Boron-containing explosive and preparation method thereof

A technology of explosives and boron powder, which is applied in the field of boron-containing explosives and its preparation, can solve the problems that the energy density cannot meet the warhead charge, limit the development and application of boron-containing explosives, and have low reaction completeness, so as to improve the reaction completeness, The effect of increasing the charge density and reducing the diffusion distance

A technology of explosives and boron powder, which is applied in the field of boron-containing explosives and its preparation, can solve the problems that the energy density cannot meet the warhead charge, limit the development and application of boron-containing explosives, and have low reaction completeness, so as to improve the reaction completeness, The effect of increasing the charge density and reducing the diffusion distance

CN112479795AInactive Publication Date: 2021-03-12XIAN MODERN CHEM RES INST
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  • Boron-containing explosive and preparation method thereof
  • Boron-containing explosive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This embodiment is implemented according to the following mass percentage composition: 54% hexanitrohexaazaisowurtzitane; 20% aluminum powder; 10% boron powder; 14% polytetrafluoroethylene; 2% vinylidene fluoride-perfluoropropylene copolymer thing.

[0017] Preparation of this example

[0018] (1) Preparation of ternary mechanically activated particles: Add 100g of aluminum powder (FLQT4), 50g of boron powder and 70g of polytetrafluoroethylene into a high-energy ball mill, add 500mL of n-hexane as a ball milling aid, and perform reaction inhibition ball milling; planetary ball mill The volume of the ball milling tank is 2L, the operating speed is controlled at 800-850 rpm, the ball milling is 40min, the sample is taken out, dried at 40°C, and set aside.

[0019] (2) Preparation of binder: 10 g of vinylidene fluoride-perfluoropropylene copolymer was dissolved in 200 ml of ethyl acetate to prepare a solution for later use.

[0020] (3) Mixing of explosive components: 27...

Embodiment 2

[0025] This embodiment is implemented according to the following mass percentage composition: 44% hexanitrohexaazaisowurtzitane; 25% aluminum powder; 10% boron powder; 19% polytetrafluoroethylene; 2% vinylidene fluoride-perfluoropropylene copolymer thing. The preparation steps refer to Example 1.

[0026] The performance test data shows that the theoretical density of this example is 2.219, which is 3.8% higher than that of CL-20-based aluminum-containing explosives, the heat of detonation is 3.5% higher than that of CL-20-based aluminum-containing explosives, and the energy density is 7.48% higher than that of CL-20-based aluminum-containing explosives %, low mechanical sensitivity and good safety performance.

Embodiment 3

[0028] This embodiment is implemented according to the following mass percentage composition: 54% hexanitrohexaazaisowurtzitane; 20% aluminum powder; 5% boron powder; 19% polytetrafluoroethylene; 2% vinylidene fluoride-perfluoropropylene copolymer thing. The preparation steps refer to Example 1.

[0029] The performance test data shows that the theoretical density of this example is 2.180, which is 2.0% higher than that of CL-20-based aluminum-containing explosives, the detonation heat is 2.1% higher than that of CL-20-based aluminum-containing explosives, and the energy density is 4.15% higher than that of CL-20-based aluminum-containing explosives %, low mechanical sensitivity and good safety performance.

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Abstract

The invention discloses a boron-containing explosive and preparation method thereof. The preparation method comprises the following steps: mechanically activating aluminum powder, boron powder and polytetrafluoroethylene into high-energy composite particles by adopting a reaction inhibition ball milling process, so that the surface of the boron powder is coated with the aluminum powder and the polytetrafluoroethylene, and the diffusion distance between the boron powder and the polytetrafluoroethylene and the diffusion distance between the boron powder and the aluminum powder are reduced, the combination tightness degree of the boron powder, polytetrafluoroethylene and aluminum powder is improved, and the reaction completeness of the boron powder is improved; then mixing the high-energy composite particles with a high-energy explosive so as to improve the energy level of an explosive formula system; and finally adding an adhesive and a desensitizer, and performing kneading to form the boron-containing explosive. The boron-containing explosive disclosed by the invention comprises the following components in percentage by mass: 50%-60% of hexanitrohexaazaisowurtzitane (CL20); 15%-30%of aluminum powder; 5%-10% of boron powder; 10%-20% of polytetrafluoroethylene; and 1%-2% of a vinylidene fluoride- perfluoropropylene copolymer. The explosive is suitable for warm-pressing warhead charging and penetration warhead charging.

Description

technical field [0001] The invention relates to a boron-containing explosive and a preparation method thereof, which are suitable for charge of a warm-pressed warhead and a penetrating warhead. [0002] technical background [0003] The detonation velocity and detonation heat of hexanitrohexaazaisowurtzitane (CL-20) can reach 9500m / s and 6238kJ / kg, which are higher than the commonly used HMX and RDX explosives. PAX-29 and PAX-11 are two new types of CL-20-based aluminum-containing explosives successfully developed in the United States in recent years. The aluminum powder content is 15%, and the detonation velocity is about 8800m / s, but the detonation heat value representing the explosion energy output is On the low side. At present, the theoretical density of the CL-20-based aluminum-containing composite explosive formula developed in China is 2.137g / cm 3 , the detonation velocity is 7250m / s (charge density 2.03g / cm 3 ), the detonation heat is 8900J / g. Ammonium perchlorat...

Claims

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Application Information

Patent Timeline
12 Mar 2021
Publication
CN112479795A
IPC
C06B33/08; C06B21/00
CPC
C06B33/08; C06B21/0008
Inventors
冯晓军; 封雪松