Analysis of Electro Explosive Performance of Al/MoO3 Bridge Wire Initiating Explosive Devices with Different Modulation Ratio

In order to improve the shortcomings such as low ignition output energy of bridge wire pyrotechnics, poor anti-electromagnetic interference ability, and incompatibility with microelectronics manufacturing process, magnetron sputtering technology is used to integrate Nano Al/MoO
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film into bridge wire igniter. There are 5 kinds of energetic bridge wire igniter BW-Al/MoO
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, 20nm/30nm, 60nm/90nm, 75nm/75nm, 85nm/65nm, 120nm/180nm. The results of electric explosion experiments show that with the increase of excitation voltage, the critical ignition time and total action time of the energetic bridge wire are significantly reduced, and the critical ignition energy and total action energy are significantly increased; the Al/MoO
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bridge wire with a modulation period of 50nm ignites. The ignition currents of 50% and 99.9% under constant current conditions are only 50mA and 90mA, and the ignition voltages of 50% and 99.9% under the conditions of capacitor discharge excitation are 2.30V and 2.56V respectively; the modulation period increases to 150nm and 300nm, both the current ignition sensitivity and the voltage ignition sensitivity show a significant upward trend; the Al/MoO
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reactive thin film ignition device with the bridge wire as the transducer element can ignite the B/KNO
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tablet when the ignition gap is 1mm. When the bridge wire without Al/MoO
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film is in close contact with the B/KNO
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tablet and the excitation voltage is 50V, the tablet cannot be ignited.