Preparation Of Boron Composite Particles And Its Thermal And Chemical Properties

Coating technics of boron particles& milling technics of different diameter boron particles and its predominant factors were researched systemically and profoundly,on the base of a great deal of experiments. Surface character& thermal chemistry behavior are characterized of composite particles&particles of different diameter. Composite particles are applied in the propellant and characterized.The results are shown as follows:1.AP,nano aluminium powder,LiF,HTPB are separately coated on boron particles and its technics is explored. Composite particles are characterized by different testing methods ,such as SEM, EDS, DTA, TG..Conclusions are represented that: (a) Thermal chemistry behavior of boron particles is improved significantly by coating ; (b) Thermal chemistry behavior of boron particles which is coated with nano aluminium is best, (c) Mechanico-chemical Teatment is good for coating.2.Different diameter boron particles are made with planet milling-ball and its technics has been achieved.Conclusions are represented that:After milling, diameter of boron particles is became well-proportioned; Thermal chemistry behavior of boron particles of less diameter is improved observably.3.Composite particles are applied in the propellant and characterized by DTA, Conclusions are represented that: Thermal chemistry behavior of propellant which contains composite particles is better than the blank propellant which uses uncoated boron particles.