Non-isothermal decomposition kinetics of copper azide nanowire array

Wang, Yanlan; Zhang, Fang; Zhang, Lei; Han, Ruishan; Zhang, Rui; Chen, Jianhua

doi:10.1088/1742-6596/1209/1/012015

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…Azide with excellent detonation performance mainly includes lead azide (LA), copper azide (CA), silver azide (SA), etc., among which lead azide and silver azide are no longer suitable for practical needs due to high cost, pollution, and other reasons. − However, copper azide is harmless to the ecosystem, and only a very small amount of charge can trigger secondary explosives, which has a very good application potential. However, its high electrostatic sensitivity ( E 50 = 0.05 mJ) seriously restricts its functional application. − More importantly, without additives such as binders, most primary explosives, including CA, are generally brittle and difficult to shape and charge successfully. Also, they are effortlessly scattered into finely partitioned particles, expanding the framework’s frailty.…”

Section: Introductionmentioning

confidence: 99%

Core–Shell Copper Azide-Based Nanofiber Films Prepared by Coaxial Electrospinning for MEMS Microinitiators

Wang

Yan

et al. 2023

ACS Appl. Nano Mater.

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The main bottleneck preventing powders from being used in a microinitiation system is the paradox between safety and detonation performance, as well as powders’ inherent brittleness and difficulty in shaping. To address this problem, we used the coaxial electrospinning technology to design and fabricate a core–shell film (CA@C–D) with low sensitivity and high energy. Electrostatic sensitivity (E 50 = 5.22 mJ) and flame sensitivity (H 50 = 51 cm) are both significantly lower than those of the raw copper azide (CA) material and can detonate secondary explosives. Extensive characterization and experiments show that the unusual core–shell structure of coaxial electrostatic spinning fibers is responsible for this significant improvement. This high specific surface area carbon shell wraps around the CA particles, providing double protection, while the superior thermal and electrical conductivity of the carbon material helps improve system safety and maintains the azide output performance. More importantly, it always maintains a good film structure and is simple to process, meeting the actual requirements of MEMS initiators and introducing a new scheme for the preparation of film-based initiators.

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Section: Introductionmentioning

confidence: 99%

Core–Shell Copper Azide-Based Nanofiber Films Prepared by Coaxial Electrospinning for MEMS Microinitiators

Wang

Yan

et al. 2023

ACS Appl. Nano Mater.

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“…And copper azide (CA), a potentially greener alternative to lead-based detonating agents, has a pentaerythritol tetranitrate detonation ability six times that of LA. However, the sensitivity of CA is too high, and the loading process is unstable, severely limiting its practical application [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A new strategy to prepare high-performance copper azide film for micro-initiator

Wang

Ren³

et al. 2023

Nanotechnology

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Copper azide (CA) has gradually become the chosen priming agent for microexplosive devices as a lead-free green priming agent. However, charge loading is challenging due to its high electrostatic sensitivity, severely limiting its practical application. In this study, copper hydroxide particles were evenly coated on the surface of carbon fiber using electrospinning and quick hot-pressing, and CA-based composites with uniform load were created using the in-situ azide technique while keeping good film characteristics. The produced CA-HP film has an electroostatic sensitivity of 3.8 mJ, which is much higher than the raw material of 0.05 mJ. The flame sensitivity has also been increased from 45 cm to 51 cm, and the use safety has been considerably enhanced. Furthermore, hot-pressed CA-HP films can improve the film's qualities, such as easy cutting and processing into the required shape, compatibility with MEMS processes, and the ability to successfully detonate secondary explosives with only 1 mg. This novel coupling technology expands the possibilities for developing high-safety primers for micro-initiator.

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Fabrication of electrostatic safety copper azide film with in situ growing MOF

Wang

Yan

et al. 2023

Defence Technology

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Non-isothermal decomposition kinetics of copper azide nanowire array

Cited by 3 publications

References 10 publications

Core–Shell Copper Azide-Based Nanofiber Films Prepared by Coaxial Electrospinning for MEMS Microinitiators

Core–Shell Copper Azide-Based Nanofiber Films Prepared by Coaxial Electrospinning for MEMS Microinitiators

A new strategy to prepare high-performance copper azide film for micro-initiator

Fabrication of electrostatic safety copper azide film with in situ growing MOF

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