Facile Preparation of Micrometer KClO?/Zr Energetic Composite Particles with Enhanced Light Radiation.

ABSTRACT: Developing energetic composite materials consisting of fuel and oxidizer is an effective strategy to enhance the energy release property. However, this strategy has rarely been applied in Potassium Perchlorate (KClO?)-containing energetic materials, even though KClO? is a much stronger oxidizer than most previously reported metal-oxide oxidizer. One of the main obstacles is the lack of simple and in situ ways to introduce KClO? into the composite. In present work, micrometer KClO?/Zirconium (KClO?/Zr) composite particles were successfully prepared using a facile chemical solution-deposition method. The structure and particle morphologies of as-obtained KClO?/Zr composite were characterized by X-ray diffraction (XRD) and scanning electronic microscope (SEM)-EDS (Energy Dispersive Spectrometer). The evolutionary combustion behavior was evaluated using flame-based light-radiation spectra and successive photography technique. Results showed that the morphology, light-radiation properties and flame-evolution characteristics of KClO?/Zr composite varied with the content of KClO? and the particle size of Zr. Compared with the mechanical mixture of KClO?/Zr, the KClO?/Zr composite showed much higher light-radiation intensity and longer light-emission duration time after reasonably controlling the preparation parameters. Flame photographs revealed that the enhanced light radiation of KClO?/Zr composite should be ascribed to higher use efficiency of "oxygen" in the oxidizer, which promoted both the solid?solid and solid?gas reaction pathways between KClO? and Zr.

SUBMITTER: Kang X 

PROVIDER: S-EPMC6356741 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature