Investigation of Thermal Properties of Some Nitrate Ozidants in Tin-Fuelled Pyrotechnic Systems
To investigate relative reactivity of different oxidants in solid state reactions of pyrotechnic mixtures, thermal properties of Sn+Sr(NO3)2, Sn+Ba(NO3)2 and Sn+KNO3 pyrotechnic systems have been studied by means of TG, DTA and DSC methods. For the Sn+Sr(NO3)2 pyrotechnic system, the tin oxidation by strontium nitrate was complicated between 420 to 610 ℃. By replacing strontium with barium in the nitrate salt, the mixture sensitivity decreases so Sn+Ba(NO3)2 shows a higher ignition temperature at around 462 ℃. In the Sn+KNO3 system, oxidation of tin powder occurs in a KNO3 melt at temperatures above 480 ℃ in argon atmosphere. The apparent activation energy (E), ?G#, ?H# and ?S# of the combustion processes were obtained from the DSC experiments. Based on these kinetic data and ignition temperatures, the relative reactivity of these mixtures was found to obey in following order: Sn+Sr(NO3)2> Sn+Ba(NO3)2 >Sn+KNO3.
pyrotechnic ozidant effect nitrate salts tin powder thermal decomposition kinetic parameter
HOSSEINI Seyed Ghorban ESLAMI Abbas
Faculty of Chemistry, University of Mazandaran, P.O.Box 47416-95447, Babolsar, Iran
国际会议
2009 International Autumn Seminar on Propellants,Ezplosives and Pyrotechnics(2009国际推进剂、炸药、烟火技术秋季研讨会)
昆明
英文
1-8
2009-09-22（万方平台首次上网日期，不代表论文的发表时间）