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Identification method of eutectic structure of explosive

An identification method and crystal structure technology, applied in Raman scattering, material excitation analysis, etc., can solve the problems of weak vibration frequency of Raman spectrum and difficult distinction of Raman peaks, etc., and achieve the effect of simple operation and simple principle

Active Publication Date: 2016-02-03
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the vibration frequency of the Raman spectrum is weak, and the Raman peaks are not easy to distinguish

Method used

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  • Identification method of eutectic structure of explosive
  • Identification method of eutectic structure of explosive
  • Identification method of eutectic structure of explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] First, take the pure sample of ε-crystal form CL-20 and the pure sample of BTF and mix them in equal proportions. And the eutectic sample was prepared by using the eutectic explosive preparation method reported in the literature. Weigh 3-5 mg of CL-20 pure sample and BTF pure sample respectively and stick them on the stage of Fourier Raman spectrometer, keep the surface of the sample flat, and conduct Raman test directly to obtain the Raman 2000-200cm of explosives CL-20 and BTF -1 Spectrum, and the mixed sample was subjected to Raman characterization in turn. From the Raman spectrum of the mixed sample, it can be seen that there are two characteristic Raman peaks of explosives, and the peak position does not move or split. Through analysis, it can be seen that the two There is no interaction between them.

[0037] According to the density functional theory (DFT), the structure optimization and vibration form simulation of the simple explosive CL-20 etc. were carried o...

Embodiment 2

[0047] First, take the pure sample of explosive TNT and the pure sample of ε-crystal form CL-20 and mix them in equal proportions. The total amount of each part is 0.2g, and two sets of samples are made. uniform. Weigh 3-5 mg of pure sample and stick it on the stage of Fourier Raman spectrometer, keep the surface of the sample flat, and directly conduct Raman test to obtain the Raman 2000-200cm of explosives CL-20 and TNT -1 Spectrum, and the mixed sample was subjected to Raman characterization in turn. The mixed sample can be seen to have two characteristic Raman peaks of explosives, and the peak position does not move or split. Through analysis, it can be seen that there is no interaction between the two .

[0048] According to the density functional theory (DFT), the structural optimization and vibration form simulation of the simple explosive TNT etc. are carried out, and the molecular configuration is constructed through GaussView5.0 as follows Figure 5 shown by Figu...

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Abstract

The invention discloses an identification method of a eutectic structure of explosive. The identification method comprises the following steps: firstly determining Raman spectra of a eutectic explosive sample and single-substance explosive samples to obtain corresponding fingerprint spectrum characteristic peaks; adopting a B3LYP mixing functional method, and calculating vibration frequencies of explosive molecules respectively by using a DFT (Density Functional Theory); then identifying the fingerprint spectrum characteristic peaks of the explosive molecules and attributing a vibration mode; and finally, comparing the Raman spectra of the eutectic explosive sample and the two single-substance explosive samples, attributing the vibration mode of the eutectic explosive sample according to vibration peak displacement of the fingerprint spectrum characteristic peaks of the two single-substance explosive samples, and analyzing the forming reasons of the eutectic structure through Raman characteristic displacement. According to the identification method, the eutectic structure of the explosive is rapidly analyzed and identified by simply mixing the single-substance explosive and the single-substance explosive mixed two by two, and taking the single-substance explosive to react two by two to form the inconsistent eutectic Raman spectra and generate different Raman peak position changes.

Description

technical field [0001] Embodiments of the present invention relate to the field of energetic materials, and more specifically, embodiments of the present invention relate to a method for identifying the eutectic structure of explosives. Background technique [0002] In the field of energetic materials, researchers have been working on developing explosives with high energy, low sensitivity and low cost. At present, there are two main approaches to the development of high-energy insensitive explosives: the development of new single-substance explosives, and the modification of existing explosive formulations. Since it is difficult to make breakthroughs in the research and development of new single-substance explosives in a short period of time, and the process of modifying explosive formulations will also involve problems such as uneven mixing and different thermal expansion coefficients, these two methods have many problems in actual research. ,Slow progress. Therefore, st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 何璇王慧杨宗伟李洪珍陈东罗毅威王蔺
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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