Study on Low Energy Exploding Foil Igniter

In order to decrease the firing energy of B/KNO3 composition ignited by the exploding foil igniter,the components of B/KNO3 were refined,and the loading density was optimized.The firing experiments were carried out using Bruceton method with the loading density of 1.50-1.64 g·cm-3,and the fire capacitance of 0.12 μF.The burst current of ultrafine B/KNO3 composition ignited by the exploding foil igniter was also tested.Results show that the average value of 50% firing energy of ultrafine B/KNO3 composition ignited by the exploding foil igniter is 29 mJ,and the all-fire burst current is about 500 A.