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Thermite powder

The following igniters, found in chapter 3, may be used to initiate thermite Powdered Aluminum—Sulfur Pellets (0207), Magnesium Powder—Barium Peroxide Igniter (0210), and Subigniter forThemute (0211). [Pg.301]

Thermite is essentially a mixture of ca 73 wt % powdered iron(III) oxide, Fe202, and 27 wt % powdered or granular aluminum. The aluminum has a... [Pg.400]

A promising discovery for increasing the ignitabiiity of Thermite (Voi 7,173-R Ref 134, pp 3—5) mixts has been the admixture of Ni powder (Ref 29). The basis for this finding... [Pg.989]

Lead oxide reacts violently with numerous metals such as sodium powder (immediate ignition), aluminium (thermite reaction, which is often explosive), zirconium (detonation), titanium, some metalloids, boron (incandescence by heating), boron-silicon or boron-aluminium mixtures (detonation in the last two cases). Finally, silicon gives rise to a violent reaction unless it is combined with aluminium (violent detonation). It also catalyses the explosive decomposition of hydrogen peroxide. [Pg.232]

In a thermite process to produce chromium metal, the mechanically-mixed ingredients were ignited in a large crucible and the reaction proceeded smoothly. When the mixer broke down, manual mixing was used but gave poorer dispersion of the constituents. An explosion after ignition is attributed to a high local concentration of sodium chlorate and aluminium powder in the mixture. [Pg.29]

A mixture of aluminium powder and hot copper oxide exploded violently during mixing with a steel shovel on an iron plate. The frictional mixing initiated the thermite-like mixture [1]. Such mixtures are now used in electro-explosive devices [2], Two cases of violent explosions after adding scrap copper to molten aluminium are discussed. In both cases, when some undissolved copper with adhering aluminium and oxide dross was removed from the furnace, the explosions occurred outside the melting furnace [3],... [Pg.30]

Aluminium powder ignites in chlorine without heating, and foil reacts vigorously with liquid bromine at 15°C, and incandesces on warming in the vapour [1], The metal and iodine react violently in the presence of water, either as liquid, vapour or that present in hydrated salts [2], Moistening a powdered mixture causes incandescence and will initiate a thermite mixture [3],... [Pg.33]

Many metal oxo-compounds (nitrates, oxides and particularly sulfates) and sulfides are reduced violently or explosively (i.e. undergo thermite reaction) on heating an intimate mixture with aluminium powder to a suitably high temperature to initiate the reaction. Contact of massive aluminium with molten salts may give explosions [1], Application of sodium carbonate to molten (red hot) aluminium caused an explosion [2]. [Pg.35]

A mixture of the 3 compounds exploded violently during mixing. Previously the mixture had been accidentally ignited by a spark. Aluminium powder is incompatible with oxidants, and its mixture with titanium dioxide is a thermite-like combination. [Pg.1379]

In demonstrating the use of powdered aluminium to reduce the oxide in a thermite-type reaction, the mixture must be heated behind a safety screen because of the small explosion produced [1]. Consolidation of the thermite mixture into a high-density composite gives chemical heat sources which are safe to handle [2],... [Pg.1501]

An attempted thermite reaction with aluminium powder and copper(II) oxide in place of iron(III) oxide caused a violent explosion. An anonymous comment suggests that a greater reaction rate and exothermic effect were involved, and adds that attempted use of silver oxide would be even more violent [1]. An explosion... [Pg.1501]

An intimately powdered mixture, usually ignited by magnesium ribbon as a high-temperature fuse, reacts with an intense exotherm to produce molten iron and was used formerly (before the advent of gas or arc welding) in the commercial thermite welding process. Incendive particles have been produced by this reaction on impact between aluminium and rusty iron. (The term thermite reaction has now been extended to include many combinations of reducing metals and metal oxides) [1], Some accidents in demonstrating the thermite reaction are described [2],... [Pg.1553]

Crozier, T. H., HMInsp. Expl. Spec. Rept. 237, London, HMSO, 1929 A 20 t quantity of an incendiary bomb mixture of the finely powdered oxide, aluminium and sulfur became accidentally ignited and burned with almost explosive violence. It is similar to thermite mixture. [Pg.1555]

Potassium perchlorate Metal powders See other thermite reactions... [Pg.1761]

