This investigation deals with the fundamental combustion features of the consolidated
mixtures of boron and potassium perchlorate. The burning rate, temperature sensitivity,
and heat of reaction were obtained. The initial temperatures tested were 77 K(boiling point of liquid nitrogen),
195 K(sublimation point of dry ice), and 293 K(room temperature).
The consolidated mixtures ignited even at 77 K and 0.04 MPa then burned uninterruptedly.
The relationship between burning rate and pressure under different initial temperatures
obeyed Vieille's Law. The temperature sensitivities of the burning rate were in the range
of 1.5-4.5×10-3K-1, same as those of the ordinary propellants. The burning rate reached
maximum near 35 wt% of boron at 3 MPa.
The chemical equilibrium calculations for the combustion of the tested mixtures were carried out
by means of STANJAN. The calculations were conducted at constant volume, modeling the situation
in the calorimeter bomb and adiabatic flame temperature, heat of reaction, and combustion
products were obtained. The main combustion products at 298 K were predicted as B, B2O3,
and KCL. They were confirmed by means of X - ray diffraction analysis.
ホウ素/過塩素酸カリウム混合物の燃焼速度を減圧下から加圧下において測定した。 初期温度は液体窒素温度, ドライアイス温度, 室温とした。 いずれの組成も極低温, 減圧下においても着火し, 室温, 加圧下と同様に燃焼した。 温度感度は一般の推進薬のそれとほぼ同程度であった。 熱量計を用いて反応熱を求め, 燃焼生成物の同定をX線回折で行い, 熱量計の反応条件で行った化学平衡計算結果と比較した。