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Silver azide initiating explosive film and preparation method thereof

A technology of silver azide and primary explosives, which is applied in the fields of azide/azide/halogen azide, offensive equipment, coating, etc., and can solve problems such as complex synthesis process, high risk, and prominent safety issues. The preparation process is simple and efficient, the operation safety is high, and direct contact is avoided

Active Publication Date: 2021-06-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain problems in these methods. First, the synthesis process is complicated and the risk is high. Second, the generated product mainly exists in the form of particles. The charging method used is not compatible with the MEMS process, and the safety problem in the charging process is highlighted.

Method used

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  • Silver azide initiating explosive film and preparation method thereof
  • Silver azide initiating explosive film and preparation method thereof
  • Silver azide initiating explosive film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1, configure porous silver electrolyte, use water as solvent, composition is 0.01mol / L silver sulfate, 1.5mol / L potassium thiocyanate and 1.0mol / L ammonium chloride; configure azide electrolyte, use water as The solvent is composed of 0.02mol / L sodium azide.

[0027] Step 2, using the electrochemical cathodic deposition method, the conductive substrate is subjected to electrode reaction in the porous silver electrolyte configured in step 1, and the current density is 1.0A / cm 2 , the response time is 30s. After the reaction is finished, it is dried to obtain a porous silver film.

[0028] Step 3, using the electrochemical anode azidation method, using the porous silver film prepared in step 2 as the anode, and performing electrode reaction in the azide electrolyte configured in step 1, with a current density of 1.0mA / cm 2 , the reaction time is 10min. After the reaction is finished, it is dried to obtain a porous silver azide primer film.

[0029] figure 1 It i...

Embodiment 2

[0033] Step 1, configure a porous silver electrolyte, using water as a solvent, the composition is 0.005mol / L silver sulfate, 0.5mol / L potassium thiocyanate and 0.5mol / L ammonium chloride; configure an azide electrolyte, using water as The solvent is composed of 0.01mol / L potassium azide.

[0034] Step 2, using the electrochemical cathodic deposition method, the conductive substrate is subjected to electrode reaction in the porous silver electrolyte configured in step 1, and the current density is 0.5A / cm 2 , the response time is 60s. After the reaction is finished, it is dried to obtain a porous silver film.

[0035] Step 3, using the electrochemical anode azidation method, using the porous silver film prepared in step 2 as an anode, and performing an electrode reaction in the azide electrolyte configured in step 1, with a current density of 10mA / cm2 , the reaction time is 5min. After the reaction is finished, it is dried to obtain a porous silver azide primer film.

Embodiment 3

[0037] Step 1, configure a porous silver electrolyte, using water as a solvent, the composition is 0.02mol / L silver sulfate, 2mol / L potassium thiocyanate and 2mol / L ammonium chloride; configure an azide electrolyte, using water as a solvent, The composition is 1mol / L sodium azide.

[0038] Step 2, using the electrochemical cathodic deposition method, the conductive substrate is subjected to electrode reaction in the porous silver electrolyte configured in step 1, and the current density is 2A / cm 2 , the response time is 10s. After the reaction is finished, it is dried to obtain a porous silver film.

[0039] Step 3, using the electrochemical anode azidation method, using the porous silver film prepared in step 2 as the anode, performing electrode reaction in the azide electrolyte configured in step 1, and the current density is 0.1mA / cm 2 , The reaction time is 30min. After the reaction is finished, it is dried to obtain a porous silver azide primer film.

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Abstract

The invention discloses a silver azide initiating explosive film and a preparation method thereof. According to the method, het silver azide initiating explosive film is integrated on the surface of a conductive substrate in situ by adopting a two-step electrochemical method. The preparation method specifically comprises the following steps: firstly, preparing a porous silver film by adopting an electrochemical cathode deposition method, and then taking the porous silver film as a precursor, and obtaining the porous silver azide primary explosive film by adopting an electrochemical anode azidation method. Compared with a traditional silver azide preparation method, the method has the advantages that use of high-risk chemical reagents is avoided, and the preparation process is simple, efficient, safe and controllable; and the in-situ growth mode does not need an additional charging process, is highly compatible with the MEMS process, and has a good application prospect in the field of micro-explosion systems.

Description

technical field [0001] The invention belongs to the field of energetic materials, and relates to a silver azide primer film and a preparation method thereof. Background technique [0002] Priming powder is a kind of energetic material that can be detonated under weak stimuli (such as impact, friction, static electricity, heat, laser, flame, etc.), and can quickly complete combustion to detonation. The initial charge of the device. The main components of current commercial and military primary explosives are still lead azide and lead styphate. Although lead-based primary explosives have good detonation ability and high flame sensitivity, the heavy metal lead will cause serious environmental pollution, affect the central nervous system, kidneys and blood, and cause chronic harm to human health. In addition, lead-based primary explosives are difficult to meet the development requirements of miniaturization of explosive systems due to insufficient detonation energy and large c...

Claims

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Application Information

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IPC IPC(8): C06C7/02C25D3/46C25D11/00C01B21/08
CPCC06C7/02C01B21/08C25D3/46C25D11/00C01P2002/72C01P2004/03C01P2002/88
Inventor 张钊荧张文超俞春培但雨欣王嘉鑫陈俊宏杨格行陈亚杰宋长坤先明春
Owner NANJING UNIV OF SCI & TECH
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