Influence of Particle Size of BPN Components on the Ignition Sensitivity of the Slapper-BPN Type EFDI

被引：0

作者：

Jian H.-T. ^{[1
,2
]}

Wang K. ^{[3
]}

Fei Y.-P. ^{[1
,4
]}

Liu J.-B. ^{[1
,4
]}

Yin G.-F. ^{[2
]}

Zhu P. ^{[1
,4
]}

Shen R.-Q. ^{[1
,4
]}

机构：

[1] School of Chemistry and Chemical Engineering, Naming University of Science and Technology, Nanjing

[2] Science and Technology on Applied Physical and chemistry Laboratory, Shanxi Applied Physics and Chemistry Research Institute, Xi'an

[3] Xi'an Modern Chemistry Research Institute, Xi'an

[4] Micro-Nano Energetic Devices Key Laboratory, Ministry of Industry and Information Technology, Nanjing

来源：

Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | 2024年 / 47卷 / 03期

关键词：

BPN; EFDI; exploding foil initiator (EFI); explosion mechanics; in-line exploding foil ignition; interface morphology of drug column; spray drying;

D O I：

10.14077/j.issn.1007-7812.202312009

中图分类号：

学科分类号：

摘要：

To investigate the effect of the particle size of boron/potassium nitrate (BPN) components on the ignition sensitivity of Slapper-BPN type of exploding foil detonation initiator (EFDI), several BPN formulations consisted of boron powder (B) and potassium nitrate (KNO3 ) with different particle sizes were designed and prepared. The particle size of B powder was characterized by a laser particle size analyzer, and the characteristics of the quantity and volume particle size distributions of B powder were discussed. The influence of KNO3 particle size on the interface morphology of BPN agents were obtained through scanning electron microscopy (SEM). Based on the differential scanning calorimetry (DSC) data, the pre-exponential factor, apparent activation energy, the lowest thermal decomposition temperature, and the thermal explosion critical temperature of different BPN formulations were calculated, and the influence of BPN component particle size on its kinetic performance was analyzed. According to the Lang lie method, the critical ignition voltage and standard error of different BPN formulations were obtained, and the effect of BPN kinetic performance and interface morphology of the agent on the ignition sensitivity were discussed. The results indicate that the particle size of BPN components mainly affect the ignition sensitivity of EFDI from the thermal decomposition properties of BPN and the interface morphology of BPN grain. The increase in particle size of BPN components makes the lowest thermal decomposition temperature of BPN agents increase and reducies the ignition sensitivity of BPN. The decrease in particle size of BPN components alters the interface morphology of BPN grain, resulting in a denser accumulation of BPN particles, reducing the gaps between particles and agents, hindering the heat transfer channels of BPN, which finally reduces the ignition sensitivity of EFDI under lowdensity charging conditions. Therefore, the consistency of B powder particle size has a certain impact on the standard deviation of low-density BPN ignition sensitivity. © 2024 China Ordnance Industry Corporation. All rights reserved.

引用

页码：245 / 253

页数：8

共 23 条

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