Method for testing continuous distribution of crystal density based on density gradient light transmittance method

Abstract

The invention discloses a method for quickly measuring the continuous distribution of crystal density of an energetic material. Crystal samples are naturally settled down and stabilized at different positions of a density gradient tube according to a density difference by using the density gradient tube, and the liquid densities of the crystal samples at different heights are calibrated and corrected through standard density floaters; then a light source generator and a light source detector which are mounted on two sides of the density gradient tube perform synchronous up-and-down scanning and data acquisition; a relation curve between the light transmittance and the height is calculated according to the light intensity differences of different heights and different regions, so that a continuous density distribution curve of the crystal samples is accurately calculated. Therefore, the density distribution situations of different crystal samples are judged. The method disclosed by the invention is used for quickly measuring the continuous distribution of the crystal density of the similar energetic materials, and the quantity of the samples under all density gradients is quantitatively expressed; the quantitative test on the density distribution of crystal particles is realized.

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 testing the continuous distribution of crystal density based on the density gradient transmittance method Background technique [0002] Density is an important physical property index of solid granular materials, and its value depends on the material composition and internal structure of the material, which can directly affect the performance of the material. For energetic materials, the crystal particle density not only affects the detonation energy of explosives and propellants, but also is closely related to their safety performance. The research of high-performance weapons and ammunition puts forward an urgent need for high-precision measurement of the density and density distribution of crystal particles of energetic materials. [0003] Crystal particle density is a statistically signi...

AI Technical Summary

Problems solved by technology

The liquid specific gravity method and the gas density method can only obtain the average density of the sample. This method has low accuracy and cannot describe the density distribution of the particles; the sedimentation flotation method is to repeat the sedimentation flotation and washing of the sample to be tested in liquids of different densities. Filtration, drying, constant weight, and finally the mass distribution of samples at different densities is obtained. This method can describe the density distribution of samples to a certain extent, but the test process is cumbersome, time-consuming, labor-intensive, and has many sources of error. It is difficult to draw an accurate line. , a complete and continuous density distribution curve; the density gradient method is a new method that can quickly and accurately determine the crystal density of explosives, but the tester can only observe the distribution of the sample in the density gradient column visually, and it is difficult to quantitatively characterize the crystal density of explosives. Quantity of samples, unable to quickly perform quantitative testing of particle density distribution

Therefore, no real quantitative test method for particle density distribution has been established at home and abroad, and the continuous distribution curve of particle density cannot be drawn as accurately as the particle size test.

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