Bentzinger, von R. et al Praxis Naturwiss. Chem., 1987, 36, 38 A priming mixture of magnesium powder and barium peroxide to ignite thermite mixture was to be prepared, but as no barium peroxide was available, sodium peroxide was used instead. Some time after preparation, the mixture ignited spontaneously, because sodium peroxide, unlike barium peroxide, is very hygroscopic and forms hot cone, hydrogen peroxide from contact with atmospheric moisture. See Carbon dioxide, etc., above... [Pg.1826]

Mixtures of the oxide with aluminium powder give a violent or explosive thermite reaction on heating. Finely divided sodium ignites on admixture with the oxide, and a mixture of the latter with zirconium explodes on heating. Titanium is also oxidised violently on warming. [Pg.1838]

To produce molten iron aboard ships, the Navy uses the thermite reaction, which consists of mixing iron(III) oxide (rust) with powdered aluminum, igniting it, and producing aluminum oxide as a by-product. AH° for aluminum oxide is -1669.8 kJ/mole, and that for iron(III) oxide is -822.2 kJ/mole. [Pg.71]

According to reports from Los Alamos National Laboratory (Son 2005) nanoaluminium powders with particle size as small as eight nanometres can be combined with metal oxides to make highly energetic explosives. Called super-thermite, the combined powders are said to increase the chemical reaction speed by a factor of a thousand because of its much larger surface area. [Pg.572]

FERROALLOY POWDERS, FINELY DIVIDED METALS, THERMITE REACTIONS... [Pg.234]

Thermite welding is used for joining iron rails and also for liberating elements such as W and V from their oxides. The welding process involves heating a mixture of aluminium powder and hematite (thermite) the vigorous reaction which results produces AI2O3 and iron, i. e. [Pg.521]

Manganese(lI,III) oxide is reduced to manganese metal when heated with powdered aluminum (the Thermite process). The reaction is vigorous and exothermic ... [Pg.552]

One of the most energetic examples of chemical replacement is so powerful that it produces molten iron. This makes it very useful in remote places for on-the-spot repairs to iron structures. Called the Thermit process, it uses a mixture of powdered aluminum metal and iron oxide. [Pg.14]

For larger sizes, eg, 15.3cm, a shell was designed which contained units of thermite or other incendiary materials held in perforated cases. These units were ignited from a central tube and expelled from the front of the shell by the explosion of the powder charge located in the base... [Pg.335]

BM. 1. per galleria - gray powder consisting of TNT, AN thermite Trauzl test value 440cc... [Pg.409]

One of the best-known gasless reactions is Thermite which is comprised of a mixt of A1 powder St iron oxide ... [Pg.668]

Aluminium powders are also used for the thermite reaction. This is the reaction traditionally used to weld rail tracks together in situ 2Al(s)+Fe203(s)=2Fe(l) + Al203(s), which produces so much heat that molten iron is produced, but it can also be used to produce other less easily reduced metals, such as Mo, from their oxides. Using nanometer particles dramatically improves performance, and these reactions are used as priming reactions for munitions and in fireworks. [Pg.435]

The basic reaction underlying the combustion of many gasless delay formulations is the Goldschmidt or thermite reaction where a metal powder and a metallic oxide interact in an oxidation-reduction reaction manner with the evolution of a large amount of heat but very little or no gas. Consequently, these formulations are used where no vent or very little vent is provided in the ammunition. Gasless delay formulations tend to burn faster under higher consolidation as the points of contact of fuel and oxidizer increase. This is because the reaction in this case is a solid state reaction by diffusion. [Pg.357]

Thermites, pyrophoric metal powders, high explosive incendiaries (HEI)... [Pg.375]


See other pages where Thermite powder is mentioned: [Pg.271]    [Pg.76]    [Pg.271]    [Pg.271]    [Pg.263]    [Pg.121]    [Pg.204]    [Pg.271]    [Pg.76]    [Pg.271]    [Pg.271]    [Pg.263]    [Pg.121]    [Pg.204]    [Pg.336]    [Pg.393]    [Pg.521]    [Pg.224]    [Pg.397]    [Pg.1380]    [Pg.1761]    [Pg.837]    [Pg.765]    [Pg.941]    [Pg.329]    [Pg.343]    [Pg.344]    [Pg.377]   
See also in sourсe #XX -- [ Pg.917 ]




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