每年出版 6 期
ISSN 打印: 2150-766X
ISSN 在线: 2150-7678
Indexed in
MODERN AIB12/KNO3-BASED PYROTECHNIC SYSTEM: COMBUSTION CHARACTERISTICS AND PERFORMANCE STUDY FOR THE IGNITER APPLICATION
摘要
In this study, aluminum dodecaboride (AlB12)- and potassium nitrate (KNO3)-based igniter compositions were prepared in different fuel-to-oxidizer ratios to study pyrotechnic performance and other characteristics. The prepared pyrotechnic systems have been characterized for surface morphology, ballistic properties (maximum pressure (Pmax), ignition delay and burning time to reach Pmax (BTPmax), burning rate, and exothermicity, as well as for impact and friction sensitivities. The composition having AlB12/KNO3 (25/75) displayed highest exothermicity (1790 cal/g) with lowest ignition delay (25 ms) and BTPmax (32 ms). The same composition exhibited highest impact sensitivity (height of 50% explosion: 53 cm), though within permissible limits. The experimental results indicate increased burning rate with the increase of AlB12 content. All the compositions were found to be insensitive to friction up to a load of 36 kg and thus are safe for processing and handling. Results indicate that the AlB12-based composition can be used for future igniter compositions.
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