Research On Releasing Efficiency Of High Calorific Value Oxidation- Combustible System

The aim of this paper is to create high energy composition which has high detonation heat and detonation volume, with increasing the boron content and keeping the content of the main explosive in explosive formulations. We hope that in the high quality value of boron powder and high volume heat release more energy in combustion.But the melting and boiling points of boron is very high, it is difficult to melt and gasify, burning products(B2O3) usually covers the unreacted boron powder surface, hinder the further, which consult that the combustion of boron ignition and combustion performance is poor. And ammonium perchlorate(AP) can supply only limited oxygen content, we introduce potassium perchlorate(LiP) with the higher oxygen content. LiP-based propellants and explosives will have desirable characteristics such as high energy, superior mechanical properties and high combustion stability, but LiP-based energetic materials have the problem of burning rate and poor ignitability. In order to fully exploit the advantages of the two oxidants, the paper involve the ammonium perchlorate as the main oxidizer and potassium perchlorate as vice-oxidants and use two kinds of oxidants and boron powder to be mixed on the micron scalemeasures.The main research works of this paper are as follows:(1) The thermodynamic parameters of the compositions were optimized by using minimum free energy calculation method. The results show that the optimum ratio of B is 21% in the systems of the AP and LiP as the oxidants and B as the fuel. Optimum ratio AP / Li P range 45% :55%, while the results illustrate that the LiP can improve the energy of energetic materials.(2) The methods for crystallizing two novel AP based double Salt Oxidants and B are hydrothermal method. The thermal decomposition properties of all the samples were studied by differential scanning calorimetry(DSC).The micro-morphologies and crystal structures of double Salt Oxidants were characterized by scanning electron microscopy(SEM). The results show that two-oxidizers and boron in intermolecular are uniformly mixed. LiP plays roles of Crystal type stabilizer and catalyzer, and the two kinds of raw materials react mutually. Hydrothermal method is better than traditional.(3) Combustion Properties of double salt oxidants based energetic materials were researched via the datum of p-t and the heat of combustion test. The results show that two AP based double salt oxidants appear the better properties than the samples of physical mixtures. The ignitability of LiP based energetic materials is improved by coating method, while the burning rate is improved by hydrothermal method. AP based salt oxidants of hydrothermal method boost the reaction efficiency of detonation, and the release of energy is more complete in the composite explosive detonation.(4) We apply the hydrothermal treatment of mixed oxidants and boron to the underwater explosive, and study its effects on the underwater explosive energy.