Jianhua Hou,Dongmei Ren,Jiarong Duan,Xiaobao Liu,Yongqi Da,Jianbing Xu,Yinghua Ye
Aiming at the problem that the ignition ability of semiconductor bridge (SCB) is limited by the quality of bridge area, an energetic semiconductor bridge (ESCB) was prepared by 3D direct writing printing method. Using Al/CuO as the main component of the energetic ink and nitrocellulost (NC) as the binder, an energetic ignition bridge was successfully prepared by combining the energetic ink on the SCB surface. The electric detonation and ignition experiments of SCB and ESCB were carried out by means of capacitive discharge, and the gap ignition experiments proved that the ignition ability of SCB was successfully enhanced by energetic ink. In the electrical explosion experiment, under the excitation of 30 V capacitor discharge, the melting and vaporization time of ESCB bridge zone is longer than that of SCB, because the energetic film absorbs the heat generated by the bridge zone. Due to the bonding effect of NC, Al and CuO are more closely combined and the reaction is more complete, and the heat release of energetic ink is 1232 J/g. At 30 V/100 µF, the ESCB can ignite the B/KNO 3 charge at an 10 mm gap when the ink charge is 3 mg. The results demonstrate the strong ignition ability of ESCB, which has a good application prospect in the use of ignition and fire transmission sequences.
Research on green primary explosives with lead-free and excellent ignition performance is of significance for practical applications. In this work, we have developed a novel, green, and facile strategy for synthesizing copper azide@porous carbon hybrids (CA@PC) based on ionic cross-linked hydrogel with low-cost cellulose derivatives as the starting material, in which the CA nanoparticles are uniformly distributed in the porous carbon skeletons. The detailed characterizations and control experiments demonstrated that such an outstanding performance originates from the excellent electric conductivity of nanoscale carbon cages. With the favorable unique structures, the as-prepared hybrids can greatly benefit a new type of energetic materials, which exhibit a very low electrostatic sensitivity of 1.06 mJ. Interestingly, the hybrids possess a high ignition ability, and the flame sensitivity can even achieve 47 cm, superior to those well-developed CA-based materials reported previously. This work paves the way toward the design and development of next-generation highly efficient energetic materials.
危险品化学品经营许可证（带存储）