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Related Experiment Video

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Preparation and Reactivity of Gasless Nanostructured Energetic Materials

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Published on: April 2, 2015

Exploring the Maximum Potential of Initiating Ability in Metal-Free Primary Explosives.

Qiong Yu¹, Zhiyuan Zheng¹, Zhenxin Yi¹

¹School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Journal of the American Chemical Society

|January 15, 2025

Summary

Researchers developed 1,8-diazido-bis([1,2,4]triazolo)[4,3-b:3

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Area of Science:

Energetic Materials Science
Chemical Engineering
Materials Science

Background:

Lead azide (LA) is a common primary explosive but faces toxicity and safety concerns.
Regulatory restrictions drive the need for safer, lead-free alternatives.
Current research focuses on developing next-generation primary explosives with enhanced safety and performance.

Purpose of the Study:

To synthesize and characterize a novel lead-free primary explosive, 1,8-diazido-bis([1,2,4]triazolo)[4,3-b:3',4'-f][1,2,4,5]tetrazine (DATTY).
To evaluate DATTY's safety, thermal stability, and initiating capabilities compared to lead azide.
To establish DATTY as a potential replacement for lead azide in explosive applications.

Main Methods:

Synthesis of 1,8-diazido-bis([1,2,4]triazolo)[4,3-b:3',4'-f][1,2,4,5]tetrazine (DATTY).
Measurement of nitrogen content, friction sensitivity, and heat of formation.
Assessment of initiating ability through minimum primary charge (MPC) tests.
Determination of detonation velocity (vD).

Main Results:

DATTY exhibits a high nitrogen content (80.3%) and is stable under ambient conditions.
DATTY shows significantly lower friction sensitivity (5 N) compared to lead azide (0.3 N).
DATTY has a high endothermic heat of formation (6.533 kJ g⁻¹).
Exceptional initiating ability demonstrated by a low MPC of 1 mg (vs. 10 mg for LA).
Record-breaking detonation velocity (vD = 8835 m s⁻¹).

Conclusions:

DATTY is a promising lead-free primary explosive with superior safety and initiating performance.
The study establishes DATTY as a new benchmark for next-generation primary explosives.
DATTY offers a safer and more efficient alternative to lead azide, addressing environmental and handling concerns.