Boron-containing explosive and preparation method thereof

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...

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Problems solved by technology

Patent 201010052051.0 announced that the RDX-based aluminum-boron explosive has a heat of detonation of 8729J / g, but the overall density is low, and there is no oxidant in the composition, so that the completeness of the reaction between aluminum powder and boron powder in the detonation process is low, so release The energy is low, and the energy density cannot meet the requirements of the warhead charge

The above two formulations have shortcomings: CL-20-based aluminum-containing composite explosive should improve the oxidation performance of its oxidant and the energy of the added combustible metal; RDX-based aluminum-boron explosive should improve the energy and density of its main explosive, and add Good oxidizing agents; both of which greatly limit the development and application of boron-containing explosives

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