Journal of Energetic Materials
Iranian Scientific Association of Energetic Materials
Sat, Jun 14, 2025
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Volume 19, Issue 3 (12-2024)
مواد پرانرژی 2024, 19(3): 157-166 |
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ebrahimi S. سنتز و مشخصهیابی ترکیب ⍺-تری فسفرو پنتا نیترید (⍺-P3N5). مواد پرانرژی 2024; 19 (3) :157-166
URL: http://isaem.ir/article-1-1495-en.html
URL: http://isaem.ir/article-1-1495-en.html
Abstract: (289 Views)
Triphosphorus pentanitride (P3N5) has been proposed as a safe and substitute alternative for red phosphorus in pyrotechnic obscurants formulations due to its high burning speed, lack of hydrolysis with air humidity, and high resistance to friction. In this research, alpha-triphosphorus pentanitride(α-P3N5) was synthesized by the reaction between phosphorus pentasulfide and ammonia. In the first stage of synthesis, the reaction of phosphorus pentasulfide with ammonia gas was carried out at a temperature of -10 to 90 ºC to produce the intermediate P2S5.(NH3)n. The IR spectrum of the intermediate P2S5.(NH3)n confirmed the presence of NH3 attached to the structure of P2S5.
In the second stage of synthesis; P3N5 compound was prepared by heating the intermediate P2S5.(NH3)n under different conditions up to 800 ˚C and in the flow of ammonia gas. The IR spectra of the P3N5 products under different operating conditions were completely identical, with only changes in the peak in the above of 3000 cm-1, caused by the presence of N-H or O-H impurities in the P3N5 product. The highest fraction of ammonolysis in this step was 0.62. In the last step; The P3N5 sample with the highest ammonolysis efficiency was crystallized in the presence of nitrogen gas at a temperature of 850 °C for 4 hours. In the Raman spectrum of the crystallized sample, the peak at 449 cm-1 related to the stretching vibrations of the P-P bond and in the EDS analysis, the main composition of phosphorus and nitrogen elements were identified. The results of CHN analysis also identified 35% nitrogen and very small amounts of hydrogen and sulfur. The results of IR spectrum and SEM analysis of crystalline P3N5 compound were similar to the results reported for ⍺-P3N5.
In the second stage of synthesis; P3N5 compound was prepared by heating the intermediate P2S5.(NH3)n under different conditions up to 800 ˚C and in the flow of ammonia gas. The IR spectra of the P3N5 products under different operating conditions were completely identical, with only changes in the peak in the above of 3000 cm-1, caused by the presence of N-H or O-H impurities in the P3N5 product. The highest fraction of ammonolysis in this step was 0.62. In the last step; The P3N5 sample with the highest ammonolysis efficiency was crystallized in the presence of nitrogen gas at a temperature of 850 °C for 4 hours. In the Raman spectrum of the crystallized sample, the peak at 449 cm-1 related to the stretching vibrations of the P-P bond and in the EDS analysis, the main composition of phosphorus and nitrogen elements were identified. The results of CHN analysis also identified 35% nitrogen and very small amounts of hydrogen and sulfur. The results of IR spectrum and SEM analysis of crystalline P3N5 compound were similar to the results reported for ⍺-P3N5.
Keywords: ⍺-Phosphorus Pentanitride, Synthesis, Characterization, Ammonolysis, Phosphorus pentasulfide
Type of Study: Research |
Subject:
سنتز، آناليز، کنترل کيفيت، فرمولاسيون و فرايندهاي توليد مواد پرانرژی (منفجره، پيروتکنيک و پيشرانه)
Published: 2025/03/9
Published: 2025/03/9
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