Copper azide fabricated by nanoporous copper precursor with proper density

Abstract Copper azide in-situ fabricated by nanoporous copper (NPC) precursor, as a replacement of lead-based primary explosives, have showed many promising advantages. In this work, NPC film with controllable density was prepared by electroless plating using polystyrene (PS) templates and copper azide with large density and enhanced initiation performance was subsequently in situ fabricated by NPC film with proper density. The tunability of NPC density or porosity was controlled by adjusting the loading amount and particle size of PS. For copper azide fabrication, the proper density of NPC should be slightly less than the ideal value of 1.12 g·cm −3 . The density of copper azide prepared by NPC with density of 1.005 g·cm −3 was 2.014 g·cm −3 , attaining 81.15% of theoretical density. The in-situ fabricated copper azide micro-charge has showed enhanced initiation performance compared to previous study.