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A pyrolant (from Greek ''pyros'', fire) is an energetic material that generates hot flames upon combustion. Pyrolants are metal-based pyrotechnic compositions containing virtually any oxidizer. The term was originally coined by Kuwahara in 1992,〔T. Kuwahara, T. Ochiachi, Burning Rate of Mg/TF Pyrolants, ''Proceedings of the 18th Int. Pyrotechnics Seminar'', 1992, p. 539.〕 in a paper on magnesium/Teflon/Viton, to distinguish between compositions that serve as propellants and those yielding hot flames which are not necessarily suitable for propellant purposes. The word ''thermite'' also refers to metal-oxidizer mixtures, and is used interchangeably with, and more commonly than, "pyrolant". A similar common term is ''propellant'', which describes either a homogeneous or composite material that generates thrust upon combustion, but which may contain fuels instead of or in addition to the metals contained in thermites. Metal-based pyrotechnic compositions, that is to say thermites or pyrolants, are generally characterized by high combustion temperatures (> 2000 K) and high amounts of condensed reaction products at equilibrium conditions such as metal oxides, fluorides and soot. Typical pyrolants find use as pyrotechnic initiators (Zr/BaCrO4)〔() T. Kuwahara, T. Kohno, C. H. Wang, Static Electric Sensitivity Characteristics of Zr/, Pyrolants, ''Prop., Explos., Pyrotech. 29'' 2004, 56. 〕 or Zr/KClO4, illuminating flare (Mg/NaNO3)〔() J. R. Ward, L. J. Decker, A. W. Barrows, Burning Rates of Pressed Strands of a Stoichiometric Magnesium-Sodium Nitrate Mix, ''Combust. Flame 51'' 1983, 121.〕 and decoy flare compositions (Mg/(C2F4)n)〔() E.-C. Koch Metal/Fluorocarbon Pyrolants: VI. Combustion Behaviour and Radiation Properties of Magnesium/Poly(Carbon Monofluoride) Pyrolant, Prop''., Explos., Pyrotech. 30'' 2005 209.〕 ==References== 〔 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「Pyrolant」の詳細全文を読む スポンサード リンク
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