Identification method of eutectic structure of explosive

A crystal structure and explosive technology, applied in Raman scattering, material excitation analysis, etc., can solve problems such as uneven mixing, slow progress, and different thermal expansion coefficients, and achieve simple operation, simple principle, and easy-to-obtain equipment and instruments Effect

Inactive Publication Date: 2018-01-16
徐文敏
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  • Application Information

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Problems solved by technology

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

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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

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Embodiment 1

[0018] Firstly, the pure sample of CL-20 in e-crystal form and the pure sample of BTF were mixed in equal proportions, the total amount of each part was 0.2 g, and they were ground and mixed with a mortar to make them evenly mixed. And the eutectic sample was prepared by using the eutectic explosive preparation method reported in the literature. Weigh 3-5mg 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 samples flat, and directly conduct Raman test 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 there is no movement or splitting of the peak position. Through analysis, it can be seen that the two There is no interaction between them.

Embodiment 2

[0020] First, take the pure sample of explosive TNT and the pure sample of e-crystal 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 samples and stick them on the stage of Fourier Raman spectrometer, keep the surface of the samples flat, conduct Raman test directly, obtain the Raman 2000-200cm 1 spectra of explosives CL-20 and TNT, and mix The samples were subjected to Raman characterization in turn. The mixed samples can be seen to have the characteristic Raman peaks of the two explosives respectively, and there is no movement or splitting of the peak positions. Through analysis, it can be seen that there is no interaction between the two.

[0021] In the above examples, the Raman spectra of the simple explosives CL-20, TNT, and BTF were measured, and the vibration frequencies of the molecules were theoretically calculated. Combined with the Raman spectra obtained from experiments,...

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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 system for identifying eutectic structures 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, start...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 徐文敏
Owner 徐文敏
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