Related Experiment Video
Updated: Jul 25, 2026
07:03
Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
Published on: November 15, 2016
Safer Pyrotechnic Obscurants Based on Phosphorus(V) Nitride
Ernst-Christian Koch1, Stanisław Cudziło2
1Lutradyn-Energetic Materials Science & Technology, Burgherrenstrasse 132, 67661, Kaiserslautern, Deutschland.
Angewandte Chemie (International Ed. in English)
|November 19, 2016
Summary
Phosphorus(V) nitride (P3N5) is a safer, more stable alternative to red phosphorus (PR) in pyrotechnic obscurants. P3N5 formulations offer superior performance and stability, making them ideal for insensitive munitions.
Area of Science:
- Materials Science
- Chemistry
- Defense Technology
Background:
- Red phosphorus (PR) is a key component in pyrotechnic obscurants but suffers from stability and safety issues.
- Degradation of PR in moist air produces hazardous phosphoric acids and phosphine (PH3).
Purpose of the Study:
- To investigate phosphorus(V) nitride (P3N5) as a potential replacement for PR in pyrotechnic obscurants.
- To evaluate the safety, stability, and performance characteristics of P3N5-based formulations.
Main Methods:
- Theoretical and experimental investigation of P3N5 properties.
- Formulation of pyrotechnic mixtures using P3N5 with oxidizers like KNO3, KClO3, and KClO4.
- Assessment of sensitivity to friction and impact.
- Burn rate and smoke generation analysis.
Main Results:
- P3N5 can be safely mixed with common oxidizers, exhibiting low sensitivity to friction and mild impact sensitivity.
- P3N5/KNO3 formulations burn significantly faster (up to 200 times) than PR-based mixtures, producing dense smoke.
- P3N5 demonstrates excellent stability in moist air, unlike PR, without generating hazardous byproducts.
Conclusions:
- P3N5 is a safe, stable, and high-performance replacement for PR in pyrotechnic obscurants.
- P3N5-based obscurants offer a superior figure of merit compared to current PR-based technologies.
- The findings support the use of P3N5 in the development of insensitive munitions.
Related Concept Videos
01:19Gas Chromatography: Types of Detectors-II
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
01:14Photoluminescence: Applications
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
01:25Fluorescence and Phosphorescence: Instrumentation
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
01:02Flame Photometry: Overview
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...