Researches On High Boron Content And High Combustion-rate Boron-Based Fuel-Rich Solid Propellants

On the basis of a great deal of experiments and theoretical analysis, the influences of conditions on coating boron and agglomerating boron have been studied in this paper. The influences of agglomerated boron on processing of high boron-based fuel-rich solid propellants also have studied. The propellant with boron content 34% and super-fine oxidant content 20% was successfully manufactured, and the burning-rate of propellant at atmosphere is 4.6 mm/s.The conclusions of this paper are followed:1. The processing of coating boron with AP/KP, HTPB, TDI and Polystyrene were studied, and the influences of coating boron with different way to the processing of boron-based fuel-rich propellant also were studied. Some research results are followed: (a) Coating boron can highly reduce the viscosity of boron-based fuel-rich propellants. (b) Rheology parameters of boron coated with HTPB are best.2. Researches on the technics of boron agglomerating with dry and wet condition in detail. We consider: (a) boron particles agglomerated with technology in wet condition are high spherical, small and well-proportioned, (b) The technology with dry condition is simpleness and the radius of boron particles are big.3. The influences of the agglomerated boron to the processing of boron-based fuel-rich propellants were studied. The boron contend can be improved to 34% by using . boron agglomerating with wet condition.4. Results of burning-rate indicated that it can increase the burning-rate of propellants by adopting boron agglomerating, and it can improve the content of superfine oxidant( < 3/u).5. The combustion residues of boron-based fuel-rich propellants is well distributing, and the eject efficiency of propellant can be improved by usingboron agglomerating.