas analysis results given.
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Ammonium perchlorate (AP) is the workhorse oxidizer used in composite solid propellant. The doping of AP with transition metal compounds by physical mixing or cocrystallisation is a …
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The method involves obtaining a dispersion of ammonium perchlorate, grinding the suspension for 1 hour in the presence of grinding elements. The method is characterised by that the ammonium perchlorate is ground in a medium of …
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Other changes in manufacturing techniques, particularly relating to the oxidizer particle size reduction and control, such as fluid-energy mill-ground ammonium perchlorate, have produced significant improvements in burning rates. ... the bonding efficiency has been improved with the use of grinding aids employed in the manufacture of ammonium ...
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1. Introduction. Perchlorate (ClO 4 −), as an emerging pollutant, has been detected in drinking water and various edibles (Dyke et al., 2007, Shi et al., 2007, Srinivasan and Sorial, 2009, Yang and Her, 2011).Its detrimental effect as an inhibitor of iodide uptake by the thyroid is well-known. As a result, the secretion of thyroid hormones decreased, and …
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Ammonium perchlorate is an inorganic compound with the formula NH4ClO4. It is the salt of perchloric acid and ammonia. It is a powerful oxidizer, which explains its main use in solid propellants, such as rockets and missiles. It has been involved in a number of accidents, such as the PEPCON disaster.
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In the present work, copper ferrite was prepared by a simple and mild sol–gel method followed by low-temperature calcination, and characterized by various analytical techniques. The X-ray diffraction (XRD) analysis suggests that the copper ferrite with the spinel-type ferrite crystal forms have been successfully prepared. More crystal defects are observed …
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US3383180A US448697A US44869765A US3383180A US 3383180 A US3383180 A US 3383180A US 448697 A US448697 A US 448697A US 44869765 A US44869765 A US 44869765A US 3383180 A US3383180 A US 3383180A Authority US United States Prior art keywords ammonium perchlorate crystals crystallizer crystallization zone Prior art date 1965 …
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Ammonium Perchlorate, after grinding 30.8% [3] Polysulfide 16.4% p-Quinone dioximine (curing agent) 1.2% Diphenyl guanidine (curing accelerator) 0.1% Dibutyl phthalate 2.8% Aluminum powder (resonance suppressor) 1.8% Sulfur 0.1 (curing catalyst)% Magnesium oxide (curing catalyst) 0.6% ...
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The initiation portion consisted of 110 mg of HEP with a formulation of 80% ammonium perchlorate and 20% atomized aluminum which was inserted into a 14 mm long steel sleeve and pressed to a pressure of 2200 psi. Forty eight (48) mg of PETN was also inserted into the sleeve and also pressed to a pressure of 2200 psi.
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Ammonium perchlorate () is the most common oxidizer in use for solid rocket propulsion systems. However its initial thermal decomposition is an endothermic process that requires 102.5 J·g⁻¹.
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A method and apparatus for making finely particulate ammonium perchlorate by vapor phase reaction between gaseous ammonia and anhydrous perchloric acid vapor. The gaseous ammonia is preferably mixed with an inert carrier gas and the resulting mixture reacted with substantially pure, anhydrous perchloric acid vapor to form fine ammonium perchlorate particles.
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Ammonium perchlorate (AP) and ammonium dinitramide (ADN) In the case of thermal behavior, AP decomposes with two exothermic peaks, which needs to be merged for better combustion performances [59] . Therefore, in order to tune the thermal behavior and decrease the hygroscopicity of AP, coating of AP or intercalation with appropriate catalysts ...
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Introduction of TANYUN Solid Rocket Composite Propellant. TANYUN composite propellant is a kind of propellant composed of polymer binder: hydroxyl-terminated polybutadiene, solid powder oxidizer: ammonium perchlorate, powder metal fuel: aluminum, and other additional components. Composite solid rocket propellant is referred to as composite propellant, which is …
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The effectiveness of the burning rate accelerator, iron oxide (Fe 2 Ob.3), is enhanced, and a markedly improvement in the mechanical properties of a propellant composition are simultaneously achieved as a result of grinding a composite propellant paste in a roller mill instead of in a conventional sigma blade propellant mixer. The propellant paste is composed of …
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US3498759A US459571A US3498759DA US3498759A US 3498759 A US3498759 A US 3498759A US 459571 A US459571 A US 459571A US 3498759D A US3498759D A US 3498759DA US 3498759 A US3498759 A US 3498759A Authority US United States Prior art keywords crystals zone ammonium perchlorate crystallizer dissolving Prior art date 1965-05 …
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Crystallization is the most critical step in the manufacture of ammonium perchlorate, which determines the size, shape, morphological characteristics, crystal strength, grinding characteristics ...
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US3419899A US448710A US44871065A US3419899A US 3419899 A US3419899 A US 3419899A US 448710 A US448710 A US 448710A US 44871065 A US44871065 A US 44871065A US 3419899 A US3419899 A US 3419899A Authority US United States Prior art keywords ammonium perchlorate crystals crystallizer zone crystallization Prior art date 1965 …
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decomposition of ammonium perchlorate (AP). The X-ray diffraction, scanning electron microscopy, transmission electron microscopy and thermogravimetric analysis/dif-ferential scanning calorimetric techniques were employed to characterize the crystal phases, sizes and catalytic properties of as-obtained Cu–Cr–Pb nanocomposites, respectively.
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previous additive generations. Previous methods involved the mixing of dry powders by way of grinding or applying an ultrasonic bath to pulverize the larger agglomerates in the powder additive. Dry titania nanoparticles were mixed into hydroxyl terminated polybutadiene (HTPB) and ammonium perchlorate (AP) composite solid propellants.
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Ammonium Perchlorate Grinding Techniques. Ammonium Perchlorate Grinding Techniques Grinding Ammonium Perchlorate Grinding Techniques, Ball Mill, Hammer Mill, ... Ammonium Sulphate Factories In Jeddah; Read More
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grinding is carried out by circulation of the suspension consisting of ammonium perchlorate and a dispersion liquid with a ratio of through parallel, two ball mills and one meshaal working capacity of 08 m 3 for 1 to 10 hours to obtain the particle size of the oxidizer from 2 to 1 μm for a onetime download of lecithin and within 8 to 16 hours for …
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Previous methods involved the mixing of dry powders by way of grinding or applying an ultrasonic bath to pulverize the larger agglomerates in the powder additive. Dry titania nanoparticles were...
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Ammonium perchlorate (AP) is a very labile species composed of the perchlorate ion ClO − 4, with chlorine in an oxidation state of +7.The high oxygen content and good thermal stability of perchlorates have made them indispensable ingredients for the pyrotechnics industry and key ingredients in solid rocket propellants [].AP-based composite …
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