Thermal Stability of Mg/TeO2 Priming Compositions
Keywords:Mg/TeO2 priming composition, thermal environment, thermal stability, function time, firing sensitivity
The insensitive ignitors with magnesium/tellurium dioxide (Mg/TeO2) priming composition installed on the spacecraft will experience a harsh thermal environment. Therefore, it is necessary to verify their availability at extreme temperatures. Differential Scanning Calorimetry and Thermogravimetric Analysis (DSC-TGA) were used to analyze the reaction process of the Mg/TeO2 priming composition. The morphology change of the Mg/TeO2 priming composition after -70 ℃6d, room temperature, 165 ℃6d were analyze by digital cameras, scanning electron microscope (SEM), as well as the output pressure, ignition time, function time and firing sensitivity of the Mg/TeO2 priming composition under three temperature conditions were tested. The results show that in a temperature range of -70 ℃ ~ 165 ℃, the temperature conditions have an effect on the output pressure less than 5%, the influence of high temperature conditions on ignition/ function time and sensitivity is greater than low temperature. It can be used as a priming composition for insensitive ignitors at
-70 ℃ ~ 165 ℃.
The copyrights for articles in this journal are retained by the author(s), with first publication rights granted to the journal. By virtue of their appearance in this open-access journal, articles are free to use with proper attribution in educational and other non-commercial settings.