Boron/potassium nitrate microspheres fabricated by electrostatic spraying and their combustion characteristic as pyrotechnic ignitor

  • Qian ZhongEmail author
  • Yanchun Li
  • Jun Chen
  • Dongming Song


Boron/potassium nitrate (B/KNO3) microspheres are fabricated by electrostatic spraying to enhance their combustion efficiency and capability of igniting target materials. Varying composition’s effect on reactivity and morphology was analyzed. Closed chamber tests were used to record the process of boron/potassium nitrate igniting guanidine nitrate/basic cupric nitrate gas generator. The results show that the spheres’ diameter is approximately 1–5 µm, the reaction peak temperature obtained from TG–DSC is decreased by 55 °C, and B/KNO3 sphere gets higher pressure and shorter ignition time. It takes only 2.18 s to ignite the gas generator completely, which is 2.32 s for traditional boron/potassium nitrate. In general, boron/potassium nitrate spheres show enhanced ignition capability and could be utilized in a broad variety of combustion systems.


Boron/potassium nitrate Pyrotechnic igniter Combustion efficiency 



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© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.CQC New Energy Technology School, Nanjing Vocational College of Information TechnologyNanjingPeople’s Republic of China
  2. 2.School of Chemical EngineeringNanjing University of Science and TechnologyNanjingPeople’s Republic of China

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