Effect of the nanometer carbonate on combustion properties of composite solid propellants

The effects of nanometer carbonate on the combustion properties of AP/Al/HTPB,AP/RDX/Al/HTPB and low burning rate NEPE propellant were investigated.The results show that,when nanometer carbonate is added,the burning rate pressure exponent of AP/Al/HTPB propellant is decreased to less than 0.2 in the pressure ranges of 10～18 MPa and 4～10 MPa,at the same time,the burning rate is greatly decreased.The burning rate pressure exponent of AP/RDX/Al/HTPB propellant is decreased to about 0.26 in the ranges of 10～18 MPa.The burning rate pressure exponent of low burning rate NEPE propellant is decreased from about 0.77 to 0.55 in the ranges of 4～9 MPa.Thus,the addition of nanometer carbonate is a feasible way to decrease the burning rate pressure exponent of composite solid propellants.