Authors: Linlin Liu Guoqiang He Yinghong Wang
Publish Date: 2013/04/06
Volume: 114, Issue: 3, Pages: 1057-1068
Abstract
High pressure DSC and simultaneous TG/DSC were used to study the different kinds of boron that was used in the fuelrich propellant and the amorphous boron in different gases and different pressure Also some of the samples before the experiment and after the experiment were analyzed by the SEM The results show that 1 there is a big exothermic peak between 550 °C and 850 °C for all the samples because the combustion heat of boron is very high and the exothermic peak appears in advance when the pressure or the oxygen concentration increases 2 Although the reaction process of all the samples with air or oxygen could be divided into five stages the reaction characteristics are different from each other Especially amorphous boron is much more active than the boron used in the fuelrich propellant 3 The exothermic peak at about 700 °C appears in advance and the percentage conversion of boron decreases when the content of magnesium increases and boron–magnesium compound is used as the raw materials 4 Some samples start to lose their mass for the sake of the evaporation of the BOn
Keywords: