Burning Characteristics of Some Guanidinium 1,5'-bis-1H-Tetrazolate/ Ammonium Nitrate/Additive Mixtures

摘要

Burning characteristics of some guanidinium l,5'-bis-lH-tetrazolate (G15B)/ammonium nitrate (AN) /additive mixtures were examined through linear burning rate tests and closed vessel tests by using a chimney-type strand burner. Additives tested in this study were: manganese dioxide MnO_2, copper Cu, copper( Ⅰ) oxide Cu_2O, copper( Ⅱ) oxide CuO, basic cupric nitrate (BCN), activated carbon (AC), sodium nitrate NaCl, and silicon oxide SiO_2. Linear burning rate data of G15B/NH_4NO_3/additive mixtures, together with the degree-of-pressure-rise data, the rate-of-pressure-rise data and the temperature-rise data from the closed vessel tests were compared to those of guanidine nitrate (GN)/strontium nitrate (SrN)/BCN mixture. Linear burning rate test results show that all the additives tested enhanced the combustion of the original G15B/AN mixture, which did not burn even under 10 MPa (initial gauge pressure) N_2 atmosphere at 298 K, and that the mixture with AC or CuO additive was faster than GN/SrN/BCN mixture in the linear burning rate under the whole pressure range tested (0.1～10 MPa (initial gauge pressure)) while the mixture with Cu, Cu_2O, BCN or NaCl additive was faster under average ambient pressure over 5 MPa. It was also shown that γ for the mixtures with AC, Cu, Cu_2O, BCN or NaCl were, although slower than G15B/AN/CuO at 2 MPa, faster at 5 MPa for all former mixtures except G15B/AN/Cu and faster at 7 MPa or above for all former mixtures. Meanwhile, closed vessel test results show that all mixtures with one of the additives burnt completely three times out of three tests and that the mixture with Cu, Cu_2O, CuO or BCN additive was, although higher in the average temperature-rise, also higher in both the average pressure-rise and the average rate-of-pressure-rise, while the mixture with AC additive was higher in both the average pressure-rise and the average rate-of-pressure-rise and lower in the average temperature-rise.