Abstract
Zirconium (Zr) and barium chromate (BaCrO4) is a pyrolant of high energy content. Zr has a high and BaCrO4 a low sensitivity. The mixture of the two components has been investigated with respect to its ignition characteristics. The ignition delay time of the pyrolant decreases with an increasing concentration of Zr particles. That means, since the concentration of Zr is proportional to its total surface area S, the ignition delay time decreases with increasing S. An ignition delay time, τig, is obtained adding τp and τc, where τp is the physical ignition delay time and τc is the chemical ignition delay time. τp does not change when the concentration of Zr increases. However, τc decreases with an increasing concentration of Zr, resulting in an increase of its surface area S. It is expected that Zr easily reacts with barium chromate.
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