Abstract:The present status of research,especially,the good energy characteristics and “clear”combustion exhaust of boron-based propellant were reviewed and discussed.In order to improve the burning characteristics,the author proposed some approach and technique to solve the problems originated from the low susceptibility of boron to ignite and combustion which would be of benefit to the further research of boron-based solid propellants.
Abstract:The large quantity of pollutants,including primerily hydrogen chloride and other propellant combustion products like dioxine and some carcinogens from rocket exhaust,are a serious threat to the atmosphere in which the humankind live,In this paper some ways to develop chlorine- and fluorine-free solid propellants and the new type of oxidizers with superior properties are discussed.From the viewpoint of putting the energy,chemical stability and combustion regularity in the important place,the author proposes that ammonium nitrate,hydrazine nitrate,ammonium dinitramide and hydrazine nitroform would be suitable oxidizers to substitute ammomium perchlorate and HMX in solid propellants.The thermodynamic calculation for some model formulations were made and compared width those of some conventional propellants.The results obtained therefrom may be taken as a basis to develop the ecologically safe propellant.
Wang De-mei , Guo Shui-quan , Zhang Lian-he
Abstract:A promising HTPB propellant formulation is presented in this paper。 Itsburning rate can be regulated from 25 to 30mm/s and the specific impulse is greater than2354N· s/kg,pressure exponent n<0.4.Furthermore,the processability(slurry 5h 50<700Pa·s)and mechanical strength(25℃, σm=1.0MPa,-40℃,εm>30%)are satisfactory to practical requirements.
Sha Heng , Li Feng-sheng , SongHong-chang , Chen Shu-lin
Abstract:In order to keep UFAP from coagulation during storage,various surface modifications of UFAP were studied.The influence of using modified UFAP upon the characteristics of the high burning rate propellant is described.
Abstract:N-Nitrodihydroxyethyl dinitrate(DINA)is a useful energetic plasticizer in double base(DB) propellant,which is beneficial to energy increase and ablation reduction.,due to its advantages over nitroglycerin (NG)such as the high capability to solve and plasticize the high nitrogen content nitrocellulose(NC) and larger specific volume. In this paper the effects of these factors on the formulation and properties of DB propellant are analyzed and discussed ,and some data would be useful for the research and manufacture thereof.
Abstract:This paper described the physics process of a plastic flyer accelerated by an exploded metal foil, driven by a strong electric pulse.Different calculation ways were given to approximately determine the velocity of theflyer and their results were compared with the practically measured velocity.
Abstract:In order to explore new energetic materials with lower production cost and higher density than that of PYX synthesized in Los Alamos National Laboratory,the title compound was synthesized by using 2-aminopyridine as starting material and through a succession of condensation,nitration,and ammoniation reactions. Some of the theoretical analyses concerning the compound are given.
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Editorial Board of Chinese Journal of Energetic Materials
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