Mechanism of Chemically Induced Structural Evolution of Lead Azide under Hygrothermal Condition
Aging behavior of pyrotechnic agents is a serious threat to the reliability of the practical application of pyrotechnic products, while multiple environmental factors make it challenging to characterize the aging mechanism of pyrotechnic agents. This paper explored the aging process of LA in four hygrothermal environments with morphology and structure analysis techniques. LA aging underwent three stages: rapid surface reaction with H<sub>2</sub>O and CO<sub>2</sub>, interior hydrolysis by H<sub>2</sub>O, and CO<sub>2</sub> reaction with lead oxides. The cavity structures formed during LA's structural evolution reduced its energy density, causing increased energy dissipation under mechanical stimuli and preventing ignition. Further, reactions formed by inert lead compounds resisted electrostatic ignition, leading to agent failure. This comprehensive study provided a solid foundation for understanding the aging behavior of LA in multistress environments, offering valuable insights into its safe storage and handling.
Authors
- Ji‐Min Han (ORCID: https://orcid.org/0000-0001-9704-6846)
- Qian‐You Wang (ORCID: https://orcid.org/0000-0002-8892-7825)
- Yuewen Lu (ORCID: https://orcid.org/0000-0003-0147-0613)
- Wen‐Chao Tong
- Qian Yu (ORCID: https://orcid.org/0000-0002-1436-6025)
- Li Yang (ORCID: https://orcid.org/0000-0001-9298-2029)
- Chuan Hu (ORCID: https://orcid.org/0000-0002-6373-8067)
- Dongxu Zhang (ORCID: https://orcid.org/0000-0003-4911-9339)
Institutions
- Beijing Institute of Technology (CN)
- Applied Physical Sciences (United States) (US)
Publication Details
- Journal
- Langmuir
- Published
- 2025-03-05
- DOI
- https://doi.org/10.1021/acs.langmuir.4c05367
- Primary Topic
- Machine Learning in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China