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Micro-raman spectrum testing method for crystal quality evaluation of single-compound explosive

A technology for elemental explosives and quality evaluation, applied in the field of testing, can solve the problems of complex operation and inability to quantitatively evaluate crystal quality.

Active Publication Date: 2012-12-19
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its operation is more complicated, and it is impossible to quantitatively evaluate the crystallization quality

Method used

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  • Micro-raman spectrum testing method for crystal quality evaluation of single-compound explosive
  • Micro-raman spectrum testing method for crystal quality evaluation of single-compound explosive
  • Micro-raman spectrum testing method for crystal quality evaluation of single-compound explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Micro-Raman Spectroscopy Test for Octogold (HMX) Crystal Quality Evaluation

[0036] 1) Take samples:

[0037] Two samples of high-quality and low-quality octogold (HMX) determined in the photographic method were selected. For each sample, 6 HMX elemental explosive particles were randomly selected, placed on the glass slide of the Raman spectrometer, and focused with a 50 times telephoto objective lens.

[0038] 2) Test the Raman spectrum of the HMX sample to select the characteristic Raman peak:

[0039] When the wavelength of the excitation light is 785nm (the full-scale laser power of the laser is 20mw), the exposure time is 10s, the number of scans is 2 times, and the laser power is 10%, (400-2000) cm -1 Scan the range to obtain the Raman spectrum of HMX ( image 3 ), 951cm -1 The intensity of the spectral peak is relatively high, and there is no interference with other spectral peaks, so choose 951cm -1 The peaks are characteristic Raman peaks.

[...

Embodiment 2

[0049] Example 2: Micro-Raman Spectroscopy Test of RDX Crystal Quality Evaluation

[0050] 1) Take samples:

[0051] Two high-quality and low-quality RDX samples determined in the photographic method were selected. For each sample, 6 RDX elemental explosive particles were randomly selected, placed on the sample stage of the Raman spectrometer, and focused with a 50 times telephoto objective lens.

[0052] 2) Test the Raman spectrum of the RDX sample to select the characteristic peaks:

[0053] When the wavelength of the excitation light is 785nm (the full-scale laser power of the laser is 20mw), the exposure time is 10s, the number of scans is 2 times, and the laser power is 10%, (400-2000) cm -1 Scan the range to obtain the Raman spectrum of RDX ( Image 6 ), 883cm-1 The intensity of the spectral peak is relatively high, and there is no interference with other spectral peaks, so choose 883cm -1 The peaks are characteristic Raman peaks.

[0054] 3) Select the laser power ...

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Abstract

The invention relates to a micro-raman spectrum testing method for crystal quality evaluation of a single-compound explosive. The method comprises the following steps of: randomly selecting 6-12 single-compound explosive particles and placing on a slide of a laser confocal raman spectrometer; focusing by using a long-focus objective of 50 multiples, performing full-spectrum scanning on the single-compound explosive particles with laser wavelengths within wavelength ranges of 785 nm and 2,000-400 cm<-1> to obtain a raman spectrum of the single-compound explosive particles and selecting peak with high raman strength and without interference between spectral peaks as a characteristic spectral peak; and performing static scanning on the characteristic raman peak within a laser attenuation range of 1-100 percent in order to prevent possible damage caused to a crystal microstructure of a test piece by a laser thermal effect, performing static scanning on the characteristic spectral peak while determining that peak width at half height of the characteristic spectral peak is not widened, randomly testing 2-3 micro area points for each particle, and evaluating the crystallization quality of the crystal through level of the peak width at half height of the characteristic spectral peak relative to standard deviation.

Description

technical field [0001] The invention relates to a test method, in particular to a micro-Raman spectrum test method for quality evaluation of single explosive crystals. Background technique [0002] The crystallization quality of elemental explosive crystals refers to the level of micro-nano-scale defects related to the crystallization quality, such as micropores, microcracks, crystal dislocations, twins, etc. inside the elemental explosive particles. These defects may produce "hot spots" under the dynamic conditions of the weapon and reduce its safety. Therefore, the crystallization quality of the elemental explosive crystal is related to the safety of the charge. [0003] At present, the methods for evaluating the crystallization quality of elemental explosive crystals at home and abroad include density method and photographic method. in: [0004] Density method evaluates crystal quality by sample density, the more crystal micro-defects, the lower the density. It is nece...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 栾洁玉陈智群张皋邵颖慧徐敏李晓宇王民昌周文静宁艳利王克勇潘清王明高朗华苏鹏飞胡银李文杰张丽涵
Owner XIAN MODERN CHEM RES INST