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Pyrotechnic Delay Compositions Based on BaO2: Not as "Green" as Expected.
Kinga Lysien1, Klaudia Szatan2, Konrad Szydlo3
1Department of Physical Chemistry and Technology of Polymers, Silesian University of Technology, 44-100 Gliwice, Poland.
Molecules (Basel, Switzerland)
|August 26, 2023
Summary
Barium peroxide shows promise as an eco-friendly oxidizer in pyrotechnic delay compositions (PDCs). Metallic fuel choice significantly impacts PDC properties and combustion behavior.
Area of Science:
- Materials Science
- Chemical Engineering
- Combustion Science
Background:
- Pyrotechnic delay compositions (PDCs) are crucial for controlled timing in various applications.
- Developing environmentally friendly oxidizers is a key challenge in pyrotechnics.
- Barium peroxide (BaO2) offers a potential alternative to traditional oxidizers.
Purpose of the Study:
- To explore barium peroxide as an eco-friendly oxidizer for PDCs.
- To analyze the combustion products of novel PDCs.
- To understand how different metallic fuels (Mg, Al, Fe, Cu) influence PDC performance.
Main Methods:
- Synthesis and characterization of PDCs incorporating barium peroxide.
- Assessment of friction and impact sensitivity.
- Measurement of linear combustion velocity as a function of oxygen balance (OB).
- Analysis of combustion residues using Raman spectroscopy and Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS).
Main Results:
- The developed PDCs demonstrated acceptable safety characteristics (friction and impact sensitivity).
- Linear combustion velocity was successfully correlated with oxygen balance.
- The composition of combustion products was determined, providing insights into the reaction pathways.
- The influence of metallic fuel type on PDC properties was elucidated.
Conclusions:
- Barium peroxide is a viable environmentally friendly oxidizer for PDCs.
- The choice of metallic fuel significantly affects the combustion properties of PDCs.
- A preliminary combustion mechanism for these PDCs was proposed based on experimental evidence.
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