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:''Not to be confused with the barbiturate amytal.'' Amatol is a highly explosive material made from a mixture of TNT and ammonium nitrate. The British name originates from the words ammonium and toluene (a raw material of TNT). Similar mixtures (1 part dinitronaphthalene and 7 parts ammonium nitrate) were known as Schneiderite in France. Amatol was used extensively during World War I and World War II, typically as an explosive in military weapons such as aircraft bombs, shells, depth charges, and naval mines.〔Brown, G.I. (1998) The Big Bang: a History of Explosives'' Sutton Publishing ISBN 0-7509-1878-0 pp.158-163〕 It was eventually replaced with alternative explosives such as composition B, torpex, and tritonal. ==Manufacture and use== Amatol exploits synergy between TNT and ammonium nitrate. TNT has higher explosive velocity and brisance, but is deficient in oxygen. Oxygen deficiency causes black smoke residue〔http://www.youtube.com/watch?v=vb3y6m-buco〕 from a pure TNT explosion. The oxygen surplus of ammonium nitrate increases the energy release of TNT during detonation. Depending on the ratio of ingredients used, amatol leaves a residue of white or grey smoke after detonation. Amatol has a lower explosive velocity and correspondingly lower brisance than TNT but is cheaper to make. Amatol allowed supplies of TNT to be expanded considerably, with little reduction in the destructive power of the final product, so long as the amount of TNT in the mixture did not fall below 60%. Mixtures containing as little as 20% TNT were for less demanding uses. TNT is 50% deficient in oxygen. Amatol is oxygen balanced and is therefore more effective than pure TNT when exploding underground or underwater. RDX also has a negative oxygen balance. Relatively unsophisticated cannery equipment can be adapted to amatol production. TNT is gently heated with steam or hot water until it melts, acquiring the physical characteristics of a syrup. Then the correct weight ratio of powdered ammonium nitrate is added and mixed in. Whilst this mixture is still in a molten state, it is poured into empty bomb casings and allowed to cool and solidify. However, the lowest grades of amatol could not be produced by casting molten TNT. Instead, flaked TNT was thoroughly mixed with powdered ammonium nitrate and then compressed or extruded.〔 The colour of amatol ranges from off-white to slightly yellow or pinkish brown, depending on the mixture used and remains soft for long periods of storage. It is also hygroscopic, which complicates long-term storage.〔Davis, Tenney L. (1943) ''The Chemistry of Powder & Explosives'' Angriff Press ISBN 0-913022-00-4 pp.141-153&494〕 To prevent moisture problems, amatol charges were coated with a thin layer of pure molten TNT or alternatively bitumen. Long-term storage was rare during wars because ammunition charged with amatol were generally used soon after manufacture. Amatol should not be stored in containers made from copper or brass, as it can form unstable compounds sensitive to vibration.〔 Pressed, it is relatively insensitive but may be detonated by severe impact, whereas when cast, it is extremely insensitive. Primary explosives such as mercury fulminate were often used as a detonator, in combination with an explosive booster charge such as tetryl. The explosive charges hidden in HMS ''Campbeltown'' during the St. Nazaire Raid of 1942 contained amatol. The British X class midget submarines which planted explosive charges beneath the German battleship ''Tirpitz'' in September 1943 carried two "saddle charges" containing four tons of amatol. Warheads for the German V-1 flying bomb and V-2 rockets also contained amatol. A derivative of amatol is amatex, consisting of 51% ammonium nitrate, 40% TNT, and 9% RDX. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Amatol」の詳細全文を読む スポンサード リンク
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