Topic
Ammonium perchlorate
About: Ammonium perchlorate is a research topic. Over the lifetime, 2359 publications have been published within this topic receiving 33412 citations. The topic is also known as: AP.
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TL;DR: In this paper, an attempt was made to prepare fine sphere ammonium perchlorate (AP) by the spray-drying method, and fine droplets of AP solution were prepared by an ultrasonic atomizer, and the droplets were dried by surrounding air at a low inlet temperature and low flow rate.
Abstract: Recently it has become necessary to prepare Ammonium Perchlorate (AP) composite propellant with a higher burning rate. In general, the burning rate of AP composite propellant increases as the particle size of AP in propellant decreases. In this study, an attempt was made to prepare fine sphere AP by the spray-drying method. Fine droplets of AP solution were prepared by an ultrasonic atomizer, and the droplets were dried by surrounding air at a low inlet temperature and low flow rate. When the concentration of AP solution was 10wt%, the flow rate of the surrounding air 1.0×10-2m3/s, and the inlet temperature of surrounding air was 313K, fine sphere AP was prepared. The mean volume-surface diameter and the specific surface areas of the fine sphere AP prepared were 2.7×10-6m and 3.1×103m2/kg, respectively.
11 citations
Patent•
11 Jun 1968
TL;DR: An improved extrudable, high energy solid propellant composition consisting essentially of the copolymer of vinylidene fluoride and perfluoropropylene (Viton), an inorganic oxidizer such as ammonium perchlorate, potassium perchlorates or ammonium nitrate, and a metal powder such as aluminum, beryllium, magnesium or zirconium is presented in this paper.
Abstract: An improved extrudable, high energy solid propellant composition consisting essentially of the copolymer of vinylidene fluoride and perfluoropropylene (Viton), an inorganic oxidizer such as ammonium perchlorate, potassium perchlorate or ammonium nitrate, and a metal powder such as aluminum, beryllium, magnesium or zirconium. This composition is extrudable into any suitable shape and has a very high percentage theoretical maximum density so as to be practical for utilization in rocket motors for propulsion.
11 citations
TL;DR: In this article , a self-templated approach is adopted to construct hierarchical hollow double-shelled Co 3 O 4 using cobalt glycerate solid spheres as precursors.
11 citations
TL;DR: In this paper, the ammonium perchlorate (AP) compositions were synthesized on the nanoscale, where AP particles were dispersed in an organogel matrix (20"wt-%) and the overall composition had an oxygen balance equilibrated towards CO2.
Abstract: In order to improve the safety of energetic compositions, whether it has to be worked with less sensitive materials that are often less powerful or with high energetic materials crystals with improved purity and microstructure quality. A way to modify the crystal quality of an energetic material is to structure the matter on the nanoscale: the crystals size reduction should induce impurity modifications in the particles. That is one of the reasons why interest in nanoenergetic compositions that contain high energetic material (≥ 90 wt-%) and an organic matrix (≤ 10 wt-%) that takes part in constraining the explosive to organize itself on the nanoscale arose. The key point is to find or synthesize the matrix. In the course of this study, first ammonium perchlorate compositions structured on the nanoscale were synthesized (150 nm AP particles (80 wt-%) dispersed in an organogel matrix (20 wt-%)). The formulation process was based on the impregnation of porous organogels with a saturated aqueous solution of ammonium perchlorate followed by freeze drying. The overall composition had an oxygen balance equilibrated towards CO2. These AP nanocompositions show better safety behavior during combustion than there equivalent macrocompositions, while they burn more rapidly, with no degradation of their impact and thermal sensitivity properties. The formulation process of RDX nanocompositions is more complex as the solvent used is γ-butyrolactone which can not be directly frozen dried. However, first RDX nanocompositions were formulated and characterized using differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray powder diffraction, and drop weight impact. Lately compressions of these RDX compositions were performed, prior to gap-test experiments.
11 citations
Patent•
10 Dec 1998
TL;DR: This article proposed pyrotechnic mixtures generating non-toxic gases characterised in that they essentially consist of a cross-linkable reducing binder based on epoxy resin or silicone resin, an oxidising filler based on ammonium perchlorate and a chlorine scavenger such as sodium nitrate and energetic additives consisting of a cupric compound such as cupric oxide or basic copper nitrate.
Abstract: The invention concerns pyrotechnic mixtures generating non-toxic gases characterised in that they essentially consist of a cross-linkable reducing binder based on epoxy resin or silicone resin, an oxidising filler based on ammonium perchlorate and a chlorine scavenger such as sodium nitrate and energetic additives consisting of a cupric compound such as cupric oxide or basic copper nitrate and of a nitrogenated organic compound such as, for example, nitroguanidin or guanidine nitrate. The filler can also contain potassium perchlorate. Said compositions burn at moderate temperatures generating gases rich in nitrogen and poor in nitrogen oxides and carbon monoxide. They are most suitable as pyrotechnic load for gas generators designed to inflate protective air bags for motor vehicle passengers.
11 citations