Energy Characteristics of Solid Propellant Containing 5-Amino-tetrazolium Nitrate(5-ATEZN)

Under standard condition(chamber pressure p_c:nozzle exit pressure p_e =70:1),the energy characteristic parameters of solid propellant containing 5-amino-tetrazolium nitrate(5-ATEZN),a novel kind of high energy compounds with high nitrogen content,were calculated by the least free energy method.Results show that specific impulse of 5-ATEZN monopropellant is 2371.38 N · s · kg~(-1),which is similar to that of RDX and HMX monopropellant.Moreover,the oxygen balance of 5-ATEZN(-10.8%) is much higher than that of RDX and HMX.Specific impulse and characteristic velocity of HTPB propellant decrease with substituting 5-ATEZN for the ingredient AP or RDX.But for GAP propellant,specific impulse and characteristic velocity are characterized by a parabola with substituting 5-ATEZN for the ingredient AP.The maximum specific impulse can reach 2580.62 N · s · kg~(-1),which is 17.93 N ? s ? kg~(-1)higher than that of previous formula without 5-ATEZN.Since 5-ATEZN has no chlorine,it' s helpful to reduce the characteristic signal of propellant.Therefore,substituting 5-ATEZN for the ingredient AP appropriately is a feasible approach to achieve the target of higher-energy and less-smoke for GAP propellant.