اثر نانو ذرات میله‌ای‌شکل اکسید آهن هماتیت بر خواص یک پیشرانه جامد مرکب

Iron oxide as a burning rate catalyst commonly used in many of solid composite propellants. As the particle size of this component decreased, the final properties of the propellant change. In this research, effects of using 1 percent by weight of nano hematite iron oxide (α-Fe2O3) investigated on properties of an HTPB/AP/Al formulation and compared with the same propellant containing micronized iron oxide. Nano Fe2O3 has a rod shape with a diameter of 40 nm and a length of about 150 nm. The test performed on the propellant slurry showed that applying nano particles instead of micronized powder increase the viscosity from 4.1 to 6.3 kp. Tensile strength and hardness of cured sample increased 22 and 5%, respectively. While strain reduced from 56 to 45%. This replacement enhanced the burning rate of propellant by an average of about 20%. Also, the pressure index (n) changed from 0.3927 to 0.3517.