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Method for testing particle size and particle size distribution of aluminum trihydride

A technology of aluminum hydride and particle size distribution, applied in particle size analysis, particle and sedimentation analysis, measuring devices, etc., can solve the problems of testing energetic materials safety hazards and other problems, and achieve the effect of good precision

Inactive Publication Date: 2019-05-14
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry method is simpler and more efficient than the wet method, but there are safety hazards in testing energetic materials

Method used

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  • Method for testing particle size and particle size distribution of aluminum trihydride
  • Method for testing particle size and particle size distribution of aluminum trihydride
  • Method for testing particle size and particle size distribution of aluminum trihydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A batch of AlH 3 The particle size and particle size distribution of the sample are tested as follows: turn on the wet laser particle size analyzer, preheat for half an hour, run the particle size testing software that comes with the wet laser particle size analyzer, and clean the instrument pipeline with butyl acetate. Adjust instrument centering and test instrument background in the software window. Weigh about 1.0g of AlH 3 Put the sample in a 100mL beaker, add about 30mL of 2.5% lecithin-butyl acetate solution, and disperse it by ultrasonic (about 50Hz) for 5 minutes. The refractive index of the instrument is about 5% to 10%. Set the test parameters in the software and test the samples. After the test is completed, the computer will automatically give the test results. Particle size test results are expressed as median particle size d 50 (μm) and volume average particle size d 4,3 (μm) said. Particle size distribution diagram as figure 1 As shown, the particle...

Embodiment 2

[0027] A batch of AlH 3 Samples, their particle size and particle size distribution are tested as follows: turn on the wet laser particle size analyzer and preheat for half an hour. Run the particle size test software and clean the instrument tubing with butyl acetate. Adjust instrument centering and test instrument background in the software window. Weigh about 1.0g of AlH 3 Put the sample in a 100mL beaker, add about 30mL of 2.5% wetting agent P-40 (nonylphenol polyoxyethylene ether)-butyl acetate solution, ultrasonically disperse for 5min, after the background test of the instrument is completed, add the sample solution to the In the sample pool, until the refractive index is about 5% to 10%, set the test parameters in the software and test the samples. After the test is completed, the computer will automatically give the test results. Particle size test results are expressed as median particle size d 50 (μm) and volume average particle size d 4,3 (μm) said. Particle ...

Embodiment 3

[0029] A batch of AlH 3 Samples, their particle size and particle size distribution are tested as follows: turn on the wet laser particle size analyzer and preheat for half an hour. Run the particle size test software and clean the instrument tubing with butyl acetate. Adjust instrument centering and test instrument background in the software window. Weigh about 1.0g of AlH 3 Place the sample in a 100mL beaker, add about 30mL of 2.5% lecithin-butyl acetate solution, and disperse it ultrasonically for 10 minutes. After the background test of the instrument is completed, add the sample solution into the sample cell until the refractive index is 5% to 10%. Left and right, set the test parameters in the software, test the samples, and the computer will automatically give the test results after the test is completed. Particle size test results are expressed as median particle size d 50 (μm) and volume average particle size d 4,3 (μm) said. Particle size distribution diagram a...

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Abstract

The invention provides a method for testing the particle size and particle size distribution of aluminum trihydride. The method applies a wet laser diffraction method to test the particle size and particle size distribution of AlH3. The method comprises the steps that (1) a dispersion medium is added into the aluminum trihydride, and the dispersion medium is a lecithin-butyl acetate solution withthe mass fraction being (1-3)% or a nonylphenol polyoxyethylene ether-butyl acetate solution with the mass fraction being (1-3)%; (2) combined ingredients in the step (1) are dispersed, and thus a completely-dispersed AlH3 suspension system is prepared; and (3) the particle size and particle size distribution of the aluminum trihydride in a suspension treated in the step (2) are measured through awet laser particle analyzer. According to the method, the relative standard deviation of the multiple measuring results of the particle size is not greater than 5%, and the precision of the method isgood.

Description

technical field [0001] The invention relates to a method for testing the particle size and particle size distribution of aluminum trihydride. Background technique [0002] H 3 It is a new type of selective reducing agent, which can be used as hydrogen storage material, hydrogen source of fuel cell and polymerization catalyst. Since AlH 3 With high heat of combustion and specific impulse, it is widely studied in solid propellants as a new type of high-energy propellant fuel, and is used to improve the combustion performance and energy performance of solid propellants. H 3 The particle size and particle size distribution are closely related to its performance and are important indicators for product quality monitoring. H 3 As a new type of energetic material, there is no ready-made particle size test method available. At present, the most widely used particle size testing method is the laser diffraction method, which is divided into wet method and dry method. The wet me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
Inventor 韩丽萍徐胜良王敏刘发龙杨秋秋章园园李颖
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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