文章信息/Info

Title:

Mechanism research for reducing sensitivity of nitramine explosive particles by nanocrystallization based on critical electronic excitation energy

作者:

劉杰; 戎園波; 靳承蘇; 郝嘎子; 肖磊; 柯香; 姜煒; 李鳳生

南京理工大學國家特種超細粉體工程技術研究中心，江蘇 南京

Author(s):

 Jie Liu;  Yuan-bo Rong;  Cheng-su Jin;  Ga-zi Hao;  Lei Xiao;  Xiang Ke;  Wei Jiang;  Feng-sheng Li

 National Special Superfine Powder Engineering Research Center of China, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu

關鍵詞:

硝胺炸藥; 顆粒大小; 臨界電子激發能; 納米化; 降感機理

DOI:

10.7502/j.issn.1674-3962.2017.06.04

文獻標志碼:

A

摘要:

采用場發射掃描電子顯微鏡（FESEM），實測記錄了硝胺炸藥顆粒在電子能作用下開始發生分解變形（在顆粒表面產生裂紋）時的狀態，結合Image Pro Plus圖形處理軟件，計算出了硝胺炸藥顆粒開始發生分解變形所需的臨界電子激發能。研究結果表明：當顆粒粒徑大于10μm時，隨著粒徑減小，硝胺炸藥顆粒臨界電子激發能減��；當顆粒粒徑小于約10μm后，臨界電子激發能隨粒徑減小而迅速增大；當顆粒粒徑減小至約0.5μm時，隨著粒徑進一步減小，臨界電子激發能變化不大。本研究以實測計算的臨界電子激發能為基礎，可從能量角度解釋硝胺炸藥納米化降感機理，對指導納米硝胺炸藥的實際應用具有重要意義。

Abstract:

The state, that the nitramine explosive particle is starting to decompose exhibiting cracks on its surface, is observed and recorded using the S-4800II Fielding Emission Scanning Electron Microscope (FESEM), the Image Pro Plus (IPP) System is employed to obtain the projected area of that decomposed particle in the FESEM image, and the critical electronic excitation energy (CEEE) of the nitramine explosive particle is calculated. Result has shown that: when the particle size is above 10μm, the CEEE value is decreased with the reduction of particle size; when the particle size is under about 10μm, the CEEE value is sharply increased with the reduction of particle size; when the particle size is about 0.5μm, the CEEE value is almost not increased with the reduction of particle size. Based on the CEEE, it is very helpful to explain the mechanism for reducing sensitivity of nitramine explosive particles by nanocrystallization, so as to provide a theoretical support for practical application of nano-sized nitramine explosives.