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Establishment of a management method to improve the quality of observation based on an experiential learning cycle
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<教育学研究科高度教職実践専攻 学校課題解決研究報告書要旨>義務教育学校における持続可能な学校文化の構築に向けた実践モデルの提案～学校教職員の「揺らぎ・ずれ・ギャップ」の克服と「改善知」の継承～
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Cocrystallization Effect on the Detonation Performance of Fuel–Oxidizer Combination
Get PDFCocrystals contain two components in their crystalline structures. This article describes the detonation experiments on cocrystals and mixtures of fuel and oxidizers. Five pairs of fuels and oxidizers were selected as the target cocrystals: 1,2,4-triazole (TA)/sodium perchlorate (SP), 3-amino-1,2,4-triazole (3ATA)/SP, 4-amino-1,2,4-triazole (4ATA)/SP, glycine (Gly)/ ammonium nitrate (AN), and 4ATA/AN. All the cocrystals showed higher propagation velocities (Vp) than those of the corresponding mixtures. Especially, 3ATA/SP and 4ATA/SP cocrystals exhibited steady-state detonation with average detonation velocities of 4.62 and 4.76 km/s, respectively, whereas Vp of 3ATA+SP and 4ATA+SP mixtures gradually decreased. High-speed photography supported the results of the detonation experiments for the 3ATA/SP and 3ATA+SP. The measured average detonation velocities of 3ATA/SP and 4ATA/SP accounted for 89.3% and 84.6%, respectively, of the calculated detonation velocities of the respective mixtures, indicating that the detonation of the two cocrystals was nonideal. The results led to the construction of a hypothesis about hotspot growth in cocrystals and mixtures due to the difference in the manner of particle contact. These results suggest that cocrystallization can improve the detonation performance of the combination of fuel and oxidizers