Fast analysis method of ammonium perchlorate particle size in solid propellant

A solid propellant and ammonium perchlorate technology, applied in particle size analysis, particle and sedimentation analysis, measuring devices, etc., can solve the problems of incomplete monitoring of the production process, problems that cannot be found in time, cumbersome operation steps, etc., and achieve easy operation , easy to operate, guaranteed quality effect

Inactive Publication Date: 2007-01-31
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of rapid analysis method of ammonium perchlorate particle size in the solid propellant, this method can solve adopting sieving method and microscope micro-measurement method to measure ammonium perchlorate particle size, there is loaded down with trivial details operation steps, and measurement needs a large number of samples , the experimental data provided often lag behind the production process, resulting in incomplete monitoring of the production process and problems that cannot be found in time

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  • Fast analysis method of ammonium perchlorate particle size in solid propellant
  • Fast analysis method of ammonium perchlorate particle size in solid propellant
  • Fast analysis method of ammonium perchlorate particle size in solid propellant

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specific Embodiment approach 1

[0008] Specific implementation mode one: combine figure 1 Illustrate this embodiment, the rapid analysis method of ammonium perchlorate particle size in the solid propellant of this embodiment is completed by the following steps: adopt traditional sieving method to collect the ammonium perchlorate sample that purity is more than 99.5%, set up sample storehouse 001; Using a Fourier transform near-infrared spectrometer at a wavelength of 12000cm -1 ~4000cm -1 Collect sample spectra within a certain range and establish sample spectral library 002; select representative samples 003 by mathematical methods; -1 ~4000cm -1 Extract and optimize the information of the spectrum within the range, using the amino group at a wavelength of 6463cm -1 The first-order double frequency absorption peak and wavelength is 4680cm -1 Establish the standard sample model 004 based on the combined frequency absorption peak information; compare the particle size value predicted by the standard sampl...

specific Embodiment approach 2

[0013] Specific embodiment two: in the 001 step of present embodiment, adopt traditional sieving method to collect the needle-shaped ammonium perchlorate sample that purity is 99.5%, and the used sieve mesh number is 40 orders~130 orders, is divided into different grades, with The mesh number of the sieve is calibrated on the sieve; in the 002 step, the MPA Fourier transform near-infrared spectrometer using the diffuse reflection of the integrating sphere has a resolution of 8cm -1 , The number of scans is 64, and the diameter of the sample rotator is 50mm. Other steps are the same as in the first embodiment.

[0014] In this embodiment, the correlation coefficient between the particle size value predicted by the standard sample model and the sample particle size value obtained by the traditional sieving method is R=0.9988, the slope of the straight line is 0.9915, the intercept is 0.716, and the coefficient of determination of the model is 99.38 (see attached figure 2 ). ...

specific Embodiment approach 3

[0015] Specific embodiment three: present embodiment adopts traditional sieving method to collect the spherical ammonium perchlorate sample that purity is 99.8% in step 001, and the used sieve mesh number is 50 orders~160 orders, is divided into different grades, with sieve The mesh number of the mesh is used to calibrate the oversize. Other steps are the same as in the first embodiment.

[0016] In this embodiment, the correlation coefficient between the particle size value predicted by the standard sample model and the sample particle size value obtained by the traditional sieving method is R=0.999, the slope of the straight line is 0.999, the intercept is 0.482, and the coefficient of determination of the model is 99.04 (see attached image 3 ).

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Abstract

The invention relates to a rapid analysis method for granularity of ammonium perchlorate in solid propellant. It includes the following steps: collecting ammonium perchlorate sample of purity over 99.5% by screen method; gathering sample spectrum and building database; selecting representative sample by math method and taking preprocess, building standard sample model by using the wave length information of amino between first level double frequency absorption peak of 6463cm-1 and combining frequency absorption peak of 4680cm-1; comparing the granularity of pre-testing to that of sample to judge whether it is qualified; if it is not qualified, judging whether it is out-drop point; if it is out-drop point, taking second judgment; if not, returning to the first step. The invention is easy to operate and has rapid analyzing speed.

Description

technical field [0001] The invention relates to a method for analyzing the particle size of ammonium perchlorate. Background technique [0002] At present, the particle size measurement of solid propellants mainly adopts sieving classification measurement method and microscope micro-measurement method. No matter which method is used, the operation steps are relatively cumbersome, the measurement requires a large number of samples, and the experimental data provided often lag behind the production process. , resulting in incomplete monitoring of the production process and failure to detect problems in time. Therefore, it is imperative to improve the rapid detection of mass in solid propellants. [0003] In the preparation of solid propellant, the preparation of oxidant is the most complicated, and ammonium perchlorate is mostly used as oxidant, and the particle size and distribution must be strictly controlled through screening, because the particle size of ammonium perchlor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02G01N21/31
Inventor 黄玉东姜波刘丽
Owner HARBIN INST OF TECH
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