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Method and device for testing content of easily-volatile matters in explosive

A technology of volatile content and explosives, applied in the field of instrument analysis, can solve problems such as affecting the accuracy of experimental results, unable to completely remove volatile substances, etc., to achieve accurate thermal decomposition rate calculation and decomposition kinetic analysis results, accuracy guarantee, Simple to use effects

Active Publication Date: 2014-12-03
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, sample pretreatment and vacuum extraction cannot completely remove the adsorbed volatiles in explosives, and some residual traces of adsorbed volatiles will still be released during the Brinell pressure method and vacuum stability test, which will affect the experimental results the accuracy of

Method used

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  • Method and device for testing content of easily-volatile matters in explosive
  • Method and device for testing content of easily-volatile matters in explosive
  • Method and device for testing content of easily-volatile matters in explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 1g of HMX-based PBX explosives to the sample cell of the device for measuring the content of volatiles in explosives (hereinafter referred to as the improved microcalorimeter), vacuumize the sample cell, and set The initial temperature is 20°C, the waiting time is 5min, the constant temperature time is 30min, the temperature rise step is 1°C, the reaction judgment sensitivity is -0.005°C / min, and the reaction termination condition is that the heating rate is ≥0.05°C / min, start the device to heat, and the sample The cell is heated up to the initial temperature of 20°C and then waits for the temperature to balance. After the temperature is balanced, search for the temperature, heat flow, pressure and sample cell temperature rise rate at the same time, and compare the sample cell temperature rise rate with the reaction termination conditions and reaction judgment sensitivity. When the heating rate of the sample cell is less than 0.05°C / min, that is, the reaction termina...

Embodiment 2

[0048] Add 1g of TATB explosives into the sample cell of the improved micro-calorimeter, evacuate the sample cell, and set the initial temperature to 25°C, the waiting time to 15 minutes, and the constant temperature time to 15 minutes on the control system of the improved micro-calorimeter. , the temperature rise step is 5°C, the reaction judgment sensitivity is -0.02°C / min, and the reaction termination condition is that the temperature rise rate is ≥0.05°C / min, the heating device is started, and the heating and judgment process of the equipment is the same as that of Example 1, only the judgment data Use data from this example. When the temperature rise rate ≥ 0.05°C / min is detected, the instrument test enters the termination stage. In this embodiment, the improved microcalorimeter enters the termination stage when the temperature rise rate just exceeds 0.05°C / min.

[0049] During the heating process of the improved microcalorimeter, the pressure, temperature and heat flow c...

Embodiment 3

[0051] Add 2g of PETN explosives into the sample pool of the improved micro-calorimeter, evacuate the sample pool, and set the initial temperature to 21°C, the waiting time to 10min, and the constant temperature time to 25min on the control system of the improved micro-calorimeter , the temperature rise step is 0.2°C, the reaction judgment sensitivity is -0.02°C / min, and the reaction termination condition is that the temperature rise rate is ≥0.05°C / min. The process of heating and judgment of the equipment is the same as that of Example 1, and only the judgment data is used in this embodiment The data. When the temperature rise rate ≥ 0.05°C / min is detected, the instrument test enters the termination stage. In this embodiment, the improved microcalorimeter enters the termination stage when the temperature rise rate just exceeds 0.05°C / min.

[0052] During the heating process of the improved microcalorimeter, the pressure, temperature and heat flow changes in the sample cell ar...

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Abstract

The invention discloses a method for testing the content of easily-volatile matters in explosive, and provides a device improved based on a microcalorimeter correspondingly, wherein the device is formed by arranging a presser sensor used for measuring the real-time pressure in a sample cell on the sample cell of the microcalorimeter and arranging a reading device, a searching device and a comparing device on a control system of the microcalorimeter. In testing, the explosive is put into the sample cell firstly, and after vacuumization is carried out, the device provided by the invention is started, parameters including the start temperature, the temperature rise amplitude, the reaction judgment sensitivity, the constant temperature time, the waiting time, the reaction termination conditions and the like of the microcalorimeter are set, the pressure change and the temperature rise rate change in the sample cell are recorded, and then the content of the volatile matters is obtained by an ideal gas state equation. According to the invention, by analyzing the relationship between the gas discharge quantity and the heat flux change, the content of the easily-volatile matters in the explosive can be effectively tested.

Description

technical field [0001] Embodiments of the present invention relate to the field of instrumental analysis, and more specifically, embodiments of the present invention relate to a method for determining the adsorption amount of volatiles in explosives. Background technique [0002] Explosives are in a metastable state at room temperature. As the ambient temperature rises, they will decompose at a certain rate, releasing gas products with relatively low molecular weight, and the mass will decrease accordingly, accompanied by heat changes. Using these changes in properties, the thermal decomposition process and phenomenological kinetic properties of explosives can be studied and tracked. Among them, the gas measurement method, which is to put explosives into a confined space and measure the pressure change of gas products, is one of the classic means to study the thermal decomposition of explosives. Commonly used gas measurement methods mainly include the Brinell pressure metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/16
Inventor 于谦熊鹰陈捷池钰周建华赵川德陈建波
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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