Method for testing granularity of 12-14 mu m ammonium perchlorate

A technology of ammonium perchlorate and particle size, which is applied in particle size analysis, measuring devices, particle and sedimentation analysis, etc., can solve the problems of large differences in test results and poor parallelism of test results, and achieve reduced test costs, simple test methods, The effect of improving accuracy and reproducibility

Inactive Publication Date: 2014-05-14
XIAN AEROSPACE CHEM PROPULTION PLANT
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Problems solved by technology

[0006] In order to overcome the poor parallelism of test results in the prior art, the same batch of samples needs multiple sampling tests, and the shortcomings of large differences in test results, the present invention proposes a method for testing the particle size of 12-14 μm ammonium perchlorate

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  • Method for testing granularity of 12-14 mu m ammonium perchlorate
  • Method for testing granularity of 12-14 mu m ammonium perchlorate
  • Method for testing granularity of 12-14 mu m ammonium perchlorate

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Embodiment Construction

[0035] This embodiment is a method for testing the particle size of ammonium perchlorate with a Malvern MS2000 laser particle size tester, and the particle size of the tested ammonium perchlorate is 12-14 μm. The specific process is:

[0036] Step 1, set the parameters of the laser particle size tester. The set parameters of the laser particle size tester include the refractive index of the sample and the refractive index of the dispersion medium. The refractive index of the sample is 1.482, and the refractive index of the dispersion medium is 1.391.

[0037] Step 2, preparing the dispersion. The dispersion consists of butyl acetate and lecithin. During preparation, 1.25 g of lecithin was added to 500 ml of butyl acetate and mixed uniformly to obtain a dispersion.

[0038] Step 3, sample processing. Multiple 4 g ammonium perchlorate samples were taken. Add the prepared dispersion liquid to each of the ammonium perchlorate samples. The amount of the dispersion liquid in ...

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Abstract

The invention relates to a method for testing granularity of 12-14 mu m ammonium perchlorate. The method comprises the following steps: respectively adding 2-5ml of dispersion liquids consisting of butyl acetate and lecithin in ammonium perchlorate samples, thus respectively obtaining pasty ammonium perchlorate samples, wherein the adding amounts of the dispersion liquids are different; and testing each ammonium perchlorate sample for 3-5 times, and respectively obtaining test data of the rest ammonium perchlorate samples. According to the method disclosed by the invention, under fixed dispersion time, complete dispersion of the samples under ultrasonication is guaranteed, the uniformity in sample treatment is realized, the method is simple and easy to learn, the artificial errors are reduced, the accuracy and reproducibility of test results are greatly improved, the range of multiple test results for the same sample is reduced to below 0.5 mu m for 2 mu m, and meanwhile, the method can be suitable for properly guiding production.

Description

technical field [0001] The invention relates to the measurement and characterization of the granularity of powder particles, in particular to a testing method for monitoring the pulverization of 12-14 μm ammonium perchlorate and the particle size index by a laser diffraction method. Background technique [0002] The total amount of ammonium perchlorate accounts for about 70% of the solid propellant. Ammonium perchlorate, as an important component in the solid propellant, directly affects the combustion performance of the propellant. The smaller the particle size of the ammonium perchlorate, the higher the burning rate of the propellant. The solid propellant charge is often mixed with ammonium perchlorate of different specifications, so that the performance of the propellant can be optimized. Different models have different formulations. Compared with the requirements, ammonium perchlorate of 12-14 μm accounts for 2.5%-40%. Ammonium perchlorate needs to be tested during prod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
Inventor 杨树燕宜建军张凯冯香毅刘青张岩刘新军肖兵刘敏
Owner XIAN AEROSPACE CHEM PROPULTION PLANT
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