Thermal Stability of Mg/TeO2 Priming Compositions

Authors

  • Xiang-run ZHAO Beijing Institute of Technology
  • Nan YAN Beijing Institute of Technology
  • Wu-si DAI Institute of Pyrotechnics Technology
  • Yao-kun YE China Academy of Space Technology
  • Shi-xin JIN Liaoning North Huafeng Special Chemistry Co. Ltd.
  • Jin-hong HUANG Liaoning North Huafeng Special Chemistry Co. Ltd.

DOI:

https://doi.org/10.5755/j02.ms.22817

Keywords:

Mg/TeO2 priming composition, thermal environment, thermal stability, function time, firing sensitivity

Abstract

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 ℃.

Author Biographies

Xiang-run ZHAO, Beijing Institute of Technology

State Key Laboratory of Explosion Science and Technology

Nan YAN, Beijing Institute of Technology

State Key Laboratory of Explosion Science and Technology

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Published

2021-02-19

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Section

Articles