Abstract
Co 3 O 4 nanorods were synthesized onto silicon substrates successfully by an ammonia-evaporation-induced method. Then Al was deposited on the synthesized Co 3 O 4 samples by magnetron sputtering. The prepared Al/Co 3 O 4 nanorods were characterized by field emission scanning electron microscopy, X-ray diffraction and fourier transform infrared spectroscopy. It was found that Co 3 O 4 nanorods grow vertically and compactly on silicon substrates with a diameter of ~400 nm. Nano-Al coated the outside of the Co 3 O 4 nanorods to form a kind of core-shell nanostructure. Based on the differential scan thermal analysis, the optimal thickness of Al deposited on the Co 3 O 4 was 5 µ m under experimental condition with a maximal exothermic heat of 2254 J/g. A kind of initiator was realized by integrating Al/Co 3 O 4 with a semiconductor bridge (SCB) and its firing performance was tested. The discharge voltage threshold for the initiator was 45 V and its critical initiation energy varied from 8.30 mJ to 9.10 mJ. The combustion flame duration of the initiator was 180 µ s which was 80 µ s longer than that of ordinary SCB.
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