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Vapor pressure testing device for easy-sublimation solid energetic materials

A test device, vapor pressure technology, applied in the direction of analyzing materials, instruments, etc., can solve the problems of easy introduction of errors, high price, equipment damage, etc., and achieve the effect of safe operation process and accurate results

Active Publication Date: 2012-08-29
XIAN MODERN CHEM RES INST
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] 2. Energetic materials have poor thermal stability, and are prone to decomposition or explosion due to local overheating during the heating process. Existing devices lack explosion-proof and explosion-venting designs, and safety accidents are likely to occur during measurement at high-temperature sections, resulting in equipment damage and casualties
[0006] 3. Generally, high-precision pressure sensors are required for measurement, which are expensive. In order to ensure the accuracy and service life of the sensors, indirect measurement is required to obtain the vapor pressure. For 10-10 4 The pressure of Pa, the way to realize the accurate transmission of pressure is complicated, and it is easy to introduce errors
[0007] 4. In the existing device, the solid to be tested cannot be used as the filling liquid in the zero pressure gauge. In addition, the determination of the balance position of the zero pressure gauge needs to be observed and judged by the tester, and the error is large

Method used

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  • Vapor pressure testing device for easy-sublimation solid energetic materials
  • Vapor pressure testing device for easy-sublimation solid energetic materials
  • Vapor pressure testing device for easy-sublimation solid energetic materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 (the saturated vapor pressure test method of TNAZ)

[0051] A new high energy density energetic material 1,3,3-trinitroazetidine (TNAZ, C 3 h 4 o 6 N 3 ) is a four-membered small ring compound, and its thermal stability is slightly better than that of hexanitrohexaazaisopentazane (HNIW, C 6 h 12 o 12 N 12 ), the initial decomposition temperature is higher than 240°C, although its energy level is only between RDX and HMX, its melting point is lower than 100°C, and it can be combined with many energetic materials such as TNT, PETN, Tetryl, RDX and DNTF, etc. Forms eutectics and is therefore a potential energetic material for casting or fusion casting. So far, the saturation vapor pressure of TNAZ and its relationship with temperature have not been reported in the literature. According to the technological conditions of explosive melting and casting or explosive and propellant casting, this paper chooses 328.0 ~ 403.0K, uses the static heating and cool...

Embodiment 2

[0082] With n-valeric acid (C 5 h 10 o 2 ) to carry out verification test, the results are shown in Table 4:

[0083] Table 4 N-valeric acid vapor pressure measurement data table

[0084]

[0085] [1] Yao Yunbin, Xie Tao, Gao Yingmin, eds. Handbook of Physical Chemistry, P623. Shanghai: Shanghai Science Press. 1985.

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Abstract

The invention discloses a vapor pressure testing device and a method for easy-sublimation solid energetic materials. The device comprises a vacuum pump, a sample pool, an equalizing pipe, an air gauge and a heating furnace. A solid sample inlet (35) is arranged on the sample pool (34), liquid storage spheres (31, 33) are respectively arranged on two sides of a zero position gauge pipe (32), mercury is filled inside the zero position gauge pipe (32), the sample pool (34) is communicated with the liquid storage sphere (33) via the equalizing pipe (19), and a vacuum air passage hose (12) is arranged between the other end of the liquid storage sphere (31) and the air gauge (9). The device and the method can measure vapor pressure data of the easy-sublimation solid energetic materials, realizeautomatically controlling test procedure and automatically acquiring, analyzing and processing test data, have safe test procedure and accurate result, and can meet engineering needs.

Description

technical field [0001] The invention relates to a device for testing the vapor pressure of an energetic material, in particular to a device and method for testing the vapor pressure of an easily sublimable solid energetic material. Background technique [0002] The development and production of melt-cast explosives and cast propellants are usually carried out in the range of 50-120°C. The saturated vapor pressure data of easily sublimable solid or volatile liquid energetic materials in this temperature range is the most important factor in the design formula. The content of components and the important basis for determining the safe production process conditions are also the basis for the selection of health protection measures for operators. Therefore, the key to solving the above problems is whether the saturated vapor pressure of easily sublimable solid energetic materials can be accurately measured. [0003] At present, there are many methods for testing vapor pressure a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N7/16
Inventor 丁黎衡淑云张皋韩芳邵颖慧何少蓉张林军岳璞张冬梅
Owner XIAN MODERN CHEM RES INST
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