Abstract
In order to explore the pre-ignition reaction of aluminum/polytetrafluoroethylene (AI/PTFE) material. AI2O3/PTFE composites were prepared by ultrasonic mixing method. The crystal structure, microstructure and thermochemical properties were characterized and the thermochemical reaction characteristics and influencing factors were analyzed. The results show that AI2O3 can delay the initial temperature of PTFE melting. The smaller the particle size of AI2O3 and PTFE, the easier it is for the AI2O3/PTFE material to react and release more heat. AI2O3 with small particle size can delay the initial temperature of AIF3 formation reaction and advance the initial temperature of AIF3 crystal transformation reaction, thus increasing the concentrated heat release of the reaction. The reaction degree of AI2O3 (50nm) and PTFE (1 μm) is the highest. The thermochemical reaction properties of α-AI2O3/PTFE are better than those of γ-AI2O3/PTFE and amorphous AI2O3/PTFE. The thermochemical reaction of AI2O3/PTFE exhibits the typical kinetic characteristics. With the increase of the heating rate, the peak temperature of the main heat release peak of the reaction increases. The calculated apparent activation energy of AI2O3/PTFE reaction is 45.0kJ/mol.
| Translated title of the contribution | Thermochemical Reaction Characteristics and Influencing Factors of Alumina/Polytetrafluoroethylene Composites |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 35-43 |
| Number of pages | 9 |
| Journal | Huozhayao Xuebao/Chinese Journal of Explosives and Propellants |
| Volume | 47 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2024 |