Method for increasing combustion efficiency of boron powder

Abstract

The invention relates to a method for increasing the combustion efficiency of boron powder. The method comprises the following steps: firstly, weighing fluororubber and acetone by the mass ratio thereof being 1:(1-200); then, dissolving the fluororubber in the acetone to obtain fluororubber solution; next, adding boron powder to the fluororubber solution by the mass ratio between the boron powder and the fluororubber being 1:(0.01-0.5); stirring at 20 to 70 DEG C; and drying the obtained product at 20 to 100 DEG C for 1h to 20h after the acetone is fully evaporated to obtain the boron powder coated with fluororubber. The method of the invention has the advantages of simple process and convenient operation; the boron powder as a solid fuel prepared by the method of the invention has the advantages of stable quality and reliable performance; and the method can effectively increase the combustion efficiency of boron powder.

Description

technical field [0001] The invention relates to a method for improving the combustion efficiency of boron powder. Specifically, it is a method to improve the combustion efficiency of boron powder, a solid fuel used in missiles. Background technique [0002] Tactical missiles are important weapons necessary for modern national defense, and their range, maneuverability, and supersonic travel performance depend on the solid fuel energy of the missile motor and propellant. Boron has long been the preferred solid fuel for missiles due to its high mass and volumetric energy density. However, boron oxide produced by boron combustion has the characteristics of low melting point and high boiling point. After boron oxide is generated, it will wrap on the surface of boron to prevent further reaction between air and boron, thus greatly reducing the combustion efficiency of boron. [0003] At present, researchers mainly use inorganic and organic substances to coat boron powder to impro...

AI Technical Summary

Problems solved by technology

AP-coated boron particles are beneficial to increase the combustion rate of fuel, but due to the serious lack of oxygen in the fuel as a whole, the method of increasing the combustion efficiency of boron by adding AP is limited to a certain extent

Zhang Qiongfang etc. have reported the method that lithium fluoride is carried out coating boron powder (see " the lithium fluoride coating of superfine boron powder ", Chinese Journal of Explosives and Explosives, 2005, 28 (3): 8-11), lithium fluoride has The removal of the film can remove the boron oxide coated on the surface of boron after burning. However, since the inorganic lithium fluoride itself cannot burn, the addition of lithium fluoride increases the "dead weight" of the fuel, resulting in a propellant The reduction of boron content in the medium reduces the overall combustion efficiency of the fuel